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-rw-r--r--externals/demangle/Demangle.h104
-rw-r--r--externals/demangle/DemangleConfig.h93
-rw-r--r--externals/demangle/ItaniumDemangle.cpp588
-rw-r--r--externals/demangle/ItaniumDemangle.h5582
-rw-r--r--externals/demangle/StringView.h127
-rw-r--r--externals/demangle/Utility.h192
6 files changed, 6686 insertions, 0 deletions
diff --git a/externals/demangle/Demangle.h b/externals/demangle/Demangle.h
new file mode 100644
index 000000000..5b673e4e1
--- /dev/null
+++ b/externals/demangle/Demangle.h
@@ -0,0 +1,104 @@
+//===--- Demangle.h ---------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-FileCopyrightText: Part of the LLVM Project
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEMANGLE_DEMANGLE_H
+#define LLVM_DEMANGLE_DEMANGLE_H
+
+#include <cstddef>
+#include <string>
+
+namespace llvm {
+/// This is a llvm local version of __cxa_demangle. Other than the name and
+/// being in the llvm namespace it is identical.
+///
+/// The mangled_name is demangled into buf and returned. If the buffer is not
+/// large enough, realloc is used to expand it.
+///
+/// The *status will be set to a value from the following enumeration
+enum : int {
+ demangle_unknown_error = -4,
+ demangle_invalid_args = -3,
+ demangle_invalid_mangled_name = -2,
+ demangle_memory_alloc_failure = -1,
+ demangle_success = 0,
+};
+
+char *itaniumDemangle(const char *mangled_name, char *buf, size_t *n,
+ int *status);
+
+
+enum MSDemangleFlags {
+ MSDF_None = 0,
+ MSDF_DumpBackrefs = 1 << 0,
+ MSDF_NoAccessSpecifier = 1 << 1,
+ MSDF_NoCallingConvention = 1 << 2,
+ MSDF_NoReturnType = 1 << 3,
+ MSDF_NoMemberType = 1 << 4,
+};
+char *microsoftDemangle(const char *mangled_name, char *buf, size_t *n,
+ int *status, MSDemangleFlags Flags = MSDF_None);
+
+/// "Partial" demangler. This supports demangling a string into an AST
+/// (typically an intermediate stage in itaniumDemangle) and querying certain
+/// properties or partially printing the demangled name.
+struct ItaniumPartialDemangler {
+ ItaniumPartialDemangler();
+
+ ItaniumPartialDemangler(ItaniumPartialDemangler &&Other);
+ ItaniumPartialDemangler &operator=(ItaniumPartialDemangler &&Other);
+
+ /// Demangle into an AST. Subsequent calls to the rest of the member functions
+ /// implicitly operate on the AST this produces.
+ /// \return true on error, false otherwise
+ bool partialDemangle(const char *MangledName);
+
+ /// Just print the entire mangled name into Buf. Buf and N behave like the
+ /// second and third parameters to itaniumDemangle.
+ char *finishDemangle(char *Buf, size_t *N) const;
+
+ /// Get the base name of a function. This doesn't include trailing template
+ /// arguments, ie for "a::b<int>" this function returns "b".
+ char *getFunctionBaseName(char *Buf, size_t *N) const;
+
+ /// Get the context name for a function. For "a::b::c", this function returns
+ /// "a::b".
+ char *getFunctionDeclContextName(char *Buf, size_t *N) const;
+
+ /// Get the entire name of this function.
+ char *getFunctionName(char *Buf, size_t *N) const;
+
+ /// Get the parameters for this function.
+ char *getFunctionParameters(char *Buf, size_t *N) const;
+ char *getFunctionReturnType(char *Buf, size_t *N) const;
+
+ /// If this function has any any cv or reference qualifiers. These imply that
+ /// the function is a non-static member function.
+ bool hasFunctionQualifiers() const;
+
+ /// If this symbol describes a constructor or destructor.
+ bool isCtorOrDtor() const;
+
+ /// If this symbol describes a function.
+ bool isFunction() const;
+
+ /// If this symbol describes a variable.
+ bool isData() const;
+
+ /// If this symbol is a <special-name>. These are generally implicitly
+ /// generated by the implementation, such as vtables and typeinfo names.
+ bool isSpecialName() const;
+
+ ~ItaniumPartialDemangler();
+private:
+ void *RootNode;
+ void *Context;
+};
+} // namespace llvm
+
+#endif
diff --git a/externals/demangle/DemangleConfig.h b/externals/demangle/DemangleConfig.h
new file mode 100644
index 000000000..a8aef9df1
--- /dev/null
+++ b/externals/demangle/DemangleConfig.h
@@ -0,0 +1,93 @@
+//===--- DemangleConfig.h ---------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-FileCopyrightText: Part of the LLVM Project
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a variety of feature test macros copied from
+// include/llvm/Support/Compiler.h so that LLVMDemangle does not need to take
+// a dependency on LLVMSupport.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEMANGLE_COMPILER_H
+#define LLVM_DEMANGLE_COMPILER_H
+
+#ifndef __has_feature
+#define __has_feature(x) 0
+#endif
+
+#ifndef __has_cpp_attribute
+#define __has_cpp_attribute(x) 0
+#endif
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+#ifndef __has_builtin
+#define __has_builtin(x) 0
+#endif
+
+#ifndef DEMANGLE_GNUC_PREREQ
+#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
+#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
+ ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
+ ((maj) << 20) + ((min) << 10) + (patch))
+#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
+#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
+ ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
+#else
+#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0
+#endif
+#endif
+
+#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0)
+#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__))
+#else
+#define DEMANGLE_ATTRIBUTE_USED
+#endif
+
+#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0)
+#define DEMANGLE_UNREACHABLE __builtin_unreachable()
+#elif defined(_MSC_VER)
+#define DEMANGLE_UNREACHABLE __assume(false)
+#else
+#define DEMANGLE_UNREACHABLE
+#endif
+
+#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0)
+#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline))
+#elif defined(_MSC_VER)
+#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
+#else
+#define DEMANGLE_ATTRIBUTE_NOINLINE
+#endif
+
+#if !defined(NDEBUG)
+#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED
+#else
+#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE
+#endif
+
+#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
+#define DEMANGLE_FALLTHROUGH [[fallthrough]]
+#elif __has_cpp_attribute(gnu::fallthrough)
+#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]]
+#elif !__cplusplus
+// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
+// error when __has_cpp_attribute is given a scoped attribute in C mode.
+#define DEMANGLE_FALLTHROUGH
+#elif __has_cpp_attribute(clang::fallthrough)
+#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]]
+#else
+#define DEMANGLE_FALLTHROUGH
+#endif
+
+#define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle {
+#define DEMANGLE_NAMESPACE_END } }
+
+#endif
diff --git a/externals/demangle/ItaniumDemangle.cpp b/externals/demangle/ItaniumDemangle.cpp
new file mode 100644
index 000000000..5e078e3e2
--- /dev/null
+++ b/externals/demangle/ItaniumDemangle.cpp
@@ -0,0 +1,588 @@
+//===------------------------- ItaniumDemangle.cpp ------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-FileCopyrightText: Part of the LLVM Project
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// FIXME: (possibly) incomplete list of features that clang mangles that this
+// file does not yet support:
+// - C++ modules TS
+
+#include "Demangle.h"
+#include "ItaniumDemangle.h"
+
+#include <cassert>
+#include <cctype>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <functional>
+#include <numeric>
+#include <utility>
+#include <vector>
+
+using namespace llvm;
+using namespace llvm::itanium_demangle;
+
+constexpr const char *itanium_demangle::FloatData<float>::spec;
+constexpr const char *itanium_demangle::FloatData<double>::spec;
+constexpr const char *itanium_demangle::FloatData<long double>::spec;
+
+// <discriminator> := _ <non-negative number> # when number < 10
+// := __ <non-negative number> _ # when number >= 10
+// extension := decimal-digit+ # at the end of string
+const char *itanium_demangle::parse_discriminator(const char *first,
+ const char *last) {
+ // parse but ignore discriminator
+ if (first != last) {
+ if (*first == '_') {
+ const char *t1 = first + 1;
+ if (t1 != last) {
+ if (std::isdigit(*t1))
+ first = t1 + 1;
+ else if (*t1 == '_') {
+ for (++t1; t1 != last && std::isdigit(*t1); ++t1)
+ ;
+ if (t1 != last && *t1 == '_')
+ first = t1 + 1;
+ }
+ }
+ } else if (std::isdigit(*first)) {
+ const char *t1 = first + 1;
+ for (; t1 != last && std::isdigit(*t1); ++t1)
+ ;
+ if (t1 == last)
+ first = last;
+ }
+ }
+ return first;
+}
+
+#ifndef NDEBUG
+namespace {
+struct DumpVisitor {
+ unsigned Depth = 0;
+ bool PendingNewline = false;
+
+ template<typename NodeT> static constexpr bool wantsNewline(const NodeT *) {
+ return true;
+ }
+ static bool wantsNewline(NodeArray A) { return !A.empty(); }
+ static constexpr bool wantsNewline(...) { return false; }
+
+ template<typename ...Ts> static bool anyWantNewline(Ts ...Vs) {
+ for (bool B : {wantsNewline(Vs)...})
+ if (B)
+ return true;
+ return false;
+ }
+
+ void printStr(const char *S) { fprintf(stderr, "%s", S); }
+ void print(StringView SV) {
+ fprintf(stderr, "\"%.*s\"", (int)SV.size(), SV.begin());
+ }
+ void print(const Node *N) {
+ if (N)
+ N->visit(std::ref(*this));
+ else
+ printStr("<null>");
+ }
+ void print(NodeOrString NS) {
+ if (NS.isNode())
+ print(NS.asNode());
+ else if (NS.isString())
+ print(NS.asString());
+ else
+ printStr("NodeOrString()");
+ }
+ void print(NodeArray A) {
+ ++Depth;
+ printStr("{");
+ bool First = true;
+ for (const Node *N : A) {
+ if (First)
+ print(N);
+ else
+ printWithComma(N);
+ First = false;
+ }
+ printStr("}");
+ --Depth;
+ }
+
+ // Overload used when T is exactly 'bool', not merely convertible to 'bool'.
+ void print(bool B) { printStr(B ? "true" : "false"); }
+
+ template <class T>
+ typename std::enable_if<std::is_unsigned<T>::value>::type print(T N) {
+ fprintf(stderr, "%llu", (unsigned long long)N);
+ }
+
+ template <class T>
+ typename std::enable_if<std::is_signed<T>::value>::type print(T N) {
+ fprintf(stderr, "%lld", (long long)N);
+ }
+
+ void print(ReferenceKind RK) {
+ switch (RK) {
+ case ReferenceKind::LValue:
+ return printStr("ReferenceKind::LValue");
+ case ReferenceKind::RValue:
+ return printStr("ReferenceKind::RValue");
+ }
+ }
+ void print(FunctionRefQual RQ) {
+ switch (RQ) {
+ case FunctionRefQual::FrefQualNone:
+ return printStr("FunctionRefQual::FrefQualNone");
+ case FunctionRefQual::FrefQualLValue:
+ return printStr("FunctionRefQual::FrefQualLValue");
+ case FunctionRefQual::FrefQualRValue:
+ return printStr("FunctionRefQual::FrefQualRValue");
+ }
+ }
+ void print(Qualifiers Qs) {
+ if (!Qs) return printStr("QualNone");
+ struct QualName { Qualifiers Q; const char *Name; } Names[] = {
+ {QualConst, "QualConst"},
+ {QualVolatile, "QualVolatile"},
+ {QualRestrict, "QualRestrict"},
+ };
+ for (QualName Name : Names) {
+ if (Qs & Name.Q) {
+ printStr(Name.Name);
+ Qs = Qualifiers(Qs & ~Name.Q);
+ if (Qs) printStr(" | ");
+ }
+ }
+ }
+ void print(SpecialSubKind SSK) {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ return printStr("SpecialSubKind::allocator");
+ case SpecialSubKind::basic_string:
+ return printStr("SpecialSubKind::basic_string");
+ case SpecialSubKind::string:
+ return printStr("SpecialSubKind::string");
+ case SpecialSubKind::istream:
+ return printStr("SpecialSubKind::istream");
+ case SpecialSubKind::ostream:
+ return printStr("SpecialSubKind::ostream");
+ case SpecialSubKind::iostream:
+ return printStr("SpecialSubKind::iostream");
+ }
+ }
+ void print(TemplateParamKind TPK) {
+ switch (TPK) {
+ case TemplateParamKind::Type:
+ return printStr("TemplateParamKind::Type");
+ case TemplateParamKind::NonType:
+ return printStr("TemplateParamKind::NonType");
+ case TemplateParamKind::Template:
+ return printStr("TemplateParamKind::Template");
+ }
+ }
+
+ void newLine() {
+ printStr("\n");
+ for (unsigned I = 0; I != Depth; ++I)
+ printStr(" ");
+ PendingNewline = false;
+ }
+
+ template<typename T> void printWithPendingNewline(T V) {
+ print(V);
+ if (wantsNewline(V))
+ PendingNewline = true;
+ }
+
+ template<typename T> void printWithComma(T V) {
+ if (PendingNewline || wantsNewline(V)) {
+ printStr(",");
+ newLine();
+ } else {
+ printStr(", ");
+ }
+
+ printWithPendingNewline(V);
+ }
+
+ struct CtorArgPrinter {
+ DumpVisitor &Visitor;
+
+ template<typename T, typename ...Rest> void operator()(T V, Rest ...Vs) {
+ if (Visitor.anyWantNewline(V, Vs...))
+ Visitor.newLine();
+ Visitor.printWithPendingNewline(V);
+ int PrintInOrder[] = { (Visitor.printWithComma(Vs), 0)..., 0 };
+ (void)PrintInOrder;
+ }
+ };
+
+ template<typename NodeT> void operator()(const NodeT *Node) {
+ Depth += 2;
+ fprintf(stderr, "%s(", itanium_demangle::NodeKind<NodeT>::name());
+ Node->match(CtorArgPrinter{*this});
+ fprintf(stderr, ")");
+ Depth -= 2;
+ }
+
+ void operator()(const ForwardTemplateReference *Node) {
+ Depth += 2;
+ fprintf(stderr, "ForwardTemplateReference(");
+ if (Node->Ref && !Node->Printing) {
+ Node->Printing = true;
+ CtorArgPrinter{*this}(Node->Ref);
+ Node->Printing = false;
+ } else {
+ CtorArgPrinter{*this}(Node->Index);
+ }
+ fprintf(stderr, ")");
+ Depth -= 2;
+ }
+};
+}
+
+void itanium_demangle::Node::dump() const {
+ DumpVisitor V;
+ visit(std::ref(V));
+ V.newLine();
+}
+#endif
+
+namespace {
+class BumpPointerAllocator {
+ struct BlockMeta {
+ BlockMeta* Next;
+ size_t Current;
+ };
+
+ static constexpr size_t AllocSize = 4096;
+ static constexpr size_t UsableAllocSize = AllocSize - sizeof(BlockMeta);
+
+ alignas(long double) char InitialBuffer[AllocSize];
+ BlockMeta* BlockList = nullptr;
+
+ void grow() {
+ char* NewMeta = static_cast<char *>(std::malloc(AllocSize));
+ if (NewMeta == nullptr)
+ std::terminate();
+ BlockList = new (NewMeta) BlockMeta{BlockList, 0};
+ }
+
+ void* allocateMassive(size_t NBytes) {
+ NBytes += sizeof(BlockMeta);
+ BlockMeta* NewMeta = reinterpret_cast<BlockMeta*>(std::malloc(NBytes));
+ if (NewMeta == nullptr)
+ std::terminate();
+ BlockList->Next = new (NewMeta) BlockMeta{BlockList->Next, 0};
+ return static_cast<void*>(NewMeta + 1);
+ }
+
+public:
+ BumpPointerAllocator()
+ : BlockList(new (InitialBuffer) BlockMeta{nullptr, 0}) {}
+
+ void* allocate(size_t N) {
+ N = (N + 15u) & ~15u;
+ if (N + BlockList->Current >= UsableAllocSize) {
+ if (N > UsableAllocSize)
+ return allocateMassive(N);
+ grow();
+ }
+ BlockList->Current += N;
+ return static_cast<void*>(reinterpret_cast<char*>(BlockList + 1) +
+ BlockList->Current - N);
+ }
+
+ void reset() {
+ while (BlockList) {
+ BlockMeta* Tmp = BlockList;
+ BlockList = BlockList->Next;
+ if (reinterpret_cast<char*>(Tmp) != InitialBuffer)
+ std::free(Tmp);
+ }
+ BlockList = new (InitialBuffer) BlockMeta{nullptr, 0};
+ }
+
+ ~BumpPointerAllocator() { reset(); }
+};
+
+class DefaultAllocator {
+ BumpPointerAllocator Alloc;
+
+public:
+ void reset() { Alloc.reset(); }
+
+ template<typename T, typename ...Args> T *makeNode(Args &&...args) {
+ return new (Alloc.allocate(sizeof(T)))
+ T(std::forward<Args>(args)...);
+ }
+
+ void *allocateNodeArray(size_t sz) {
+ return Alloc.allocate(sizeof(Node *) * sz);
+ }
+};
+} // unnamed namespace
+
+//===----------------------------------------------------------------------===//
+// Code beyond this point should not be synchronized with libc++abi.
+//===----------------------------------------------------------------------===//
+
+using Demangler = itanium_demangle::ManglingParser<DefaultAllocator>;
+
+char *llvm::itaniumDemangle(const char *MangledName, char *Buf,
+ size_t *N, int *Status) {
+ if (MangledName == nullptr || (Buf != nullptr && N == nullptr)) {
+ if (Status)
+ *Status = demangle_invalid_args;
+ return nullptr;
+ }
+
+ int InternalStatus = demangle_success;
+ Demangler Parser(MangledName, MangledName + std::strlen(MangledName));
+ OutputStream S;
+
+ Node *AST = Parser.parse();
+
+ if (AST == nullptr)
+ InternalStatus = demangle_invalid_mangled_name;
+ else if (!initializeOutputStream(Buf, N, S, 1024))
+ InternalStatus = demangle_memory_alloc_failure;
+ else {
+ assert(Parser.ForwardTemplateRefs.empty());
+ AST->print(S);
+ S += '\0';
+ if (N != nullptr)
+ *N = S.getCurrentPosition();
+ Buf = S.getBuffer();
+ }
+
+ if (Status)
+ *Status = InternalStatus;
+ return InternalStatus == demangle_success ? Buf : nullptr;
+}
+
+ItaniumPartialDemangler::ItaniumPartialDemangler()
+ : RootNode(nullptr), Context(new Demangler{nullptr, nullptr}) {}
+
+ItaniumPartialDemangler::~ItaniumPartialDemangler() {
+ delete static_cast<Demangler *>(Context);
+}
+
+ItaniumPartialDemangler::ItaniumPartialDemangler(
+ ItaniumPartialDemangler &&Other)
+ : RootNode(Other.RootNode), Context(Other.Context) {
+ Other.Context = Other.RootNode = nullptr;
+}
+
+ItaniumPartialDemangler &ItaniumPartialDemangler::
+operator=(ItaniumPartialDemangler &&Other) {
+ std::swap(RootNode, Other.RootNode);
+ std::swap(Context, Other.Context);
+ return *this;
+}
+
+// Demangle MangledName into an AST, storing it into this->RootNode.
+bool ItaniumPartialDemangler::partialDemangle(const char *MangledName) {
+ Demangler *Parser = static_cast<Demangler *>(Context);
+ size_t Len = std::strlen(MangledName);
+ Parser->reset(MangledName, MangledName + Len);
+ RootNode = Parser->parse();
+ return RootNode == nullptr;
+}
+
+static char *printNode(const Node *RootNode, char *Buf, size_t *N) {
+ OutputStream S;
+ if (!initializeOutputStream(Buf, N, S, 128))
+ return nullptr;
+ RootNode->print(S);
+ S += '\0';
+ if (N != nullptr)
+ *N = S.getCurrentPosition();
+ return S.getBuffer();
+}
+
+char *ItaniumPartialDemangler::getFunctionBaseName(char *Buf, size_t *N) const {
+ if (!isFunction())
+ return nullptr;
+
+ const Node *Name = static_cast<const FunctionEncoding *>(RootNode)->getName();
+
+ while (true) {
+ switch (Name->getKind()) {
+ case Node::KAbiTagAttr:
+ Name = static_cast<const AbiTagAttr *>(Name)->Base;
+ continue;
+ case Node::KStdQualifiedName:
+ Name = static_cast<const StdQualifiedName *>(Name)->Child;
+ continue;
+ case Node::KNestedName:
+ Name = static_cast<const NestedName *>(Name)->Name;
+ continue;
+ case Node::KLocalName:
+ Name = static_cast<const LocalName *>(Name)->Entity;
+ continue;
+ case Node::KNameWithTemplateArgs:
+ Name = static_cast<const NameWithTemplateArgs *>(Name)->Name;
+ continue;
+ default:
+ return printNode(Name, Buf, N);
+ }
+ }
+}
+
+char *ItaniumPartialDemangler::getFunctionDeclContextName(char *Buf,
+ size_t *N) const {
+ if (!isFunction())
+ return nullptr;
+ const Node *Name = static_cast<const FunctionEncoding *>(RootNode)->getName();
+
+ OutputStream S;
+ if (!initializeOutputStream(Buf, N, S, 128))
+ return nullptr;
+
+ KeepGoingLocalFunction:
+ while (true) {
+ if (Name->getKind() == Node::KAbiTagAttr) {
+ Name = static_cast<const AbiTagAttr *>(Name)->Base;
+ continue;
+ }
+ if (Name->getKind() == Node::KNameWithTemplateArgs) {
+ Name = static_cast<const NameWithTemplateArgs *>(Name)->Name;
+ continue;
+ }
+ break;
+ }
+
+ switch (Name->getKind()) {
+ case Node::KStdQualifiedName:
+ S += "std";
+ break;
+ case Node::KNestedName:
+ static_cast<const NestedName *>(Name)->Qual->print(S);
+ break;
+ case Node::KLocalName: {
+ auto *LN = static_cast<const LocalName *>(Name);
+ LN->Encoding->print(S);
+ S += "::";
+ Name = LN->Entity;
+ goto KeepGoingLocalFunction;
+ }
+ default:
+ break;
+ }
+ S += '\0';
+ if (N != nullptr)
+ *N = S.getCurrentPosition();
+ return S.getBuffer();
+}
+
+char *ItaniumPartialDemangler::getFunctionName(char *Buf, size_t *N) const {
+ if (!isFunction())
+ return nullptr;
+ auto *Name = static_cast<FunctionEncoding *>(RootNode)->getName();
+ return printNode(Name, Buf, N);
+}
+
+char *ItaniumPartialDemangler::getFunctionParameters(char *Buf,
+ size_t *N) const {
+ if (!isFunction())
+ return nullptr;
+ NodeArray Params = static_cast<FunctionEncoding *>(RootNode)->getParams();
+
+ OutputStream S;
+ if (!initializeOutputStream(Buf, N, S, 128))
+ return nullptr;
+
+ S += '(';
+ Params.printWithComma(S);
+ S += ')';
+ S += '\0';
+ if (N != nullptr)
+ *N = S.getCurrentPosition();
+ return S.getBuffer();
+}
+
+char *ItaniumPartialDemangler::getFunctionReturnType(
+ char *Buf, size_t *N) const {
+ if (!isFunction())
+ return nullptr;
+
+ OutputStream S;
+ if (!initializeOutputStream(Buf, N, S, 128))
+ return nullptr;
+
+ if (const Node *Ret =
+ static_cast<const FunctionEncoding *>(RootNode)->getReturnType())
+ Ret->print(S);
+
+ S += '\0';
+ if (N != nullptr)
+ *N = S.getCurrentPosition();
+ return S.getBuffer();
+}
+
+char *ItaniumPartialDemangler::finishDemangle(char *Buf, size_t *N) const {
+ assert(RootNode != nullptr && "must call partialDemangle()");
+ return printNode(static_cast<Node *>(RootNode), Buf, N);
+}
+
+bool ItaniumPartialDemangler::hasFunctionQualifiers() const {
+ assert(RootNode != nullptr && "must call partialDemangle()");
+ if (!isFunction())
+ return false;
+ auto *E = static_cast<const FunctionEncoding *>(RootNode);
+ return E->getCVQuals() != QualNone || E->getRefQual() != FrefQualNone;
+}
+
+bool ItaniumPartialDemangler::isCtorOrDtor() const {
+ const Node *N = static_cast<const Node *>(RootNode);
+ while (N) {
+ switch (N->getKind()) {
+ default:
+ return false;
+ case Node::KCtorDtorName:
+ return true;
+
+ case Node::KAbiTagAttr:
+ N = static_cast<const AbiTagAttr *>(N)->Base;
+ break;
+ case Node::KFunctionEncoding:
+ N = static_cast<const FunctionEncoding *>(N)->getName();
+ break;
+ case Node::KLocalName:
+ N = static_cast<const LocalName *>(N)->Entity;
+ break;
+ case Node::KNameWithTemplateArgs:
+ N = static_cast<const NameWithTemplateArgs *>(N)->Name;
+ break;
+ case Node::KNestedName:
+ N = static_cast<const NestedName *>(N)->Name;
+ break;
+ case Node::KStdQualifiedName:
+ N = static_cast<const StdQualifiedName *>(N)->Child;
+ break;
+ }
+ }
+ return false;
+}
+
+bool ItaniumPartialDemangler::isFunction() const {
+ assert(RootNode != nullptr && "must call partialDemangle()");
+ return static_cast<const Node *>(RootNode)->getKind() ==
+ Node::KFunctionEncoding;
+}
+
+bool ItaniumPartialDemangler::isSpecialName() const {
+ assert(RootNode != nullptr && "must call partialDemangle()");
+ auto K = static_cast<const Node *>(RootNode)->getKind();
+ return K == Node::KSpecialName || K == Node::KCtorVtableSpecialName;
+}
+
+bool ItaniumPartialDemangler::isData() const {
+ return !isFunction() && !isSpecialName();
+}
diff --git a/externals/demangle/ItaniumDemangle.h b/externals/demangle/ItaniumDemangle.h
new file mode 100644
index 000000000..64b35c142
--- /dev/null
+++ b/externals/demangle/ItaniumDemangle.h
@@ -0,0 +1,5582 @@
+//===------------------------- ItaniumDemangle.h ----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-FileCopyrightText: Part of the LLVM Project
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Generic itanium demangler library. This file has two byte-per-byte identical
+// copies in the source tree, one in libcxxabi, and the other in llvm.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DEMANGLE_ITANIUMDEMANGLE_H
+#define DEMANGLE_ITANIUMDEMANGLE_H
+
+// FIXME: (possibly) incomplete list of features that clang mangles that this
+// file does not yet support:
+// - C++ modules TS
+
+#include "DemangleConfig.h"
+#include "StringView.h"
+#include "Utility.h"
+#include <cassert>
+#include <cctype>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <numeric>
+#include <utility>
+
+#define FOR_EACH_NODE_KIND(X) \
+ X(NodeArrayNode) \
+ X(DotSuffix) \
+ X(VendorExtQualType) \
+ X(QualType) \
+ X(ConversionOperatorType) \
+ X(PostfixQualifiedType) \
+ X(ElaboratedTypeSpefType) \
+ X(NameType) \
+ X(AbiTagAttr) \
+ X(EnableIfAttr) \
+ X(ObjCProtoName) \
+ X(PointerType) \
+ X(ReferenceType) \
+ X(PointerToMemberType) \
+ X(ArrayType) \
+ X(FunctionType) \
+ X(NoexceptSpec) \
+ X(DynamicExceptionSpec) \
+ X(FunctionEncoding) \
+ X(LiteralOperator) \
+ X(SpecialName) \
+ X(CtorVtableSpecialName) \
+ X(QualifiedName) \
+ X(NestedName) \
+ X(LocalName) \
+ X(VectorType) \
+ X(PixelVectorType) \
+ X(SyntheticTemplateParamName) \
+ X(TypeTemplateParamDecl) \
+ X(NonTypeTemplateParamDecl) \
+ X(TemplateTemplateParamDecl) \
+ X(TemplateParamPackDecl) \
+ X(ParameterPack) \
+ X(TemplateArgumentPack) \
+ X(ParameterPackExpansion) \
+ X(TemplateArgs) \
+ X(ForwardTemplateReference) \
+ X(NameWithTemplateArgs) \
+ X(GlobalQualifiedName) \
+ X(StdQualifiedName) \
+ X(ExpandedSpecialSubstitution) \
+ X(SpecialSubstitution) \
+ X(CtorDtorName) \
+ X(DtorName) \
+ X(UnnamedTypeName) \
+ X(ClosureTypeName) \
+ X(StructuredBindingName) \
+ X(BinaryExpr) \
+ X(ArraySubscriptExpr) \
+ X(PostfixExpr) \
+ X(ConditionalExpr) \
+ X(MemberExpr) \
+ X(EnclosingExpr) \
+ X(CastExpr) \
+ X(SizeofParamPackExpr) \
+ X(CallExpr) \
+ X(NewExpr) \
+ X(DeleteExpr) \
+ X(PrefixExpr) \
+ X(FunctionParam) \
+ X(ConversionExpr) \
+ X(InitListExpr) \
+ X(FoldExpr) \
+ X(ThrowExpr) \
+ X(UUIDOfExpr) \
+ X(BoolExpr) \
+ X(StringLiteral) \
+ X(LambdaExpr) \
+ X(IntegerCastExpr) \
+ X(IntegerLiteral) \
+ X(FloatLiteral) \
+ X(DoubleLiteral) \
+ X(LongDoubleLiteral) \
+ X(BracedExpr) \
+ X(BracedRangeExpr)
+
+DEMANGLE_NAMESPACE_BEGIN
+
+// Base class of all AST nodes. The AST is built by the parser, then is
+// traversed by the printLeft/Right functions to produce a demangled string.
+class Node {
+public:
+ enum Kind : unsigned char {
+#define ENUMERATOR(NodeKind) K ## NodeKind,
+ FOR_EACH_NODE_KIND(ENUMERATOR)
+#undef ENUMERATOR
+ };
+
+ /// Three-way bool to track a cached value. Unknown is possible if this node
+ /// has an unexpanded parameter pack below it that may affect this cache.
+ enum class Cache : unsigned char { Yes, No, Unknown, };
+
+private:
+ Kind K;
+
+ // FIXME: Make these protected.
+public:
+ /// Tracks if this node has a component on its right side, in which case we
+ /// need to call printRight.
+ Cache RHSComponentCache;
+
+ /// Track if this node is a (possibly qualified) array type. This can affect
+ /// how we format the output string.
+ Cache ArrayCache;
+
+ /// Track if this node is a (possibly qualified) function type. This can
+ /// affect how we format the output string.
+ Cache FunctionCache;
+
+public:
+ Node(Kind K_, Cache RHSComponentCache_ = Cache::No,
+ Cache ArrayCache_ = Cache::No, Cache FunctionCache_ = Cache::No)
+ : K(K_), RHSComponentCache(RHSComponentCache_), ArrayCache(ArrayCache_),
+ FunctionCache(FunctionCache_) {}
+
+ /// Visit the most-derived object corresponding to this object.
+ template<typename Fn> void visit(Fn F) const;
+
+ // The following function is provided by all derived classes:
+ //
+ // Call F with arguments that, when passed to the constructor of this node,
+ // would construct an equivalent node.
+ //template<typename Fn> void match(Fn F) const;
+
+ bool hasRHSComponent(OutputStream &S) const {
+ if (RHSComponentCache != Cache::Unknown)
+ return RHSComponentCache == Cache::Yes;
+ return hasRHSComponentSlow(S);
+ }
+
+ bool hasArray(OutputStream &S) const {
+ if (ArrayCache != Cache::Unknown)
+ return ArrayCache == Cache::Yes;
+ return hasArraySlow(S);
+ }
+
+ bool hasFunction(OutputStream &S) const {
+ if (FunctionCache != Cache::Unknown)
+ return FunctionCache == Cache::Yes;
+ return hasFunctionSlow(S);
+ }
+
+ Kind getKind() const { return K; }
+
+ virtual bool hasRHSComponentSlow(OutputStream &) const { return false; }
+ virtual bool hasArraySlow(OutputStream &) const { return false; }
+ virtual bool hasFunctionSlow(OutputStream &) const { return false; }
+
+ // Dig through "glue" nodes like ParameterPack and ForwardTemplateReference to
+ // get at a node that actually represents some concrete syntax.
+ virtual const Node *getSyntaxNode(OutputStream &) const {
+ return this;
+ }
+
+ void print(OutputStream &S) const {
+ printLeft(S);
+ if (RHSComponentCache != Cache::No)
+ printRight(S);
+ }
+
+ // Print the "left" side of this Node into OutputStream.
+ virtual void printLeft(OutputStream &) const = 0;
+
+ // Print the "right". This distinction is necessary to represent C++ types
+ // that appear on the RHS of their subtype, such as arrays or functions.
+ // Since most types don't have such a component, provide a default
+ // implementation.
+ virtual void printRight(OutputStream &) const {}
+
+ virtual StringView getBaseName() const { return StringView(); }
+
+ // Silence compiler warnings, this dtor will never be called.
+ virtual ~Node() = default;
+
+#ifndef NDEBUG
+ DEMANGLE_DUMP_METHOD void dump() const;
+#endif
+};
+
+class NodeArray {
+ Node **Elements;
+ size_t NumElements;
+
+public:
+ NodeArray() : Elements(nullptr), NumElements(0) {}
+ NodeArray(Node **Elements_, size_t NumElements_)
+ : Elements(Elements_), NumElements(NumElements_) {}
+
+ bool empty() const { return NumElements == 0; }
+ size_t size() const { return NumElements; }
+
+ Node **begin() const { return Elements; }
+ Node **end() const { return Elements + NumElements; }
+
+ Node *operator[](size_t Idx) const { return Elements[Idx]; }
+
+ void printWithComma(OutputStream &S) const {
+ bool FirstElement = true;
+ for (size_t Idx = 0; Idx != NumElements; ++Idx) {
+ size_t BeforeComma = S.getCurrentPosition();
+ if (!FirstElement)
+ S += ", ";
+ size_t AfterComma = S.getCurrentPosition();
+ Elements[Idx]->print(S);
+
+ // Elements[Idx] is an empty parameter pack expansion, we should erase the
+ // comma we just printed.
+ if (AfterComma == S.getCurrentPosition()) {
+ S.setCurrentPosition(BeforeComma);
+ continue;
+ }
+
+ FirstElement = false;
+ }
+ }
+};
+
+struct NodeArrayNode : Node {
+ NodeArray Array;
+ NodeArrayNode(NodeArray Array_) : Node(KNodeArrayNode), Array(Array_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Array); }
+
+ void printLeft(OutputStream &S) const override {
+ Array.printWithComma(S);
+ }
+};
+
+class DotSuffix final : public Node {
+ const Node *Prefix;
+ const StringView Suffix;
+
+public:
+ DotSuffix(const Node *Prefix_, StringView Suffix_)
+ : Node(KDotSuffix), Prefix(Prefix_), Suffix(Suffix_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Prefix, Suffix); }
+
+ void printLeft(OutputStream &s) const override {
+ Prefix->print(s);
+ s += " (";
+ s += Suffix;
+ s += ")";
+ }
+};
+
+class VendorExtQualType final : public Node {
+ const Node *Ty;
+ StringView Ext;
+
+public:
+ VendorExtQualType(const Node *Ty_, StringView Ext_)
+ : Node(KVendorExtQualType), Ty(Ty_), Ext(Ext_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Ext); }
+
+ void printLeft(OutputStream &S) const override {
+ Ty->print(S);
+ S += " ";
+ S += Ext;
+ }
+};
+
+enum FunctionRefQual : unsigned char {
+ FrefQualNone,
+ FrefQualLValue,
+ FrefQualRValue,
+};
+
+enum Qualifiers {
+ QualNone = 0,
+ QualConst = 0x1,
+ QualVolatile = 0x2,
+ QualRestrict = 0x4,
+};
+
+inline Qualifiers operator|=(Qualifiers &Q1, Qualifiers Q2) {
+ return Q1 = static_cast<Qualifiers>(Q1 | Q2);
+}
+
+class QualType final : public Node {
+protected:
+ const Qualifiers Quals;
+ const Node *Child;
+
+ void printQuals(OutputStream &S) const {
+ if (Quals & QualConst)
+ S += " const";
+ if (Quals & QualVolatile)
+ S += " volatile";
+ if (Quals & QualRestrict)
+ S += " restrict";
+ }
+
+public:
+ QualType(const Node *Child_, Qualifiers Quals_)
+ : Node(KQualType, Child_->RHSComponentCache,
+ Child_->ArrayCache, Child_->FunctionCache),
+ Quals(Quals_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child, Quals); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return Child->hasRHSComponent(S);
+ }
+ bool hasArraySlow(OutputStream &S) const override {
+ return Child->hasArray(S);
+ }
+ bool hasFunctionSlow(OutputStream &S) const override {
+ return Child->hasFunction(S);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ Child->printLeft(S);
+ printQuals(S);
+ }
+
+ void printRight(OutputStream &S) const override { Child->printRight(S); }
+};
+
+class ConversionOperatorType final : public Node {
+ const Node *Ty;
+
+public:
+ ConversionOperatorType(const Node *Ty_)
+ : Node(KConversionOperatorType), Ty(Ty_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "operator ";
+ Ty->print(S);
+ }
+};
+
+class PostfixQualifiedType final : public Node {
+ const Node *Ty;
+ const StringView Postfix;
+
+public:
+ PostfixQualifiedType(Node *Ty_, StringView Postfix_)
+ : Node(KPostfixQualifiedType), Ty(Ty_), Postfix(Postfix_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Postfix); }
+
+ void printLeft(OutputStream &s) const override {
+ Ty->printLeft(s);
+ s += Postfix;
+ }
+};
+
+class NameType final : public Node {
+ const StringView Name;
+
+public:
+ NameType(StringView Name_) : Node(KNameType), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name); }
+
+ StringView getName() const { return Name; }
+ StringView getBaseName() const override { return Name; }
+
+ void printLeft(OutputStream &s) const override { s += Name; }
+};
+
+class ElaboratedTypeSpefType : public Node {
+ StringView Kind;
+ Node *Child;
+public:
+ ElaboratedTypeSpefType(StringView Kind_, Node *Child_)
+ : Node(KElaboratedTypeSpefType), Kind(Kind_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Kind, Child); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Kind;
+ S += ' ';
+ Child->print(S);
+ }
+};
+
+struct AbiTagAttr : Node {
+ Node *Base;
+ StringView Tag;
+
+ AbiTagAttr(Node* Base_, StringView Tag_)
+ : Node(KAbiTagAttr, Base_->RHSComponentCache,
+ Base_->ArrayCache, Base_->FunctionCache),
+ Base(Base_), Tag(Tag_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Base, Tag); }
+
+ void printLeft(OutputStream &S) const override {
+ Base->printLeft(S);
+ S += "[abi:";
+ S += Tag;
+ S += "]";
+ }
+};
+
+class EnableIfAttr : public Node {
+ NodeArray Conditions;
+public:
+ EnableIfAttr(NodeArray Conditions_)
+ : Node(KEnableIfAttr), Conditions(Conditions_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Conditions); }
+
+ void printLeft(OutputStream &S) const override {
+ S += " [enable_if:";
+ Conditions.printWithComma(S);
+ S += ']';
+ }
+};
+
+class ObjCProtoName : public Node {
+ const Node *Ty;
+ StringView Protocol;
+
+ friend class PointerType;
+
+public:
+ ObjCProtoName(const Node *Ty_, StringView Protocol_)
+ : Node(KObjCProtoName), Ty(Ty_), Protocol(Protocol_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Protocol); }
+
+ bool isObjCObject() const {
+ return Ty->getKind() == KNameType &&
+ static_cast<const NameType *>(Ty)->getName() == "objc_object";
+ }
+
+ void printLeft(OutputStream &S) const override {
+ Ty->print(S);
+ S += "<";
+ S += Protocol;
+ S += ">";
+ }
+};
+
+class PointerType final : public Node {
+ const Node *Pointee;
+
+public:
+ PointerType(const Node *Pointee_)
+ : Node(KPointerType, Pointee_->RHSComponentCache),
+ Pointee(Pointee_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Pointee); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return Pointee->hasRHSComponent(S);
+ }
+
+ void printLeft(OutputStream &s) const override {
+ // We rewrite objc_object<SomeProtocol>* into id<SomeProtocol>.
+ if (Pointee->getKind() != KObjCProtoName ||
+ !static_cast<const ObjCProtoName *>(Pointee)->isObjCObject()) {
+ Pointee->printLeft(s);
+ if (Pointee->hasArray(s))
+ s += " ";
+ if (Pointee->hasArray(s) || Pointee->hasFunction(s))
+ s += "(";
+ s += "*";
+ } else {
+ const auto *objcProto = static_cast<const ObjCProtoName *>(Pointee);
+ s += "id<";
+ s += objcProto->Protocol;
+ s += ">";
+ }
+ }
+
+ void printRight(OutputStream &s) const override {
+ if (Pointee->getKind() != KObjCProtoName ||
+ !static_cast<const ObjCProtoName *>(Pointee)->isObjCObject()) {
+ if (Pointee->hasArray(s) || Pointee->hasFunction(s))
+ s += ")";
+ Pointee->printRight(s);
+ }
+ }
+};
+
+enum class ReferenceKind {
+ LValue,
+ RValue,
+};
+
+// Represents either a LValue or an RValue reference type.
+class ReferenceType : public Node {
+ const Node *Pointee;
+ ReferenceKind RK;
+
+ mutable bool Printing = false;
+
+ // Dig through any refs to refs, collapsing the ReferenceTypes as we go. The
+ // rule here is rvalue ref to rvalue ref collapses to a rvalue ref, and any
+ // other combination collapses to a lvalue ref.
+ std::pair<ReferenceKind, const Node *> collapse(OutputStream &S) const {
+ auto SoFar = std::make_pair(RK, Pointee);
+ for (;;) {
+ const Node *SN = SoFar.second->getSyntaxNode(S);
+ if (SN->getKind() != KReferenceType)
+ break;
+ auto *RT = static_cast<const ReferenceType *>(SN);
+ SoFar.second = RT->Pointee;
+ SoFar.first = std::min(SoFar.first, RT->RK);
+ }
+ return SoFar;
+ }
+
+public:
+ ReferenceType(const Node *Pointee_, ReferenceKind RK_)
+ : Node(KReferenceType, Pointee_->RHSComponentCache),
+ Pointee(Pointee_), RK(RK_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Pointee, RK); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return Pointee->hasRHSComponent(S);
+ }
+
+ void printLeft(OutputStream &s) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ std::pair<ReferenceKind, const Node *> Collapsed = collapse(s);
+ Collapsed.second->printLeft(s);
+ if (Collapsed.second->hasArray(s))
+ s += " ";
+ if (Collapsed.second->hasArray(s) || Collapsed.second->hasFunction(s))
+ s += "(";
+
+ s += (Collapsed.first == ReferenceKind::LValue ? "&" : "&&");
+ }
+ void printRight(OutputStream &s) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ std::pair<ReferenceKind, const Node *> Collapsed = collapse(s);
+ if (Collapsed.second->hasArray(s) || Collapsed.second->hasFunction(s))
+ s += ")";
+ Collapsed.second->printRight(s);
+ }
+};
+
+class PointerToMemberType final : public Node {
+ const Node *ClassType;
+ const Node *MemberType;
+
+public:
+ PointerToMemberType(const Node *ClassType_, const Node *MemberType_)
+ : Node(KPointerToMemberType, MemberType_->RHSComponentCache),
+ ClassType(ClassType_), MemberType(MemberType_) {}
+
+ template<typename Fn> void match(Fn F) const { F(ClassType, MemberType); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return MemberType->hasRHSComponent(S);
+ }
+
+ void printLeft(OutputStream &s) const override {
+ MemberType->printLeft(s);
+ if (MemberType->hasArray(s) || MemberType->hasFunction(s))
+ s += "(";
+ else
+ s += " ";
+ ClassType->print(s);
+ s += "::*";
+ }
+
+ void printRight(OutputStream &s) const override {
+ if (MemberType->hasArray(s) || MemberType->hasFunction(s))
+ s += ")";
+ MemberType->printRight(s);
+ }
+};
+
+class NodeOrString {
+ const void *First;
+ const void *Second;
+
+public:
+ /* implicit */ NodeOrString(StringView Str) {
+ const char *FirstChar = Str.begin();
+ const char *SecondChar = Str.end();
+ if (SecondChar == nullptr) {
+ assert(FirstChar == SecondChar);
+ ++FirstChar, ++SecondChar;
+ }
+ First = static_cast<const void *>(FirstChar);
+ Second = static_cast<const void *>(SecondChar);
+ }
+
+ /* implicit */ NodeOrString(Node *N)
+ : First(static_cast<const void *>(N)), Second(nullptr) {}
+ NodeOrString() : First(nullptr), Second(nullptr) {}
+
+ bool isString() const { return Second && First; }
+ bool isNode() const { return First && !Second; }
+ bool isEmpty() const { return !First && !Second; }
+
+ StringView asString() const {
+ assert(isString());
+ return StringView(static_cast<const char *>(First),
+ static_cast<const char *>(Second));
+ }
+
+ const Node *asNode() const {
+ assert(isNode());
+ return static_cast<const Node *>(First);
+ }
+};
+
+class ArrayType final : public Node {
+ const Node *Base;
+ NodeOrString Dimension;
+
+public:
+ ArrayType(const Node *Base_, NodeOrString Dimension_)
+ : Node(KArrayType,
+ /*RHSComponentCache=*/Cache::Yes,
+ /*ArrayCache=*/Cache::Yes),
+ Base(Base_), Dimension(Dimension_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Base, Dimension); }
+
+ bool hasRHSComponentSlow(OutputStream &) const override { return true; }
+ bool hasArraySlow(OutputStream &) const override { return true; }
+
+ void printLeft(OutputStream &S) const override { Base->printLeft(S); }
+
+ void printRight(OutputStream &S) const override {
+ if (S.back() != ']')
+ S += " ";
+ S += "[";
+ if (Dimension.isString())
+ S += Dimension.asString();
+ else if (Dimension.isNode())
+ Dimension.asNode()->print(S);
+ S += "]";
+ Base->printRight(S);
+ }
+};
+
+class FunctionType final : public Node {
+ const Node *Ret;
+ NodeArray Params;
+ Qualifiers CVQuals;
+ FunctionRefQual RefQual;
+ const Node *ExceptionSpec;
+
+public:
+ FunctionType(const Node *Ret_, NodeArray Params_, Qualifiers CVQuals_,
+ FunctionRefQual RefQual_, const Node *ExceptionSpec_)
+ : Node(KFunctionType,
+ /*RHSComponentCache=*/Cache::Yes, /*ArrayCache=*/Cache::No,
+ /*FunctionCache=*/Cache::Yes),
+ Ret(Ret_), Params(Params_), CVQuals(CVQuals_), RefQual(RefQual_),
+ ExceptionSpec(ExceptionSpec_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(Ret, Params, CVQuals, RefQual, ExceptionSpec);
+ }
+
+ bool hasRHSComponentSlow(OutputStream &) const override { return true; }
+ bool hasFunctionSlow(OutputStream &) const override { return true; }
+
+ // Handle C++'s ... quirky decl grammar by using the left & right
+ // distinction. Consider:
+ // int (*f(float))(char) {}
+ // f is a function that takes a float and returns a pointer to a function
+ // that takes a char and returns an int. If we're trying to print f, start
+ // by printing out the return types's left, then print our parameters, then
+ // finally print right of the return type.
+ void printLeft(OutputStream &S) const override {
+ Ret->printLeft(S);
+ S += " ";
+ }
+
+ void printRight(OutputStream &S) const override {
+ S += "(";
+ Params.printWithComma(S);
+ S += ")";
+ Ret->printRight(S);
+
+ if (CVQuals & QualConst)
+ S += " const";
+ if (CVQuals & QualVolatile)
+ S += " volatile";
+ if (CVQuals & QualRestrict)
+ S += " restrict";
+
+ if (RefQual == FrefQualLValue)
+ S += " &";
+ else if (RefQual == FrefQualRValue)
+ S += " &&";
+
+ if (ExceptionSpec != nullptr) {
+ S += ' ';
+ ExceptionSpec->print(S);
+ }
+ }
+};
+
+class NoexceptSpec : public Node {
+ const Node *E;
+public:
+ NoexceptSpec(const Node *E_) : Node(KNoexceptSpec), E(E_) {}
+
+ template<typename Fn> void match(Fn F) const { F(E); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "noexcept(";
+ E->print(S);
+ S += ")";
+ }
+};
+
+class DynamicExceptionSpec : public Node {
+ NodeArray Types;
+public:
+ DynamicExceptionSpec(NodeArray Types_)
+ : Node(KDynamicExceptionSpec), Types(Types_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Types); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "throw(";
+ Types.printWithComma(S);
+ S += ')';
+ }
+};
+
+class FunctionEncoding final : public Node {
+ const Node *Ret;
+ const Node *Name;
+ NodeArray Params;
+ const Node *Attrs;
+ Qualifiers CVQuals;
+ FunctionRefQual RefQual;
+
+public:
+ FunctionEncoding(const Node *Ret_, const Node *Name_, NodeArray Params_,
+ const Node *Attrs_, Qualifiers CVQuals_,
+ FunctionRefQual RefQual_)
+ : Node(KFunctionEncoding,
+ /*RHSComponentCache=*/Cache::Yes, /*ArrayCache=*/Cache::No,
+ /*FunctionCache=*/Cache::Yes),
+ Ret(Ret_), Name(Name_), Params(Params_), Attrs(Attrs_),
+ CVQuals(CVQuals_), RefQual(RefQual_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(Ret, Name, Params, Attrs, CVQuals, RefQual);
+ }
+
+ Qualifiers getCVQuals() const { return CVQuals; }
+ FunctionRefQual getRefQual() const { return RefQual; }
+ NodeArray getParams() const { return Params; }
+ const Node *getReturnType() const { return Ret; }
+
+ bool hasRHSComponentSlow(OutputStream &) const override { return true; }
+ bool hasFunctionSlow(OutputStream &) const override { return true; }
+
+ const Node *getName() const { return Name; }
+
+ void printLeft(OutputStream &S) const override {
+ if (Ret) {
+ Ret->printLeft(S);
+ if (!Ret->hasRHSComponent(S))
+ S += " ";
+ }
+ Name->print(S);
+ }
+
+ void printRight(OutputStream &S) const override {
+ S += "(";
+ Params.printWithComma(S);
+ S += ")";
+ if (Ret)
+ Ret->printRight(S);
+
+ if (CVQuals & QualConst)
+ S += " const";
+ if (CVQuals & QualVolatile)
+ S += " volatile";
+ if (CVQuals & QualRestrict)
+ S += " restrict";
+
+ if (RefQual == FrefQualLValue)
+ S += " &";
+ else if (RefQual == FrefQualRValue)
+ S += " &&";
+
+ if (Attrs != nullptr)
+ Attrs->print(S);
+ }
+};
+
+class LiteralOperator : public Node {
+ const Node *OpName;
+
+public:
+ LiteralOperator(const Node *OpName_)
+ : Node(KLiteralOperator), OpName(OpName_) {}
+
+ template<typename Fn> void match(Fn F) const { F(OpName); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "operator\"\" ";
+ OpName->print(S);
+ }
+};
+
+class SpecialName final : public Node {
+ const StringView Special;
+ const Node *Child;
+
+public:
+ SpecialName(StringView Special_, const Node *Child_)
+ : Node(KSpecialName), Special(Special_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Special, Child); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Special;
+ Child->print(S);
+ }
+};
+
+class CtorVtableSpecialName final : public Node {
+ const Node *FirstType;
+ const Node *SecondType;
+
+public:
+ CtorVtableSpecialName(const Node *FirstType_, const Node *SecondType_)
+ : Node(KCtorVtableSpecialName),
+ FirstType(FirstType_), SecondType(SecondType_) {}
+
+ template<typename Fn> void match(Fn F) const { F(FirstType, SecondType); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "construction vtable for ";
+ FirstType->print(S);
+ S += "-in-";
+ SecondType->print(S);
+ }
+};
+
+struct NestedName : Node {
+ Node *Qual;
+ Node *Name;
+
+ NestedName(Node *Qual_, Node *Name_)
+ : Node(KNestedName), Qual(Qual_), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Qual, Name); }
+
+ StringView getBaseName() const override { return Name->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ Qual->print(S);
+ S += "::";
+ Name->print(S);
+ }
+};
+
+struct LocalName : Node {
+ Node *Encoding;
+ Node *Entity;
+
+ LocalName(Node *Encoding_, Node *Entity_)
+ : Node(KLocalName), Encoding(Encoding_), Entity(Entity_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Encoding, Entity); }
+
+ void printLeft(OutputStream &S) const override {
+ Encoding->print(S);
+ S += "::";
+ Entity->print(S);
+ }
+};
+
+class QualifiedName final : public Node {
+ // qualifier::name
+ const Node *Qualifier;
+ const Node *Name;
+
+public:
+ QualifiedName(const Node *Qualifier_, const Node *Name_)
+ : Node(KQualifiedName), Qualifier(Qualifier_), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Qualifier, Name); }
+
+ StringView getBaseName() const override { return Name->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ Qualifier->print(S);
+ S += "::";
+ Name->print(S);
+ }
+};
+
+class VectorType final : public Node {
+ const Node *BaseType;
+ const NodeOrString Dimension;
+
+public:
+ VectorType(const Node *BaseType_, NodeOrString Dimension_)
+ : Node(KVectorType), BaseType(BaseType_),
+ Dimension(Dimension_) {}
+
+ template<typename Fn> void match(Fn F) const { F(BaseType, Dimension); }
+
+ void printLeft(OutputStream &S) const override {
+ BaseType->print(S);
+ S += " vector[";
+ if (Dimension.isNode())
+ Dimension.asNode()->print(S);
+ else if (Dimension.isString())
+ S += Dimension.asString();
+ S += "]";
+ }
+};
+
+class PixelVectorType final : public Node {
+ const NodeOrString Dimension;
+
+public:
+ PixelVectorType(NodeOrString Dimension_)
+ : Node(KPixelVectorType), Dimension(Dimension_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Dimension); }
+
+ void printLeft(OutputStream &S) const override {
+ // FIXME: This should demangle as "vector pixel".
+ S += "pixel vector[";
+ S += Dimension.asString();
+ S += "]";
+ }
+};
+
+enum class TemplateParamKind { Type, NonType, Template };
+
+/// An invented name for a template parameter for which we don't have a
+/// corresponding template argument.
+///
+/// This node is created when parsing the <lambda-sig> for a lambda with
+/// explicit template arguments, which might be referenced in the parameter
+/// types appearing later in the <lambda-sig>.
+class SyntheticTemplateParamName final : public Node {
+ TemplateParamKind Kind;
+ unsigned Index;
+
+public:
+ SyntheticTemplateParamName(TemplateParamKind Kind_, unsigned Index_)
+ : Node(KSyntheticTemplateParamName), Kind(Kind_), Index(Index_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Kind, Index); }
+
+ void printLeft(OutputStream &S) const override {
+ switch (Kind) {
+ case TemplateParamKind::Type:
+ S += "$T";
+ break;
+ case TemplateParamKind::NonType:
+ S += "$N";
+ break;
+ case TemplateParamKind::Template:
+ S += "$TT";
+ break;
+ }
+ if (Index > 0)
+ S << Index - 1;
+ }
+};
+
+/// A template type parameter declaration, 'typename T'.
+class TypeTemplateParamDecl final : public Node {
+ Node *Name;
+
+public:
+ TypeTemplateParamDecl(Node *Name_)
+ : Node(KTypeTemplateParamDecl, Cache::Yes), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "typename ";
+ }
+
+ void printRight(OutputStream &S) const override {
+ Name->print(S);
+ }
+};
+
+/// A non-type template parameter declaration, 'int N'.
+class NonTypeTemplateParamDecl final : public Node {
+ Node *Name;
+ Node *Type;
+
+public:
+ NonTypeTemplateParamDecl(Node *Name_, Node *Type_)
+ : Node(KNonTypeTemplateParamDecl, Cache::Yes), Name(Name_), Type(Type_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name, Type); }
+
+ void printLeft(OutputStream &S) const override {
+ Type->printLeft(S);
+ if (!Type->hasRHSComponent(S))
+ S += " ";
+ }
+
+ void printRight(OutputStream &S) const override {
+ Name->print(S);
+ Type->printRight(S);
+ }
+};
+
+/// A template template parameter declaration,
+/// 'template<typename T> typename N'.
+class TemplateTemplateParamDecl final : public Node {
+ Node *Name;
+ NodeArray Params;
+
+public:
+ TemplateTemplateParamDecl(Node *Name_, NodeArray Params_)
+ : Node(KTemplateTemplateParamDecl, Cache::Yes), Name(Name_),
+ Params(Params_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name, Params); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "template<";
+ Params.printWithComma(S);
+ S += "> typename ";
+ }
+
+ void printRight(OutputStream &S) const override {
+ Name->print(S);
+ }
+};
+
+/// A template parameter pack declaration, 'typename ...T'.
+class TemplateParamPackDecl final : public Node {
+ Node *Param;
+
+public:
+ TemplateParamPackDecl(Node *Param_)
+ : Node(KTemplateParamPackDecl, Cache::Yes), Param(Param_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Param); }
+
+ void printLeft(OutputStream &S) const override {
+ Param->printLeft(S);
+ S += "...";
+ }
+
+ void printRight(OutputStream &S) const override {
+ Param->printRight(S);
+ }
+};
+
+/// An unexpanded parameter pack (either in the expression or type context). If
+/// this AST is correct, this node will have a ParameterPackExpansion node above
+/// it.
+///
+/// This node is created when some <template-args> are found that apply to an
+/// <encoding>, and is stored in the TemplateParams table. In order for this to
+/// appear in the final AST, it has to referenced via a <template-param> (ie,
+/// T_).
+class ParameterPack final : public Node {
+ NodeArray Data;
+
+ // Setup OutputStream for a pack expansion unless we're already expanding one.
+ void initializePackExpansion(OutputStream &S) const {
+ if (S.CurrentPackMax == std::numeric_limits<unsigned>::max()) {
+ S.CurrentPackMax = static_cast<unsigned>(Data.size());
+ S.CurrentPackIndex = 0;
+ }
+ }
+
+public:
+ ParameterPack(NodeArray Data_) : Node(KParameterPack), Data(Data_) {
+ ArrayCache = FunctionCache = RHSComponentCache = Cache::Unknown;
+ if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
+ return P->ArrayCache == Cache::No;
+ }))
+ ArrayCache = Cache::No;
+ if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
+ return P->FunctionCache == Cache::No;
+ }))
+ FunctionCache = Cache::No;
+ if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
+ return P->RHSComponentCache == Cache::No;
+ }))
+ RHSComponentCache = Cache::No;
+ }
+
+ template<typename Fn> void match(Fn F) const { F(Data); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() && Data[Idx]->hasRHSComponent(S);
+ }
+ bool hasArraySlow(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() && Data[Idx]->hasArray(S);
+ }
+ bool hasFunctionSlow(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() && Data[Idx]->hasFunction(S);
+ }
+ const Node *getSyntaxNode(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() ? Data[Idx]->getSyntaxNode(S) : this;
+ }
+
+ void printLeft(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ if (Idx < Data.size())
+ Data[Idx]->printLeft(S);
+ }
+ void printRight(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ if (Idx < Data.size())
+ Data[Idx]->printRight(S);
+ }
+};
+
+/// A variadic template argument. This node represents an occurrence of
+/// J<something>E in some <template-args>. It isn't itself unexpanded, unless
+/// one of it's Elements is. The parser inserts a ParameterPack into the
+/// TemplateParams table if the <template-args> this pack belongs to apply to an
+/// <encoding>.
+class TemplateArgumentPack final : public Node {
+ NodeArray Elements;
+public:
+ TemplateArgumentPack(NodeArray Elements_)
+ : Node(KTemplateArgumentPack), Elements(Elements_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Elements); }
+
+ NodeArray getElements() const { return Elements; }
+
+ void printLeft(OutputStream &S) const override {
+ Elements.printWithComma(S);
+ }
+};
+
+/// A pack expansion. Below this node, there are some unexpanded ParameterPacks
+/// which each have Child->ParameterPackSize elements.
+class ParameterPackExpansion final : public Node {
+ const Node *Child;
+
+public:
+ ParameterPackExpansion(const Node *Child_)
+ : Node(KParameterPackExpansion), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child); }
+
+ const Node *getChild() const { return Child; }
+
+ void printLeft(OutputStream &S) const override {
+ constexpr unsigned Max = std::numeric_limits<unsigned>::max();
+ SwapAndRestore<unsigned> SavePackIdx(S.CurrentPackIndex, Max);
+ SwapAndRestore<unsigned> SavePackMax(S.CurrentPackMax, Max);
+ size_t StreamPos = S.getCurrentPosition();
+
+ // Print the first element in the pack. If Child contains a ParameterPack,
+ // it will set up S.CurrentPackMax and print the first element.
+ Child->print(S);
+
+ // No ParameterPack was found in Child. This can occur if we've found a pack
+ // expansion on a <function-param>.
+ if (S.CurrentPackMax == Max) {
+ S += "...";
+ return;
+ }
+
+ // We found a ParameterPack, but it has no elements. Erase whatever we may
+ // of printed.
+ if (S.CurrentPackMax == 0) {
+ S.setCurrentPosition(StreamPos);
+ return;
+ }
+
+ // Else, iterate through the rest of the elements in the pack.
+ for (unsigned I = 1, E = S.CurrentPackMax; I < E; ++I) {
+ S += ", ";
+ S.CurrentPackIndex = I;
+ Child->print(S);
+ }
+ }
+};
+
+class TemplateArgs final : public Node {
+ NodeArray Params;
+
+public:
+ TemplateArgs(NodeArray Params_) : Node(KTemplateArgs), Params(Params_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Params); }
+
+ NodeArray getParams() { return Params; }
+
+ void printLeft(OutputStream &S) const override {
+ S += "<";
+ Params.printWithComma(S);
+ if (S.back() == '>')
+ S += " ";
+ S += ">";
+ }
+};
+
+/// A forward-reference to a template argument that was not known at the point
+/// where the template parameter name was parsed in a mangling.
+///
+/// This is created when demangling the name of a specialization of a
+/// conversion function template:
+///
+/// \code
+/// struct A {
+/// template<typename T> operator T*();
+/// };
+/// \endcode
+///
+/// When demangling a specialization of the conversion function template, we
+/// encounter the name of the template (including the \c T) before we reach
+/// the template argument list, so we cannot substitute the parameter name
+/// for the corresponding argument while parsing. Instead, we create a
+/// \c ForwardTemplateReference node that is resolved after we parse the
+/// template arguments.
+struct ForwardTemplateReference : Node {
+ size_t Index;
+ Node *Ref = nullptr;
+
+ // If we're currently printing this node. It is possible (though invalid) for
+ // a forward template reference to refer to itself via a substitution. This
+ // creates a cyclic AST, which will stack overflow printing. To fix this, bail
+ // out if more than one print* function is active.
+ mutable bool Printing = false;
+
+ ForwardTemplateReference(size_t Index_)
+ : Node(KForwardTemplateReference, Cache::Unknown, Cache::Unknown,
+ Cache::Unknown),
+ Index(Index_) {}
+
+ // We don't provide a matcher for these, because the value of the node is
+ // not determined by its construction parameters, and it generally needs
+ // special handling.
+ template<typename Fn> void match(Fn F) const = delete;
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ if (Printing)
+ return false;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->hasRHSComponent(S);
+ }
+ bool hasArraySlow(OutputStream &S) const override {
+ if (Printing)
+ return false;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->hasArray(S);
+ }
+ bool hasFunctionSlow(OutputStream &S) const override {
+ if (Printing)
+ return false;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->hasFunction(S);
+ }
+ const Node *getSyntaxNode(OutputStream &S) const override {
+ if (Printing)
+ return this;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->getSyntaxNode(S);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ Ref->printLeft(S);
+ }
+ void printRight(OutputStream &S) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ Ref->printRight(S);
+ }
+};
+
+struct NameWithTemplateArgs : Node {
+ // name<template_args>
+ Node *Name;
+ Node *TemplateArgs;
+
+ NameWithTemplateArgs(Node *Name_, Node *TemplateArgs_)
+ : Node(KNameWithTemplateArgs), Name(Name_), TemplateArgs(TemplateArgs_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name, TemplateArgs); }
+
+ StringView getBaseName() const override { return Name->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ Name->print(S);
+ TemplateArgs->print(S);
+ }
+};
+
+class GlobalQualifiedName final : public Node {
+ Node *Child;
+
+public:
+ GlobalQualifiedName(Node* Child_)
+ : Node(KGlobalQualifiedName), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child); }
+
+ StringView getBaseName() const override { return Child->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "::";
+ Child->print(S);
+ }
+};
+
+struct StdQualifiedName : Node {
+ Node *Child;
+
+ StdQualifiedName(Node *Child_) : Node(KStdQualifiedName), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child); }
+
+ StringView getBaseName() const override { return Child->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "std::";
+ Child->print(S);
+ }
+};
+
+enum class SpecialSubKind {
+ allocator,
+ basic_string,
+ string,
+ istream,
+ ostream,
+ iostream,
+};
+
+class ExpandedSpecialSubstitution final : public Node {
+ SpecialSubKind SSK;
+
+public:
+ ExpandedSpecialSubstitution(SpecialSubKind SSK_)
+ : Node(KExpandedSpecialSubstitution), SSK(SSK_) {}
+
+ template<typename Fn> void match(Fn F) const { F(SSK); }
+
+ StringView getBaseName() const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ return StringView("allocator");
+ case SpecialSubKind::basic_string:
+ return StringView("basic_string");
+ case SpecialSubKind::string:
+ return StringView("basic_string");
+ case SpecialSubKind::istream:
+ return StringView("basic_istream");
+ case SpecialSubKind::ostream:
+ return StringView("basic_ostream");
+ case SpecialSubKind::iostream:
+ return StringView("basic_iostream");
+ }
+ DEMANGLE_UNREACHABLE;
+ }
+
+ void printLeft(OutputStream &S) const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ S += "std::allocator";
+ break;
+ case SpecialSubKind::basic_string:
+ S += "std::basic_string";
+ break;
+ case SpecialSubKind::string:
+ S += "std::basic_string<char, std::char_traits<char>, "
+ "std::allocator<char> >";
+ break;
+ case SpecialSubKind::istream:
+ S += "std::basic_istream<char, std::char_traits<char> >";
+ break;
+ case SpecialSubKind::ostream:
+ S += "std::basic_ostream<char, std::char_traits<char> >";
+ break;
+ case SpecialSubKind::iostream:
+ S += "std::basic_iostream<char, std::char_traits<char> >";
+ break;
+ }
+ }
+};
+
+class SpecialSubstitution final : public Node {
+public:
+ SpecialSubKind SSK;
+
+ SpecialSubstitution(SpecialSubKind SSK_)
+ : Node(KSpecialSubstitution), SSK(SSK_) {}
+
+ template<typename Fn> void match(Fn F) const { F(SSK); }
+
+ StringView getBaseName() const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ return StringView("allocator");
+ case SpecialSubKind::basic_string:
+ return StringView("basic_string");
+ case SpecialSubKind::string:
+ return StringView("string");
+ case SpecialSubKind::istream:
+ return StringView("istream");
+ case SpecialSubKind::ostream:
+ return StringView("ostream");
+ case SpecialSubKind::iostream:
+ return StringView("iostream");
+ }
+ DEMANGLE_UNREACHABLE;
+ }
+
+ void printLeft(OutputStream &S) const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ S += "std::allocator";
+ break;
+ case SpecialSubKind::basic_string:
+ S += "std::basic_string";
+ break;
+ case SpecialSubKind::string:
+ S += "std::string";
+ break;
+ case SpecialSubKind::istream:
+ S += "std::istream";
+ break;
+ case SpecialSubKind::ostream:
+ S += "std::ostream";
+ break;
+ case SpecialSubKind::iostream:
+ S += "std::iostream";
+ break;
+ }
+ }
+};
+
+class CtorDtorName final : public Node {
+ const Node *Basename;
+ const bool IsDtor;
+ const int Variant;
+
+public:
+ CtorDtorName(const Node *Basename_, bool IsDtor_, int Variant_)
+ : Node(KCtorDtorName), Basename(Basename_), IsDtor(IsDtor_),
+ Variant(Variant_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Basename, IsDtor, Variant); }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsDtor)
+ S += "~";
+ S += Basename->getBaseName();
+ }
+};
+
+class DtorName : public Node {
+ const Node *Base;
+
+public:
+ DtorName(const Node *Base_) : Node(KDtorName), Base(Base_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Base); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "~";
+ Base->printLeft(S);
+ }
+};
+
+class UnnamedTypeName : public Node {
+ const StringView Count;
+
+public:
+ UnnamedTypeName(StringView Count_) : Node(KUnnamedTypeName), Count(Count_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Count); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "'unnamed";
+ S += Count;
+ S += "\'";
+ }
+};
+
+class ClosureTypeName : public Node {
+ NodeArray TemplateParams;
+ NodeArray Params;
+ StringView Count;
+
+public:
+ ClosureTypeName(NodeArray TemplateParams_, NodeArray Params_,
+ StringView Count_)
+ : Node(KClosureTypeName), TemplateParams(TemplateParams_),
+ Params(Params_), Count(Count_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(TemplateParams, Params, Count);
+ }
+
+ void printDeclarator(OutputStream &S) const {
+ if (!TemplateParams.empty()) {
+ S += "<";
+ TemplateParams.printWithComma(S);
+ S += ">";
+ }
+ S += "(";
+ Params.printWithComma(S);
+ S += ")";
+ }
+
+ void printLeft(OutputStream &S) const override {
+ S += "\'lambda";
+ S += Count;
+ S += "\'";
+ printDeclarator(S);
+ }
+};
+
+class StructuredBindingName : public Node {
+ NodeArray Bindings;
+public:
+ StructuredBindingName(NodeArray Bindings_)
+ : Node(KStructuredBindingName), Bindings(Bindings_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Bindings); }
+
+ void printLeft(OutputStream &S) const override {
+ S += '[';
+ Bindings.printWithComma(S);
+ S += ']';
+ }
+};
+
+// -- Expression Nodes --
+
+class BinaryExpr : public Node {
+ const Node *LHS;
+ const StringView InfixOperator;
+ const Node *RHS;
+
+public:
+ BinaryExpr(const Node *LHS_, StringView InfixOperator_, const Node *RHS_)
+ : Node(KBinaryExpr), LHS(LHS_), InfixOperator(InfixOperator_), RHS(RHS_) {
+ }
+
+ template<typename Fn> void match(Fn F) const { F(LHS, InfixOperator, RHS); }
+
+ void printLeft(OutputStream &S) const override {
+ // might be a template argument expression, then we need to disambiguate
+ // with parens.
+ if (InfixOperator == ">")
+ S += "(";
+
+ S += "(";
+ LHS->print(S);
+ S += ") ";
+ S += InfixOperator;
+ S += " (";
+ RHS->print(S);
+ S += ")";
+
+ if (InfixOperator == ">")
+ S += ")";
+ }
+};
+
+class ArraySubscriptExpr : public Node {
+ const Node *Op1;
+ const Node *Op2;
+
+public:
+ ArraySubscriptExpr(const Node *Op1_, const Node *Op2_)
+ : Node(KArraySubscriptExpr), Op1(Op1_), Op2(Op2_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Op1, Op2); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Op1->print(S);
+ S += ")[";
+ Op2->print(S);
+ S += "]";
+ }
+};
+
+class PostfixExpr : public Node {
+ const Node *Child;
+ const StringView Operator;
+
+public:
+ PostfixExpr(const Node *Child_, StringView Operator_)
+ : Node(KPostfixExpr), Child(Child_), Operator(Operator_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child, Operator); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Child->print(S);
+ S += ")";
+ S += Operator;
+ }
+};
+
+class ConditionalExpr : public Node {
+ const Node *Cond;
+ const Node *Then;
+ const Node *Else;
+
+public:
+ ConditionalExpr(const Node *Cond_, const Node *Then_, const Node *Else_)
+ : Node(KConditionalExpr), Cond(Cond_), Then(Then_), Else(Else_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Cond, Then, Else); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Cond->print(S);
+ S += ") ? (";
+ Then->print(S);
+ S += ") : (";
+ Else->print(S);
+ S += ")";
+ }
+};
+
+class MemberExpr : public Node {
+ const Node *LHS;
+ const StringView Kind;
+ const Node *RHS;
+
+public:
+ MemberExpr(const Node *LHS_, StringView Kind_, const Node *RHS_)
+ : Node(KMemberExpr), LHS(LHS_), Kind(Kind_), RHS(RHS_) {}
+
+ template<typename Fn> void match(Fn F) const { F(LHS, Kind, RHS); }
+
+ void printLeft(OutputStream &S) const override {
+ LHS->print(S);
+ S += Kind;
+ RHS->print(S);
+ }
+};
+
+class EnclosingExpr : public Node {
+ const StringView Prefix;
+ const Node *Infix;
+ const StringView Postfix;
+
+public:
+ EnclosingExpr(StringView Prefix_, Node *Infix_, StringView Postfix_)
+ : Node(KEnclosingExpr), Prefix(Prefix_), Infix(Infix_),
+ Postfix(Postfix_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Prefix, Infix, Postfix); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Prefix;
+ Infix->print(S);
+ S += Postfix;
+ }
+};
+
+class CastExpr : public Node {
+ // cast_kind<to>(from)
+ const StringView CastKind;
+ const Node *To;
+ const Node *From;
+
+public:
+ CastExpr(StringView CastKind_, const Node *To_, const Node *From_)
+ : Node(KCastExpr), CastKind(CastKind_), To(To_), From(From_) {}
+
+ template<typename Fn> void match(Fn F) const { F(CastKind, To, From); }
+
+ void printLeft(OutputStream &S) const override {
+ S += CastKind;
+ S += "<";
+ To->printLeft(S);
+ S += ">(";
+ From->printLeft(S);
+ S += ")";
+ }
+};
+
+class SizeofParamPackExpr : public Node {
+ const Node *Pack;
+
+public:
+ SizeofParamPackExpr(const Node *Pack_)
+ : Node(KSizeofParamPackExpr), Pack(Pack_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Pack); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "sizeof...(";
+ ParameterPackExpansion PPE(Pack);
+ PPE.printLeft(S);
+ S += ")";
+ }
+};
+
+class CallExpr : public Node {
+ const Node *Callee;
+ NodeArray Args;
+
+public:
+ CallExpr(const Node *Callee_, NodeArray Args_)
+ : Node(KCallExpr), Callee(Callee_), Args(Args_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Callee, Args); }
+
+ void printLeft(OutputStream &S) const override {
+ Callee->print(S);
+ S += "(";
+ Args.printWithComma(S);
+ S += ")";
+ }
+};
+
+class NewExpr : public Node {
+ // new (expr_list) type(init_list)
+ NodeArray ExprList;
+ Node *Type;
+ NodeArray InitList;
+ bool IsGlobal; // ::operator new ?
+ bool IsArray; // new[] ?
+public:
+ NewExpr(NodeArray ExprList_, Node *Type_, NodeArray InitList_, bool IsGlobal_,
+ bool IsArray_)
+ : Node(KNewExpr), ExprList(ExprList_), Type(Type_), InitList(InitList_),
+ IsGlobal(IsGlobal_), IsArray(IsArray_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(ExprList, Type, InitList, IsGlobal, IsArray);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsGlobal)
+ S += "::operator ";
+ S += "new";
+ if (IsArray)
+ S += "[]";
+ S += ' ';
+ if (!ExprList.empty()) {
+ S += "(";
+ ExprList.printWithComma(S);
+ S += ")";
+ }
+ Type->print(S);
+ if (!InitList.empty()) {
+ S += "(";
+ InitList.printWithComma(S);
+ S += ")";
+ }
+
+ }
+};
+
+class DeleteExpr : public Node {
+ Node *Op;
+ bool IsGlobal;
+ bool IsArray;
+
+public:
+ DeleteExpr(Node *Op_, bool IsGlobal_, bool IsArray_)
+ : Node(KDeleteExpr), Op(Op_), IsGlobal(IsGlobal_), IsArray(IsArray_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Op, IsGlobal, IsArray); }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsGlobal)
+ S += "::";
+ S += "delete";
+ if (IsArray)
+ S += "[] ";
+ Op->print(S);
+ }
+};
+
+class PrefixExpr : public Node {
+ StringView Prefix;
+ Node *Child;
+
+public:
+ PrefixExpr(StringView Prefix_, Node *Child_)
+ : Node(KPrefixExpr), Prefix(Prefix_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Prefix, Child); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Prefix;
+ S += "(";
+ Child->print(S);
+ S += ")";
+ }
+};
+
+class FunctionParam : public Node {
+ StringView Number;
+
+public:
+ FunctionParam(StringView Number_) : Node(KFunctionParam), Number(Number_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Number); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "fp";
+ S += Number;
+ }
+};
+
+class ConversionExpr : public Node {
+ const Node *Type;
+ NodeArray Expressions;
+
+public:
+ ConversionExpr(const Node *Type_, NodeArray Expressions_)
+ : Node(KConversionExpr), Type(Type_), Expressions(Expressions_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Type, Expressions); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Type->print(S);
+ S += ")(";
+ Expressions.printWithComma(S);
+ S += ")";
+ }
+};
+
+class InitListExpr : public Node {
+ const Node *Ty;
+ NodeArray Inits;
+public:
+ InitListExpr(const Node *Ty_, NodeArray Inits_)
+ : Node(KInitListExpr), Ty(Ty_), Inits(Inits_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Inits); }
+
+ void printLeft(OutputStream &S) const override {
+ if (Ty)
+ Ty->print(S);
+ S += '{';
+ Inits.printWithComma(S);
+ S += '}';
+ }
+};
+
+class BracedExpr : public Node {
+ const Node *Elem;
+ const Node *Init;
+ bool IsArray;
+public:
+ BracedExpr(const Node *Elem_, const Node *Init_, bool IsArray_)
+ : Node(KBracedExpr), Elem(Elem_), Init(Init_), IsArray(IsArray_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Elem, Init, IsArray); }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsArray) {
+ S += '[';
+ Elem->print(S);
+ S += ']';
+ } else {
+ S += '.';
+ Elem->print(S);
+ }
+ if (Init->getKind() != KBracedExpr && Init->getKind() != KBracedRangeExpr)
+ S += " = ";
+ Init->print(S);
+ }
+};
+
+class BracedRangeExpr : public Node {
+ const Node *First;
+ const Node *Last;
+ const Node *Init;
+public:
+ BracedRangeExpr(const Node *First_, const Node *Last_, const Node *Init_)
+ : Node(KBracedRangeExpr), First(First_), Last(Last_), Init(Init_) {}
+
+ template<typename Fn> void match(Fn F) const { F(First, Last, Init); }
+
+ void printLeft(OutputStream &S) const override {
+ S += '[';
+ First->print(S);
+ S += " ... ";
+ Last->print(S);
+ S += ']';
+ if (Init->getKind() != KBracedExpr && Init->getKind() != KBracedRangeExpr)
+ S += " = ";
+ Init->print(S);
+ }
+};
+
+class FoldExpr : public Node {
+ const Node *Pack, *Init;
+ StringView OperatorName;
+ bool IsLeftFold;
+
+public:
+ FoldExpr(bool IsLeftFold_, StringView OperatorName_, const Node *Pack_,
+ const Node *Init_)
+ : Node(KFoldExpr), Pack(Pack_), Init(Init_), OperatorName(OperatorName_),
+ IsLeftFold(IsLeftFold_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(IsLeftFold, OperatorName, Pack, Init);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ auto PrintPack = [&] {
+ S += '(';
+ ParameterPackExpansion(Pack).print(S);
+ S += ')';
+ };
+
+ S += '(';
+
+ if (IsLeftFold) {
+ // init op ... op pack
+ if (Init != nullptr) {
+ Init->print(S);
+ S += ' ';
+ S += OperatorName;
+ S += ' ';
+ }
+ // ... op pack
+ S += "... ";
+ S += OperatorName;
+ S += ' ';
+ PrintPack();
+ } else { // !IsLeftFold
+ // pack op ...
+ PrintPack();
+ S += ' ';
+ S += OperatorName;
+ S += " ...";
+ // pack op ... op init
+ if (Init != nullptr) {
+ S += ' ';
+ S += OperatorName;
+ S += ' ';
+ Init->print(S);
+ }
+ }
+ S += ')';
+ }
+};
+
+class ThrowExpr : public Node {
+ const Node *Op;
+
+public:
+ ThrowExpr(const Node *Op_) : Node(KThrowExpr), Op(Op_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Op); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "throw ";
+ Op->print(S);
+ }
+};
+
+// MSVC __uuidof extension, generated by clang in -fms-extensions mode.
+class UUIDOfExpr : public Node {
+ Node *Operand;
+public:
+ UUIDOfExpr(Node *Operand_) : Node(KUUIDOfExpr), Operand(Operand_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Operand); }
+
+ void printLeft(OutputStream &S) const override {
+ S << "__uuidof(";
+ Operand->print(S);
+ S << ")";
+ }
+};
+
+class BoolExpr : public Node {
+ bool Value;
+
+public:
+ BoolExpr(bool Value_) : Node(KBoolExpr), Value(Value_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Value); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Value ? StringView("true") : StringView("false");
+ }
+};
+
+class StringLiteral : public Node {
+ const Node *Type;
+
+public:
+ StringLiteral(const Node *Type_) : Node(KStringLiteral), Type(Type_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Type); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "\"<";
+ Type->print(S);
+ S += ">\"";
+ }
+};
+
+class LambdaExpr : public Node {
+ const Node *Type;
+
+public:
+ LambdaExpr(const Node *Type_) : Node(KLambdaExpr), Type(Type_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Type); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "[]";
+ if (Type->getKind() == KClosureTypeName)
+ static_cast<const ClosureTypeName *>(Type)->printDeclarator(S);
+ S += "{...}";
+ }
+};
+
+class IntegerCastExpr : public Node {
+ // ty(integer)
+ const Node *Ty;
+ StringView Integer;
+
+public:
+ IntegerCastExpr(const Node *Ty_, StringView Integer_)
+ : Node(KIntegerCastExpr), Ty(Ty_), Integer(Integer_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Integer); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Ty->print(S);
+ S += ")";
+ S += Integer;
+ }
+};
+
+class IntegerLiteral : public Node {
+ StringView Type;
+ StringView Value;
+
+public:
+ IntegerLiteral(StringView Type_, StringView Value_)
+ : Node(KIntegerLiteral), Type(Type_), Value(Value_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Type, Value); }
+
+ void printLeft(OutputStream &S) const override {
+ if (Type.size() > 3) {
+ S += "(";
+ S += Type;
+ S += ")";
+ }
+
+ if (Value[0] == 'n') {
+ S += "-";
+ S += Value.dropFront(1);
+ } else
+ S += Value;
+
+ if (Type.size() <= 3)
+ S += Type;
+ }
+};
+
+template <class Float> struct FloatData;
+
+namespace float_literal_impl {
+constexpr Node::Kind getFloatLiteralKind(float *) {
+ return Node::KFloatLiteral;
+}
+constexpr Node::Kind getFloatLiteralKind(double *) {
+ return Node::KDoubleLiteral;
+}
+constexpr Node::Kind getFloatLiteralKind(long double *) {
+ return Node::KLongDoubleLiteral;
+}
+}
+
+template <class Float> class FloatLiteralImpl : public Node {
+ const StringView Contents;
+
+ static constexpr Kind KindForClass =
+ float_literal_impl::getFloatLiteralKind((Float *)nullptr);
+
+public:
+ FloatLiteralImpl(StringView Contents_)
+ : Node(KindForClass), Contents(Contents_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Contents); }
+
+ void printLeft(OutputStream &s) const override {
+ const char *first = Contents.begin();
+ const char *last = Contents.end() + 1;
+
+ const size_t N = FloatData<Float>::mangled_size;
+ if (static_cast<std::size_t>(last - first) > N) {
+ last = first + N;
+ union {
+ Float value;
+ char buf[sizeof(Float)];
+ };
+ const char *t = first;
+ char *e = buf;
+ for (; t != last; ++t, ++e) {
+ unsigned d1 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
+ : static_cast<unsigned>(*t - 'a' + 10);
+ ++t;
+ unsigned d0 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
+ : static_cast<unsigned>(*t - 'a' + 10);
+ *e = static_cast<char>((d1 << 4) + d0);
+ }
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ std::reverse(buf, e);
+#endif
+ char num[FloatData<Float>::max_demangled_size] = {0};
+ int n = snprintf(num, sizeof(num), FloatData<Float>::spec, value);
+ s += StringView(num, num + n);
+ }
+ }
+};
+
+using FloatLiteral = FloatLiteralImpl<float>;
+using DoubleLiteral = FloatLiteralImpl<double>;
+using LongDoubleLiteral = FloatLiteralImpl<long double>;
+
+/// Visit the node. Calls \c F(P), where \c P is the node cast to the
+/// appropriate derived class.
+template<typename Fn>
+void Node::visit(Fn F) const {
+ switch (K) {
+#define CASE(X) case K ## X: return F(static_cast<const X*>(this));
+ FOR_EACH_NODE_KIND(CASE)
+#undef CASE
+ }
+ assert(0 && "unknown mangling node kind");
+}
+
+/// Determine the kind of a node from its type.
+template<typename NodeT> struct NodeKind;
+#define SPECIALIZATION(X) \
+ template<> struct NodeKind<X> { \
+ static constexpr Node::Kind Kind = Node::K##X; \
+ static constexpr const char *name() { return #X; } \
+ };
+FOR_EACH_NODE_KIND(SPECIALIZATION)
+#undef SPECIALIZATION
+
+#undef FOR_EACH_NODE_KIND
+
+template <class T, size_t N>
+class PODSmallVector {
+ static_assert(std::is_pod<T>::value,
+ "T is required to be a plain old data type");
+
+ T* First;
+ T* Last;
+ T* Cap;
+ T Inline[N];
+
+ bool isInline() const { return First == Inline; }
+
+ void clearInline() {
+ First = Inline;
+ Last = Inline;
+ Cap = Inline + N;
+ }
+
+ void reserve(size_t NewCap) {
+ size_t S = size();
+ if (isInline()) {
+ auto* Tmp = static_cast<T*>(std::malloc(NewCap * sizeof(T)));
+ if (Tmp == nullptr)
+ std::terminate();
+ std::copy(First, Last, Tmp);
+ First = Tmp;
+ } else {
+ First = static_cast<T*>(std::realloc(First, NewCap * sizeof(T)));
+ if (First == nullptr)
+ std::terminate();
+ }
+ Last = First + S;
+ Cap = First + NewCap;
+ }
+
+public:
+ PODSmallVector() : First(Inline), Last(First), Cap(Inline + N) {}
+
+ PODSmallVector(const PODSmallVector&) = delete;
+ PODSmallVector& operator=(const PODSmallVector&) = delete;
+
+ PODSmallVector(PODSmallVector&& Other) : PODSmallVector() {
+ if (Other.isInline()) {
+ std::copy(Other.begin(), Other.end(), First);
+ Last = First + Other.size();
+ Other.clear();
+ return;
+ }
+
+ First = Other.First;
+ Last = Other.Last;
+ Cap = Other.Cap;
+ Other.clearInline();
+ }
+
+ PODSmallVector& operator=(PODSmallVector&& Other) {
+ if (Other.isInline()) {
+ if (!isInline()) {
+ std::free(First);
+ clearInline();
+ }
+ std::copy(Other.begin(), Other.end(), First);
+ Last = First + Other.size();
+ Other.clear();
+ return *this;
+ }
+
+ if (isInline()) {
+ First = Other.First;
+ Last = Other.Last;
+ Cap = Other.Cap;
+ Other.clearInline();
+ return *this;
+ }
+
+ std::swap(First, Other.First);
+ std::swap(Last, Other.Last);
+ std::swap(Cap, Other.Cap);
+ Other.clear();
+ return *this;
+ }
+
+ void push_back(const T& Elem) {
+ if (Last == Cap)
+ reserve(size() * 2);
+ *Last++ = Elem;
+ }
+
+ void pop_back() {
+ assert(Last != First && "Popping empty vector!");
+ --Last;
+ }
+
+ void dropBack(size_t Index) {
+ assert(Index <= size() && "dropBack() can't expand!");
+ Last = First + Index;
+ }
+
+ T* begin() { return First; }
+ T* end() { return Last; }
+
+ bool empty() const { return First == Last; }
+ size_t size() const { return static_cast<size_t>(Last - First); }
+ T& back() {
+ assert(Last != First && "Calling back() on empty vector!");
+ return *(Last - 1);
+ }
+ T& operator[](size_t Index) {
+ assert(Index < size() && "Invalid access!");
+ return *(begin() + Index);
+ }
+ void clear() { Last = First; }
+
+ ~PODSmallVector() {
+ if (!isInline())
+ std::free(First);
+ }
+};
+
+template <typename Derived, typename Alloc> struct AbstractManglingParser {
+ const char *First;
+ const char *Last;
+
+ // Name stack, this is used by the parser to hold temporary names that were
+ // parsed. The parser collapses multiple names into new nodes to construct
+ // the AST. Once the parser is finished, names.size() == 1.
+ PODSmallVector<Node *, 32> Names;
+
+ // Substitution table. Itanium supports name substitutions as a means of
+ // compression. The string "S42_" refers to the 44nd entry (base-36) in this
+ // table.
+ PODSmallVector<Node *, 32> Subs;
+
+ using TemplateParamList = PODSmallVector<Node *, 8>;
+
+ class ScopedTemplateParamList {
+ AbstractManglingParser *Parser;
+ size_t OldNumTemplateParamLists;
+ TemplateParamList Params;
+
+ public:
+ ScopedTemplateParamList(AbstractManglingParser *Parser)
+ : Parser(Parser),
+ OldNumTemplateParamLists(Parser->TemplateParams.size()) {
+ Parser->TemplateParams.push_back(&Params);
+ }
+ ~ScopedTemplateParamList() {
+ assert(Parser->TemplateParams.size() >= OldNumTemplateParamLists);
+ Parser->TemplateParams.dropBack(OldNumTemplateParamLists);
+ }
+ };
+
+ // Template parameter table. Like the above, but referenced like "T42_".
+ // This has a smaller size compared to Subs and Names because it can be
+ // stored on the stack.
+ TemplateParamList OuterTemplateParams;
+
+ // Lists of template parameters indexed by template parameter depth,
+ // referenced like "TL2_4_". If nonempty, element 0 is always
+ // OuterTemplateParams; inner elements are always template parameter lists of
+ // lambda expressions. For a generic lambda with no explicit template
+ // parameter list, the corresponding parameter list pointer will be null.
+ PODSmallVector<TemplateParamList *, 4> TemplateParams;
+
+ // Set of unresolved forward <template-param> references. These can occur in a
+ // conversion operator's type, and are resolved in the enclosing <encoding>.
+ PODSmallVector<ForwardTemplateReference *, 4> ForwardTemplateRefs;
+
+ bool TryToParseTemplateArgs = true;
+ bool PermitForwardTemplateReferences = false;
+ size_t ParsingLambdaParamsAtLevel = (size_t)-1;
+
+ unsigned NumSyntheticTemplateParameters[3] = {};
+
+ Alloc ASTAllocator;
+
+ AbstractManglingParser(const char *First_, const char *Last_)
+ : First(First_), Last(Last_) {}
+
+ Derived &getDerived() { return static_cast<Derived &>(*this); }
+
+ void reset(const char *First_, const char *Last_) {
+ First = First_;
+ Last = Last_;
+ Names.clear();
+ Subs.clear();
+ TemplateParams.clear();
+ ParsingLambdaParamsAtLevel = (size_t)-1;
+ TryToParseTemplateArgs = true;
+ PermitForwardTemplateReferences = false;
+ for (int I = 0; I != 3; ++I)
+ NumSyntheticTemplateParameters[I] = 0;
+ ASTAllocator.reset();
+ }
+
+ template <class T, class... Args> Node *make(Args &&... args) {
+ return ASTAllocator.template makeNode<T>(std::forward<Args>(args)...);
+ }
+
+ template <class It> NodeArray makeNodeArray(It begin, It end) {
+ size_t sz = static_cast<size_t>(end - begin);
+ void *mem = ASTAllocator.allocateNodeArray(sz);
+ Node **data = new (mem) Node *[sz];
+ std::copy(begin, end, data);
+ return NodeArray(data, sz);
+ }
+
+ NodeArray popTrailingNodeArray(size_t FromPosition) {
+ assert(FromPosition <= Names.size());
+ NodeArray res =
+ makeNodeArray(Names.begin() + (long)FromPosition, Names.end());
+ Names.dropBack(FromPosition);
+ return res;
+ }
+
+ bool consumeIf(StringView S) {
+ if (StringView(First, Last).startsWith(S)) {
+ First += S.size();
+ return true;
+ }
+ return false;
+ }
+
+ bool consumeIf(char C) {
+ if (First != Last && *First == C) {
+ ++First;
+ return true;
+ }
+ return false;
+ }
+
+ char consume() { return First != Last ? *First++ : '\0'; }
+
+ char look(unsigned Lookahead = 0) {
+ if (static_cast<size_t>(Last - First) <= Lookahead)
+ return '\0';
+ return First[Lookahead];
+ }
+
+ size_t numLeft() const { return static_cast<size_t>(Last - First); }
+
+ StringView parseNumber(bool AllowNegative = false);
+ Qualifiers parseCVQualifiers();
+ bool parsePositiveInteger(size_t *Out);
+ StringView parseBareSourceName();
+
+ bool parseSeqId(size_t *Out);
+ Node *parseSubstitution();
+ Node *parseTemplateParam();
+ Node *parseTemplateParamDecl();
+ Node *parseTemplateArgs(bool TagTemplates = false);
+ Node *parseTemplateArg();
+
+ /// Parse the <expr> production.
+ Node *parseExpr();
+ Node *parsePrefixExpr(StringView Kind);
+ Node *parseBinaryExpr(StringView Kind);
+ Node *parseIntegerLiteral(StringView Lit);
+ Node *parseExprPrimary();
+ template <class Float> Node *parseFloatingLiteral();
+ Node *parseFunctionParam();
+ Node *parseNewExpr();
+ Node *parseConversionExpr();
+ Node *parseBracedExpr();
+ Node *parseFoldExpr();
+
+ /// Parse the <type> production.
+ Node *parseType();
+ Node *parseFunctionType();
+ Node *parseVectorType();
+ Node *parseDecltype();
+ Node *parseArrayType();
+ Node *parsePointerToMemberType();
+ Node *parseClassEnumType();
+ Node *parseQualifiedType();
+
+ Node *parseEncoding();
+ bool parseCallOffset();
+ Node *parseSpecialName();
+
+ /// Holds some extra information about a <name> that is being parsed. This
+ /// information is only pertinent if the <name> refers to an <encoding>.
+ struct NameState {
+ bool CtorDtorConversion = false;
+ bool EndsWithTemplateArgs = false;
+ Qualifiers CVQualifiers = QualNone;
+ FunctionRefQual ReferenceQualifier = FrefQualNone;
+ size_t ForwardTemplateRefsBegin;
+
+ NameState(AbstractManglingParser *Enclosing)
+ : ForwardTemplateRefsBegin(Enclosing->ForwardTemplateRefs.size()) {}
+ };
+
+ bool resolveForwardTemplateRefs(NameState &State) {
+ size_t I = State.ForwardTemplateRefsBegin;
+ size_t E = ForwardTemplateRefs.size();
+ for (; I < E; ++I) {
+ size_t Idx = ForwardTemplateRefs[I]->Index;
+ if (TemplateParams.empty() || !TemplateParams[0] ||
+ Idx >= TemplateParams[0]->size())
+ return true;
+ ForwardTemplateRefs[I]->Ref = (*TemplateParams[0])[Idx];
+ }
+ ForwardTemplateRefs.dropBack(State.ForwardTemplateRefsBegin);
+ return false;
+ }
+
+ /// Parse the <name> production>
+ Node *parseName(NameState *State = nullptr);
+ Node *parseLocalName(NameState *State);
+ Node *parseOperatorName(NameState *State);
+ Node *parseUnqualifiedName(NameState *State);
+ Node *parseUnnamedTypeName(NameState *State);
+ Node *parseSourceName(NameState *State);
+ Node *parseUnscopedName(NameState *State);
+ Node *parseNestedName(NameState *State);
+ Node *parseCtorDtorName(Node *&SoFar, NameState *State);
+
+ Node *parseAbiTags(Node *N);
+
+ /// Parse the <unresolved-name> production.
+ Node *parseUnresolvedName();
+ Node *parseSimpleId();
+ Node *parseBaseUnresolvedName();
+ Node *parseUnresolvedType();
+ Node *parseDestructorName();
+
+ /// Top-level entry point into the parser.
+ Node *parse();
+};
+
+const char* parse_discriminator(const char* first, const char* last);
+
+// <name> ::= <nested-name> // N
+// ::= <local-name> # See Scope Encoding below // Z
+// ::= <unscoped-template-name> <template-args>
+// ::= <unscoped-name>
+//
+// <unscoped-template-name> ::= <unscoped-name>
+// ::= <substitution>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseName(NameState *State) {
+ consumeIf('L'); // extension
+
+ if (look() == 'N')
+ return getDerived().parseNestedName(State);
+ if (look() == 'Z')
+ return getDerived().parseLocalName(State);
+
+ // ::= <unscoped-template-name> <template-args>
+ if (look() == 'S' && look(1) != 't') {
+ Node *S = getDerived().parseSubstitution();
+ if (S == nullptr)
+ return nullptr;
+ if (look() != 'I')
+ return nullptr;
+ Node *TA = getDerived().parseTemplateArgs(State != nullptr);
+ if (TA == nullptr)
+ return nullptr;
+ if (State) State->EndsWithTemplateArgs = true;
+ return make<NameWithTemplateArgs>(S, TA);
+ }
+
+ Node *N = getDerived().parseUnscopedName(State);
+ if (N == nullptr)
+ return nullptr;
+ // ::= <unscoped-template-name> <template-args>
+ if (look() == 'I') {
+ Subs.push_back(N);
+ Node *TA = getDerived().parseTemplateArgs(State != nullptr);
+ if (TA == nullptr)
+ return nullptr;
+ if (State) State->EndsWithTemplateArgs = true;
+ return make<NameWithTemplateArgs>(N, TA);
+ }
+ // ::= <unscoped-name>
+ return N;
+}
+
+// <local-name> := Z <function encoding> E <entity name> [<discriminator>]
+// := Z <function encoding> E s [<discriminator>]
+// := Z <function encoding> Ed [ <parameter number> ] _ <entity name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseLocalName(NameState *State) {
+ if (!consumeIf('Z'))
+ return nullptr;
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr || !consumeIf('E'))
+ return nullptr;
+
+ if (consumeIf('s')) {
+ First = parse_discriminator(First, Last);
+ auto *StringLitName = make<NameType>("string literal");
+ if (!StringLitName)
+ return nullptr;
+ return make<LocalName>(Encoding, StringLitName);
+ }
+
+ if (consumeIf('d')) {
+ parseNumber(true);
+ if (!consumeIf('_'))
+ return nullptr;
+ Node *N = getDerived().parseName(State);
+ if (N == nullptr)
+ return nullptr;
+ return make<LocalName>(Encoding, N);
+ }
+
+ Node *Entity = getDerived().parseName(State);
+ if (Entity == nullptr)
+ return nullptr;
+ First = parse_discriminator(First, Last);
+ return make<LocalName>(Encoding, Entity);
+}
+
+// <unscoped-name> ::= <unqualified-name>
+// ::= St <unqualified-name> # ::std::
+// extension ::= StL<unqualified-name>
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseUnscopedName(NameState *State) {
+ if (consumeIf("StL") || consumeIf("St")) {
+ Node *R = getDerived().parseUnqualifiedName(State);
+ if (R == nullptr)
+ return nullptr;
+ return make<StdQualifiedName>(R);
+ }
+ return getDerived().parseUnqualifiedName(State);
+}
+
+// <unqualified-name> ::= <operator-name> [abi-tags]
+// ::= <ctor-dtor-name>
+// ::= <source-name>
+// ::= <unnamed-type-name>
+// ::= DC <source-name>+ E # structured binding declaration
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseUnqualifiedName(NameState *State) {
+ // <ctor-dtor-name>s are special-cased in parseNestedName().
+ Node *Result;
+ if (look() == 'U')
+ Result = getDerived().parseUnnamedTypeName(State);
+ else if (look() >= '1' && look() <= '9')
+ Result = getDerived().parseSourceName(State);
+ else if (consumeIf("DC")) {
+ size_t BindingsBegin = Names.size();
+ do {
+ Node *Binding = getDerived().parseSourceName(State);
+ if (Binding == nullptr)
+ return nullptr;
+ Names.push_back(Binding);
+ } while (!consumeIf('E'));
+ Result = make<StructuredBindingName>(popTrailingNodeArray(BindingsBegin));
+ } else
+ Result = getDerived().parseOperatorName(State);
+ if (Result != nullptr)
+ Result = getDerived().parseAbiTags(Result);
+ return Result;
+}
+
+// <unnamed-type-name> ::= Ut [<nonnegative number>] _
+// ::= <closure-type-name>
+//
+// <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
+//
+// <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda has no parameters
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseUnnamedTypeName(NameState *State) {
+ // <template-params> refer to the innermost <template-args>. Clear out any
+ // outer args that we may have inserted into TemplateParams.
+ if (State != nullptr)
+ TemplateParams.clear();
+
+ if (consumeIf("Ut")) {
+ StringView Count = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<UnnamedTypeName>(Count);
+ }
+ if (consumeIf("Ul")) {
+ SwapAndRestore<size_t> SwapParams(ParsingLambdaParamsAtLevel,
+ TemplateParams.size());
+ ScopedTemplateParamList LambdaTemplateParams(this);
+
+ size_t ParamsBegin = Names.size();
+ while (look() == 'T' &&
+ StringView("yptn").find(look(1)) != StringView::npos) {
+ Node *T = parseTemplateParamDecl();
+ if (!T)
+ return nullptr;
+ Names.push_back(T);
+ }
+ NodeArray TempParams = popTrailingNodeArray(ParamsBegin);
+
+ // FIXME: If TempParams is empty and none of the function parameters
+ // includes 'auto', we should remove LambdaTemplateParams from the
+ // TemplateParams list. Unfortunately, we don't find out whether there are
+ // any 'auto' parameters until too late in an example such as:
+ //
+ // template<typename T> void f(
+ // decltype([](decltype([]<typename T>(T v) {}),
+ // auto) {})) {}
+ // template<typename T> void f(
+ // decltype([](decltype([]<typename T>(T w) {}),
+ // int) {})) {}
+ //
+ // Here, the type of v is at level 2 but the type of w is at level 1. We
+ // don't find this out until we encounter the type of the next parameter.
+ //
+ // However, compilers can't actually cope with the former example in
+ // practice, and it's likely to be made ill-formed in future, so we don't
+ // need to support it here.
+ //
+ // If we encounter an 'auto' in the function parameter types, we will
+ // recreate a template parameter scope for it, but any intervening lambdas
+ // will be parsed in the 'wrong' template parameter depth.
+ if (TempParams.empty())
+ TemplateParams.pop_back();
+
+ if (!consumeIf("vE")) {
+ do {
+ Node *P = getDerived().parseType();
+ if (P == nullptr)
+ return nullptr;
+ Names.push_back(P);
+ } while (!consumeIf('E'));
+ }
+ NodeArray Params = popTrailingNodeArray(ParamsBegin);
+
+ StringView Count = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<ClosureTypeName>(TempParams, Params, Count);
+ }
+ if (consumeIf("Ub")) {
+ (void)parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<NameType>("'block-literal'");
+ }
+ return nullptr;
+}
+
+// <source-name> ::= <positive length number> <identifier>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSourceName(NameState *) {
+ size_t Length = 0;
+ if (parsePositiveInteger(&Length))
+ return nullptr;
+ if (numLeft() < Length || Length == 0)
+ return nullptr;
+ StringView Name(First, First + Length);
+ First += Length;
+ if (Name.startsWith("_GLOBAL__N"))
+ return make<NameType>("(anonymous namespace)");
+ return make<NameType>(Name);
+}
+
+// <operator-name> ::= aa # &&
+// ::= ad # & (unary)
+// ::= an # &
+// ::= aN # &=
+// ::= aS # =
+// ::= cl # ()
+// ::= cm # ,
+// ::= co # ~
+// ::= cv <type> # (cast)
+// ::= da # delete[]
+// ::= de # * (unary)
+// ::= dl # delete
+// ::= dv # /
+// ::= dV # /=
+// ::= eo # ^
+// ::= eO # ^=
+// ::= eq # ==
+// ::= ge # >=
+// ::= gt # >
+// ::= ix # []
+// ::= le # <=
+// ::= li <source-name> # operator ""
+// ::= ls # <<
+// ::= lS # <<=
+// ::= lt # <
+// ::= mi # -
+// ::= mI # -=
+// ::= ml # *
+// ::= mL # *=
+// ::= mm # -- (postfix in <expression> context)
+// ::= na # new[]
+// ::= ne # !=
+// ::= ng # - (unary)
+// ::= nt # !
+// ::= nw # new
+// ::= oo # ||
+// ::= or # |
+// ::= oR # |=
+// ::= pm # ->*
+// ::= pl # +
+// ::= pL # +=
+// ::= pp # ++ (postfix in <expression> context)
+// ::= ps # + (unary)
+// ::= pt # ->
+// ::= qu # ?
+// ::= rm # %
+// ::= rM # %=
+// ::= rs # >>
+// ::= rS # >>=
+// ::= ss # <=> C++2a
+// ::= v <digit> <source-name> # vendor extended operator
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseOperatorName(NameState *State) {
+ switch (look()) {
+ case 'a':
+ switch (look(1)) {
+ case 'a':
+ First += 2;
+ return make<NameType>("operator&&");
+ case 'd':
+ case 'n':
+ First += 2;
+ return make<NameType>("operator&");
+ case 'N':
+ First += 2;
+ return make<NameType>("operator&=");
+ case 'S':
+ First += 2;
+ return make<NameType>("operator=");
+ }
+ return nullptr;
+ case 'c':
+ switch (look(1)) {
+ case 'l':
+ First += 2;
+ return make<NameType>("operator()");
+ case 'm':
+ First += 2;
+ return make<NameType>("operator,");
+ case 'o':
+ First += 2;
+ return make<NameType>("operator~");
+ // ::= cv <type> # (cast)
+ case 'v': {
+ First += 2;
+ SwapAndRestore<bool> SaveTemplate(TryToParseTemplateArgs, false);
+ // If we're parsing an encoding, State != nullptr and the conversion
+ // operators' <type> could have a <template-param> that refers to some
+ // <template-arg>s further ahead in the mangled name.
+ SwapAndRestore<bool> SavePermit(PermitForwardTemplateReferences,
+ PermitForwardTemplateReferences ||
+ State != nullptr);
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ if (State) State->CtorDtorConversion = true;
+ return make<ConversionOperatorType>(Ty);
+ }
+ }
+ return nullptr;
+ case 'd':
+ switch (look(1)) {
+ case 'a':
+ First += 2;
+ return make<NameType>("operator delete[]");
+ case 'e':
+ First += 2;
+ return make<NameType>("operator*");
+ case 'l':
+ First += 2;
+ return make<NameType>("operator delete");
+ case 'v':
+ First += 2;
+ return make<NameType>("operator/");
+ case 'V':
+ First += 2;
+ return make<NameType>("operator/=");
+ }
+ return nullptr;
+ case 'e':
+ switch (look(1)) {
+ case 'o':
+ First += 2;
+ return make<NameType>("operator^");
+ case 'O':
+ First += 2;
+ return make<NameType>("operator^=");
+ case 'q':
+ First += 2;
+ return make<NameType>("operator==");
+ }
+ return nullptr;
+ case 'g':
+ switch (look(1)) {
+ case 'e':
+ First += 2;
+ return make<NameType>("operator>=");
+ case 't':
+ First += 2;
+ return make<NameType>("operator>");
+ }
+ return nullptr;
+ case 'i':
+ if (look(1) == 'x') {
+ First += 2;
+ return make<NameType>("operator[]");
+ }
+ return nullptr;
+ case 'l':
+ switch (look(1)) {
+ case 'e':
+ First += 2;
+ return make<NameType>("operator<=");
+ // ::= li <source-name> # operator ""
+ case 'i': {
+ First += 2;
+ Node *SN = getDerived().parseSourceName(State);
+ if (SN == nullptr)
+ return nullptr;
+ return make<LiteralOperator>(SN);
+ }
+ case 's':
+ First += 2;
+ return make<NameType>("operator<<");
+ case 'S':
+ First += 2;
+ return make<NameType>("operator<<=");
+ case 't':
+ First += 2;
+ return make<NameType>("operator<");
+ }
+ return nullptr;
+ case 'm':
+ switch (look(1)) {
+ case 'i':
+ First += 2;
+ return make<NameType>("operator-");
+ case 'I':
+ First += 2;
+ return make<NameType>("operator-=");
+ case 'l':
+ First += 2;
+ return make<NameType>("operator*");
+ case 'L':
+ First += 2;
+ return make<NameType>("operator*=");
+ case 'm':
+ First += 2;
+ return make<NameType>("operator--");
+ }
+ return nullptr;
+ case 'n':
+ switch (look(1)) {
+ case 'a':
+ First += 2;
+ return make<NameType>("operator new[]");
+ case 'e':
+ First += 2;
+ return make<NameType>("operator!=");
+ case 'g':
+ First += 2;
+ return make<NameType>("operator-");
+ case 't':
+ First += 2;
+ return make<NameType>("operator!");
+ case 'w':
+ First += 2;
+ return make<NameType>("operator new");
+ }
+ return nullptr;
+ case 'o':
+ switch (look(1)) {
+ case 'o':
+ First += 2;
+ return make<NameType>("operator||");
+ case 'r':
+ First += 2;
+ return make<NameType>("operator|");
+ case 'R':
+ First += 2;
+ return make<NameType>("operator|=");
+ }
+ return nullptr;
+ case 'p':
+ switch (look(1)) {
+ case 'm':
+ First += 2;
+ return make<NameType>("operator->*");
+ case 'l':
+ First += 2;
+ return make<NameType>("operator+");
+ case 'L':
+ First += 2;
+ return make<NameType>("operator+=");
+ case 'p':
+ First += 2;
+ return make<NameType>("operator++");
+ case 's':
+ First += 2;
+ return make<NameType>("operator+");
+ case 't':
+ First += 2;
+ return make<NameType>("operator->");
+ }
+ return nullptr;
+ case 'q':
+ if (look(1) == 'u') {
+ First += 2;
+ return make<NameType>("operator?");
+ }
+ return nullptr;
+ case 'r':
+ switch (look(1)) {
+ case 'm':
+ First += 2;
+ return make<NameType>("operator%");
+ case 'M':
+ First += 2;
+ return make<NameType>("operator%=");
+ case 's':
+ First += 2;
+ return make<NameType>("operator>>");
+ case 'S':
+ First += 2;
+ return make<NameType>("operator>>=");
+ }
+ return nullptr;
+ case 's':
+ if (look(1) == 's') {
+ First += 2;
+ return make<NameType>("operator<=>");
+ }
+ return nullptr;
+ // ::= v <digit> <source-name> # vendor extended operator
+ case 'v':
+ if (std::isdigit(look(1))) {
+ First += 2;
+ Node *SN = getDerived().parseSourceName(State);
+ if (SN == nullptr)
+ return nullptr;
+ return make<ConversionOperatorType>(SN);
+ }
+ return nullptr;
+ }
+ return nullptr;
+}
+
+// <ctor-dtor-name> ::= C1 # complete object constructor
+// ::= C2 # base object constructor
+// ::= C3 # complete object allocating constructor
+// extension ::= C4 # gcc old-style "[unified]" constructor
+// extension ::= C5 # the COMDAT used for ctors
+// ::= D0 # deleting destructor
+// ::= D1 # complete object destructor
+// ::= D2 # base object destructor
+// extension ::= D4 # gcc old-style "[unified]" destructor
+// extension ::= D5 # the COMDAT used for dtors
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseCtorDtorName(Node *&SoFar,
+ NameState *State) {
+ if (SoFar->getKind() == Node::KSpecialSubstitution) {
+ auto SSK = static_cast<SpecialSubstitution *>(SoFar)->SSK;
+ switch (SSK) {
+ case SpecialSubKind::string:
+ case SpecialSubKind::istream:
+ case SpecialSubKind::ostream:
+ case SpecialSubKind::iostream:
+ SoFar = make<ExpandedSpecialSubstitution>(SSK);
+ if (!SoFar)
+ return nullptr;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (consumeIf('C')) {
+ bool IsInherited = consumeIf('I');
+ if (look() != '1' && look() != '2' && look() != '3' && look() != '4' &&
+ look() != '5')
+ return nullptr;
+ int Variant = look() - '0';
+ ++First;
+ if (State) State->CtorDtorConversion = true;
+ if (IsInherited) {
+ if (getDerived().parseName(State) == nullptr)
+ return nullptr;
+ }
+ return make<CtorDtorName>(SoFar, /*IsDtor=*/false, Variant);
+ }
+
+ if (look() == 'D' && (look(1) == '0' || look(1) == '1' || look(1) == '2' ||
+ look(1) == '4' || look(1) == '5')) {
+ int Variant = look(1) - '0';
+ First += 2;
+ if (State) State->CtorDtorConversion = true;
+ return make<CtorDtorName>(SoFar, /*IsDtor=*/true, Variant);
+ }
+
+ return nullptr;
+}
+
+// <nested-name> ::= N [<CV-Qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E
+// ::= N [<CV-Qualifiers>] [<ref-qualifier>] <template-prefix> <template-args> E
+//
+// <prefix> ::= <prefix> <unqualified-name>
+// ::= <template-prefix> <template-args>
+// ::= <template-param>
+// ::= <decltype>
+// ::= # empty
+// ::= <substitution>
+// ::= <prefix> <data-member-prefix>
+// extension ::= L
+//
+// <data-member-prefix> := <member source-name> [<template-args>] M
+//
+// <template-prefix> ::= <prefix> <template unqualified-name>
+// ::= <template-param>
+// ::= <substitution>
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseNestedName(NameState *State) {
+ if (!consumeIf('N'))
+ return nullptr;
+
+ Qualifiers CVTmp = parseCVQualifiers();
+ if (State) State->CVQualifiers = CVTmp;
+
+ if (consumeIf('O')) {
+ if (State) State->ReferenceQualifier = FrefQualRValue;
+ } else if (consumeIf('R')) {
+ if (State) State->ReferenceQualifier = FrefQualLValue;
+ } else
+ if (State) State->ReferenceQualifier = FrefQualNone;
+
+ Node *SoFar = nullptr;
+ auto PushComponent = [&](Node *Comp) {
+ if (!Comp) return false;
+ if (SoFar) SoFar = make<NestedName>(SoFar, Comp);
+ else SoFar = Comp;
+ if (State) State->EndsWithTemplateArgs = false;
+ return SoFar != nullptr;
+ };
+
+ if (consumeIf("St")) {
+ SoFar = make<NameType>("std");
+ if (!SoFar)
+ return nullptr;
+ }
+
+ while (!consumeIf('E')) {
+ consumeIf('L'); // extension
+
+ // <data-member-prefix> := <member source-name> [<template-args>] M
+ if (consumeIf('M')) {
+ if (SoFar == nullptr)
+ return nullptr;
+ continue;
+ }
+
+ // ::= <template-param>
+ if (look() == 'T') {
+ if (!PushComponent(getDerived().parseTemplateParam()))
+ return nullptr;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <template-prefix> <template-args>
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs(State != nullptr);
+ if (TA == nullptr || SoFar == nullptr)
+ return nullptr;
+ SoFar = make<NameWithTemplateArgs>(SoFar, TA);
+ if (!SoFar)
+ return nullptr;
+ if (State) State->EndsWithTemplateArgs = true;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <decltype>
+ if (look() == 'D' && (look(1) == 't' || look(1) == 'T')) {
+ if (!PushComponent(getDerived().parseDecltype()))
+ return nullptr;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <substitution>
+ if (look() == 'S' && look(1) != 't') {
+ Node *S = getDerived().parseSubstitution();
+ if (!PushComponent(S))
+ return nullptr;
+ if (SoFar != S)
+ Subs.push_back(S);
+ continue;
+ }
+
+ // Parse an <unqualified-name> thats actually a <ctor-dtor-name>.
+ if (look() == 'C' || (look() == 'D' && look(1) != 'C')) {
+ if (SoFar == nullptr)
+ return nullptr;
+ if (!PushComponent(getDerived().parseCtorDtorName(SoFar, State)))
+ return nullptr;
+ SoFar = getDerived().parseAbiTags(SoFar);
+ if (SoFar == nullptr)
+ return nullptr;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <prefix> <unqualified-name>
+ if (!PushComponent(getDerived().parseUnqualifiedName(State)))
+ return nullptr;
+ Subs.push_back(SoFar);
+ }
+
+ if (SoFar == nullptr || Subs.empty())
+ return nullptr;
+
+ Subs.pop_back();
+ return SoFar;
+}
+
+// <simple-id> ::= <source-name> [ <template-args> ]
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSimpleId() {
+ Node *SN = getDerived().parseSourceName(/*NameState=*/nullptr);
+ if (SN == nullptr)
+ return nullptr;
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ return make<NameWithTemplateArgs>(SN, TA);
+ }
+ return SN;
+}
+
+// <destructor-name> ::= <unresolved-type> # e.g., ~T or ~decltype(f())
+// ::= <simple-id> # e.g., ~A<2*N>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseDestructorName() {
+ Node *Result;
+ if (std::isdigit(look()))
+ Result = getDerived().parseSimpleId();
+ else
+ Result = getDerived().parseUnresolvedType();
+ if (Result == nullptr)
+ return nullptr;
+ return make<DtorName>(Result);
+}
+
+// <unresolved-type> ::= <template-param>
+// ::= <decltype>
+// ::= <substitution>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseUnresolvedType() {
+ if (look() == 'T') {
+ Node *TP = getDerived().parseTemplateParam();
+ if (TP == nullptr)
+ return nullptr;
+ Subs.push_back(TP);
+ return TP;
+ }
+ if (look() == 'D') {
+ Node *DT = getDerived().parseDecltype();
+ if (DT == nullptr)
+ return nullptr;
+ Subs.push_back(DT);
+ return DT;
+ }
+ return getDerived().parseSubstitution();
+}
+
+// <base-unresolved-name> ::= <simple-id> # unresolved name
+// extension ::= <operator-name> # unresolved operator-function-id
+// extension ::= <operator-name> <template-args> # unresolved operator template-id
+// ::= on <operator-name> # unresolved operator-function-id
+// ::= on <operator-name> <template-args> # unresolved operator template-id
+// ::= dn <destructor-name> # destructor or pseudo-destructor;
+// # e.g. ~X or ~X<N-1>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseBaseUnresolvedName() {
+ if (std::isdigit(look()))
+ return getDerived().parseSimpleId();
+
+ if (consumeIf("dn"))
+ return getDerived().parseDestructorName();
+
+ consumeIf("on");
+
+ Node *Oper = getDerived().parseOperatorName(/*NameState=*/nullptr);
+ if (Oper == nullptr)
+ return nullptr;
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ return make<NameWithTemplateArgs>(Oper, TA);
+ }
+ return Oper;
+}
+
+// <unresolved-name>
+// extension ::= srN <unresolved-type> [<template-args>] <unresolved-qualifier-level>* E <base-unresolved-name>
+// ::= [gs] <base-unresolved-name> # x or (with "gs") ::x
+// ::= [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name>
+// # A::x, N::y, A<T>::z; "gs" means leading "::"
+// ::= sr <unresolved-type> <base-unresolved-name> # T::x / decltype(p)::x
+// extension ::= sr <unresolved-type> <template-args> <base-unresolved-name>
+// # T::N::x /decltype(p)::N::x
+// (ignored) ::= srN <unresolved-type> <unresolved-qualifier-level>+ E <base-unresolved-name>
+//
+// <unresolved-qualifier-level> ::= <simple-id>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseUnresolvedName() {
+ Node *SoFar = nullptr;
+
+ // srN <unresolved-type> [<template-args>] <unresolved-qualifier-level>* E <base-unresolved-name>
+ // srN <unresolved-type> <unresolved-qualifier-level>+ E <base-unresolved-name>
+ if (consumeIf("srN")) {
+ SoFar = getDerived().parseUnresolvedType();
+ if (SoFar == nullptr)
+ return nullptr;
+
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ SoFar = make<NameWithTemplateArgs>(SoFar, TA);
+ if (!SoFar)
+ return nullptr;
+ }
+
+ while (!consumeIf('E')) {
+ Node *Qual = getDerived().parseSimpleId();
+ if (Qual == nullptr)
+ return nullptr;
+ SoFar = make<QualifiedName>(SoFar, Qual);
+ if (!SoFar)
+ return nullptr;
+ }
+
+ Node *Base = getDerived().parseBaseUnresolvedName();
+ if (Base == nullptr)
+ return nullptr;
+ return make<QualifiedName>(SoFar, Base);
+ }
+
+ bool Global = consumeIf("gs");
+
+ // [gs] <base-unresolved-name> # x or (with "gs") ::x
+ if (!consumeIf("sr")) {
+ SoFar = getDerived().parseBaseUnresolvedName();
+ if (SoFar == nullptr)
+ return nullptr;
+ if (Global)
+ SoFar = make<GlobalQualifiedName>(SoFar);
+ return SoFar;
+ }
+
+ // [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name>
+ if (std::isdigit(look())) {
+ do {
+ Node *Qual = getDerived().parseSimpleId();
+ if (Qual == nullptr)
+ return nullptr;
+ if (SoFar)
+ SoFar = make<QualifiedName>(SoFar, Qual);
+ else if (Global)
+ SoFar = make<GlobalQualifiedName>(Qual);
+ else
+ SoFar = Qual;
+ if (!SoFar)
+ return nullptr;
+ } while (!consumeIf('E'));
+ }
+ // sr <unresolved-type> <base-unresolved-name>
+ // sr <unresolved-type> <template-args> <base-unresolved-name>
+ else {
+ SoFar = getDerived().parseUnresolvedType();
+ if (SoFar == nullptr)
+ return nullptr;
+
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ SoFar = make<NameWithTemplateArgs>(SoFar, TA);
+ if (!SoFar)
+ return nullptr;
+ }
+ }
+
+ assert(SoFar != nullptr);
+
+ Node *Base = getDerived().parseBaseUnresolvedName();
+ if (Base == nullptr)
+ return nullptr;
+ return make<QualifiedName>(SoFar, Base);
+}
+
+// <abi-tags> ::= <abi-tag> [<abi-tags>]
+// <abi-tag> ::= B <source-name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseAbiTags(Node *N) {
+ while (consumeIf('B')) {
+ StringView SN = parseBareSourceName();
+ if (SN.empty())
+ return nullptr;
+ N = make<AbiTagAttr>(N, SN);
+ if (!N)
+ return nullptr;
+ }
+ return N;
+}
+
+// <number> ::= [n] <non-negative decimal integer>
+template <typename Alloc, typename Derived>
+StringView
+AbstractManglingParser<Alloc, Derived>::parseNumber(bool AllowNegative) {
+ const char *Tmp = First;
+ if (AllowNegative)
+ consumeIf('n');
+ if (numLeft() == 0 || !std::isdigit(*First))
+ return StringView();
+ while (numLeft() != 0 && std::isdigit(*First))
+ ++First;
+ return StringView(Tmp, First);
+}
+
+// <positive length number> ::= [0-9]*
+template <typename Alloc, typename Derived>
+bool AbstractManglingParser<Alloc, Derived>::parsePositiveInteger(size_t *Out) {
+ *Out = 0;
+ if (look() < '0' || look() > '9')
+ return true;
+ while (look() >= '0' && look() <= '9') {
+ *Out *= 10;
+ *Out += static_cast<size_t>(consume() - '0');
+ }
+ return false;
+}
+
+template <typename Alloc, typename Derived>
+StringView AbstractManglingParser<Alloc, Derived>::parseBareSourceName() {
+ size_t Int = 0;
+ if (parsePositiveInteger(&Int) || numLeft() < Int)
+ return StringView();
+ StringView R(First, First + Int);
+ First += Int;
+ return R;
+}
+
+// <function-type> ::= [<CV-qualifiers>] [<exception-spec>] [Dx] F [Y] <bare-function-type> [<ref-qualifier>] E
+//
+// <exception-spec> ::= Do # non-throwing exception-specification (e.g., noexcept, throw())
+// ::= DO <expression> E # computed (instantiation-dependent) noexcept
+// ::= Dw <type>+ E # dynamic exception specification with instantiation-dependent types
+//
+// <ref-qualifier> ::= R # & ref-qualifier
+// <ref-qualifier> ::= O # && ref-qualifier
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseFunctionType() {
+ Qualifiers CVQuals = parseCVQualifiers();
+
+ Node *ExceptionSpec = nullptr;
+ if (consumeIf("Do")) {
+ ExceptionSpec = make<NameType>("noexcept");
+ if (!ExceptionSpec)
+ return nullptr;
+ } else if (consumeIf("DO")) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr || !consumeIf('E'))
+ return nullptr;
+ ExceptionSpec = make<NoexceptSpec>(E);
+ if (!ExceptionSpec)
+ return nullptr;
+ } else if (consumeIf("Dw")) {
+ size_t SpecsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ Names.push_back(T);
+ }
+ ExceptionSpec =
+ make<DynamicExceptionSpec>(popTrailingNodeArray(SpecsBegin));
+ if (!ExceptionSpec)
+ return nullptr;
+ }
+
+ consumeIf("Dx"); // transaction safe
+
+ if (!consumeIf('F'))
+ return nullptr;
+ consumeIf('Y'); // extern "C"
+ Node *ReturnType = getDerived().parseType();
+ if (ReturnType == nullptr)
+ return nullptr;
+
+ FunctionRefQual ReferenceQualifier = FrefQualNone;
+ size_t ParamsBegin = Names.size();
+ while (true) {
+ if (consumeIf('E'))
+ break;
+ if (consumeIf('v'))
+ continue;
+ if (consumeIf("RE")) {
+ ReferenceQualifier = FrefQualLValue;
+ break;
+ }
+ if (consumeIf("OE")) {
+ ReferenceQualifier = FrefQualRValue;
+ break;
+ }
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ Names.push_back(T);
+ }
+
+ NodeArray Params = popTrailingNodeArray(ParamsBegin);
+ return make<FunctionType>(ReturnType, Params, CVQuals,
+ ReferenceQualifier, ExceptionSpec);
+}
+
+// extension:
+// <vector-type> ::= Dv <positive dimension number> _ <extended element type>
+// ::= Dv [<dimension expression>] _ <element type>
+// <extended element type> ::= <element type>
+// ::= p # AltiVec vector pixel
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseVectorType() {
+ if (!consumeIf("Dv"))
+ return nullptr;
+ if (look() >= '1' && look() <= '9') {
+ StringView DimensionNumber = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ if (consumeIf('p'))
+ return make<PixelVectorType>(DimensionNumber);
+ Node *ElemType = getDerived().parseType();
+ if (ElemType == nullptr)
+ return nullptr;
+ return make<VectorType>(ElemType, DimensionNumber);
+ }
+
+ if (!consumeIf('_')) {
+ Node *DimExpr = getDerived().parseExpr();
+ if (!DimExpr)
+ return nullptr;
+ if (!consumeIf('_'))
+ return nullptr;
+ Node *ElemType = getDerived().parseType();
+ if (!ElemType)
+ return nullptr;
+ return make<VectorType>(ElemType, DimExpr);
+ }
+ Node *ElemType = getDerived().parseType();
+ if (!ElemType)
+ return nullptr;
+ return make<VectorType>(ElemType, StringView());
+}
+
+// <decltype> ::= Dt <expression> E # decltype of an id-expression or class member access (C++0x)
+// ::= DT <expression> E # decltype of an expression (C++0x)
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseDecltype() {
+ if (!consumeIf('D'))
+ return nullptr;
+ if (!consumeIf('t') && !consumeIf('T'))
+ return nullptr;
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return nullptr;
+ if (!consumeIf('E'))
+ return nullptr;
+ return make<EnclosingExpr>("decltype(", E, ")");
+}
+
+// <array-type> ::= A <positive dimension number> _ <element type>
+// ::= A [<dimension expression>] _ <element type>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseArrayType() {
+ if (!consumeIf('A'))
+ return nullptr;
+
+ NodeOrString Dimension;
+
+ if (std::isdigit(look())) {
+ Dimension = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ } else if (!consumeIf('_')) {
+ Node *DimExpr = getDerived().parseExpr();
+ if (DimExpr == nullptr)
+ return nullptr;
+ if (!consumeIf('_'))
+ return nullptr;
+ Dimension = DimExpr;
+ }
+
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<ArrayType>(Ty, Dimension);
+}
+
+// <pointer-to-member-type> ::= M <class type> <member type>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parsePointerToMemberType() {
+ if (!consumeIf('M'))
+ return nullptr;
+ Node *ClassType = getDerived().parseType();
+ if (ClassType == nullptr)
+ return nullptr;
+ Node *MemberType = getDerived().parseType();
+ if (MemberType == nullptr)
+ return nullptr;
+ return make<PointerToMemberType>(ClassType, MemberType);
+}
+
+// <class-enum-type> ::= <name> # non-dependent type name, dependent type name, or dependent typename-specifier
+// ::= Ts <name> # dependent elaborated type specifier using 'struct' or 'class'
+// ::= Tu <name> # dependent elaborated type specifier using 'union'
+// ::= Te <name> # dependent elaborated type specifier using 'enum'
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseClassEnumType() {
+ StringView ElabSpef;
+ if (consumeIf("Ts"))
+ ElabSpef = "struct";
+ else if (consumeIf("Tu"))
+ ElabSpef = "union";
+ else if (consumeIf("Te"))
+ ElabSpef = "enum";
+
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+
+ if (!ElabSpef.empty())
+ return make<ElaboratedTypeSpefType>(ElabSpef, Name);
+
+ return Name;
+}
+
+// <qualified-type> ::= <qualifiers> <type>
+// <qualifiers> ::= <extended-qualifier>* <CV-qualifiers>
+// <extended-qualifier> ::= U <source-name> [<template-args>] # vendor extended type qualifier
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseQualifiedType() {
+ if (consumeIf('U')) {
+ StringView Qual = parseBareSourceName();
+ if (Qual.empty())
+ return nullptr;
+
+ // FIXME parse the optional <template-args> here!
+
+ // extension ::= U <objc-name> <objc-type> # objc-type<identifier>
+ if (Qual.startsWith("objcproto")) {
+ StringView ProtoSourceName = Qual.dropFront(std::strlen("objcproto"));
+ StringView Proto;
+ {
+ SwapAndRestore<const char *> SaveFirst(First, ProtoSourceName.begin()),
+ SaveLast(Last, ProtoSourceName.end());
+ Proto = parseBareSourceName();
+ }
+ if (Proto.empty())
+ return nullptr;
+ Node *Child = getDerived().parseQualifiedType();
+ if (Child == nullptr)
+ return nullptr;
+ return make<ObjCProtoName>(Child, Proto);
+ }
+
+ Node *Child = getDerived().parseQualifiedType();
+ if (Child == nullptr)
+ return nullptr;
+ return make<VendorExtQualType>(Child, Qual);
+ }
+
+ Qualifiers Quals = parseCVQualifiers();
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ if (Quals != QualNone)
+ Ty = make<QualType>(Ty, Quals);
+ return Ty;
+}
+
+// <type> ::= <builtin-type>
+// ::= <qualified-type>
+// ::= <function-type>
+// ::= <class-enum-type>
+// ::= <array-type>
+// ::= <pointer-to-member-type>
+// ::= <template-param>
+// ::= <template-template-param> <template-args>
+// ::= <decltype>
+// ::= P <type> # pointer
+// ::= R <type> # l-value reference
+// ::= O <type> # r-value reference (C++11)
+// ::= C <type> # complex pair (C99)
+// ::= G <type> # imaginary (C99)
+// ::= <substitution> # See Compression below
+// extension ::= U <objc-name> <objc-type> # objc-type<identifier>
+// extension ::= <vector-type> # <vector-type> starts with Dv
+//
+// <objc-name> ::= <k0 number> objcproto <k1 number> <identifier> # k0 = 9 + <number of digits in k1> + k1
+// <objc-type> ::= <source-name> # PU<11+>objcproto 11objc_object<source-name> 11objc_object -> id<source-name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseType() {
+ Node *Result = nullptr;
+
+ switch (look()) {
+ // ::= <qualified-type>
+ case 'r':
+ case 'V':
+ case 'K': {
+ unsigned AfterQuals = 0;
+ if (look(AfterQuals) == 'r') ++AfterQuals;
+ if (look(AfterQuals) == 'V') ++AfterQuals;
+ if (look(AfterQuals) == 'K') ++AfterQuals;
+
+ if (look(AfterQuals) == 'F' ||
+ (look(AfterQuals) == 'D' &&
+ (look(AfterQuals + 1) == 'o' || look(AfterQuals + 1) == 'O' ||
+ look(AfterQuals + 1) == 'w' || look(AfterQuals + 1) == 'x'))) {
+ Result = getDerived().parseFunctionType();
+ break;
+ }
+ DEMANGLE_FALLTHROUGH;
+ }
+ case 'U': {
+ Result = getDerived().parseQualifiedType();
+ break;
+ }
+ // <builtin-type> ::= v # void
+ case 'v':
+ ++First;
+ return make<NameType>("void");
+ // ::= w # wchar_t
+ case 'w':
+ ++First;
+ return make<NameType>("wchar_t");
+ // ::= b # bool
+ case 'b':
+ ++First;
+ return make<NameType>("bool");
+ // ::= c # char
+ case 'c':
+ ++First;
+ return make<NameType>("char");
+ // ::= a # signed char
+ case 'a':
+ ++First;
+ return make<NameType>("signed char");
+ // ::= h # unsigned char
+ case 'h':
+ ++First;
+ return make<NameType>("unsigned char");
+ // ::= s # short
+ case 's':
+ ++First;
+ return make<NameType>("short");
+ // ::= t # unsigned short
+ case 't':
+ ++First;
+ return make<NameType>("unsigned short");
+ // ::= i # int
+ case 'i':
+ ++First;
+ return make<NameType>("int");
+ // ::= j # unsigned int
+ case 'j':
+ ++First;
+ return make<NameType>("unsigned int");
+ // ::= l # long
+ case 'l':
+ ++First;
+ return make<NameType>("long");
+ // ::= m # unsigned long
+ case 'm':
+ ++First;
+ return make<NameType>("unsigned long");
+ // ::= x # long long, __int64
+ case 'x':
+ ++First;
+ return make<NameType>("long long");
+ // ::= y # unsigned long long, __int64
+ case 'y':
+ ++First;
+ return make<NameType>("unsigned long long");
+ // ::= n # __int128
+ case 'n':
+ ++First;
+ return make<NameType>("__int128");
+ // ::= o # unsigned __int128
+ case 'o':
+ ++First;
+ return make<NameType>("unsigned __int128");
+ // ::= f # float
+ case 'f':
+ ++First;
+ return make<NameType>("float");
+ // ::= d # double
+ case 'd':
+ ++First;
+ return make<NameType>("double");
+ // ::= e # long double, __float80
+ case 'e':
+ ++First;
+ return make<NameType>("long double");
+ // ::= g # __float128
+ case 'g':
+ ++First;
+ return make<NameType>("__float128");
+ // ::= z # ellipsis
+ case 'z':
+ ++First;
+ return make<NameType>("...");
+
+ // <builtin-type> ::= u <source-name> # vendor extended type
+ case 'u': {
+ ++First;
+ StringView Res = parseBareSourceName();
+ if (Res.empty())
+ return nullptr;
+ // Typically, <builtin-type>s are not considered substitution candidates,
+ // but the exception to that exception is vendor extended types (Itanium C++
+ // ABI 5.9.1).
+ Result = make<NameType>(Res);
+ break;
+ }
+ case 'D':
+ switch (look(1)) {
+ // ::= Dd # IEEE 754r decimal floating point (64 bits)
+ case 'd':
+ First += 2;
+ return make<NameType>("decimal64");
+ // ::= De # IEEE 754r decimal floating point (128 bits)
+ case 'e':
+ First += 2;
+ return make<NameType>("decimal128");
+ // ::= Df # IEEE 754r decimal floating point (32 bits)
+ case 'f':
+ First += 2;
+ return make<NameType>("decimal32");
+ // ::= Dh # IEEE 754r half-precision floating point (16 bits)
+ case 'h':
+ First += 2;
+ return make<NameType>("decimal16");
+ // ::= Di # char32_t
+ case 'i':
+ First += 2;
+ return make<NameType>("char32_t");
+ // ::= Ds # char16_t
+ case 's':
+ First += 2;
+ return make<NameType>("char16_t");
+ // ::= Du # char8_t (C++2a, not yet in the Itanium spec)
+ case 'u':
+ First += 2;
+ return make<NameType>("char8_t");
+ // ::= Da # auto (in dependent new-expressions)
+ case 'a':
+ First += 2;
+ return make<NameType>("auto");
+ // ::= Dc # decltype(auto)
+ case 'c':
+ First += 2;
+ return make<NameType>("decltype(auto)");
+ // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
+ case 'n':
+ First += 2;
+ return make<NameType>("std::nullptr_t");
+
+ // ::= <decltype>
+ case 't':
+ case 'T': {
+ Result = getDerived().parseDecltype();
+ break;
+ }
+ // extension ::= <vector-type> # <vector-type> starts with Dv
+ case 'v': {
+ Result = getDerived().parseVectorType();
+ break;
+ }
+ // ::= Dp <type> # pack expansion (C++0x)
+ case 'p': {
+ First += 2;
+ Node *Child = getDerived().parseType();
+ if (!Child)
+ return nullptr;
+ Result = make<ParameterPackExpansion>(Child);
+ break;
+ }
+ // Exception specifier on a function type.
+ case 'o':
+ case 'O':
+ case 'w':
+ // Transaction safe function type.
+ case 'x':
+ Result = getDerived().parseFunctionType();
+ break;
+ }
+ break;
+ // ::= <function-type>
+ case 'F': {
+ Result = getDerived().parseFunctionType();
+ break;
+ }
+ // ::= <array-type>
+ case 'A': {
+ Result = getDerived().parseArrayType();
+ break;
+ }
+ // ::= <pointer-to-member-type>
+ case 'M': {
+ Result = getDerived().parsePointerToMemberType();
+ break;
+ }
+ // ::= <template-param>
+ case 'T': {
+ // This could be an elaborate type specifier on a <class-enum-type>.
+ if (look(1) == 's' || look(1) == 'u' || look(1) == 'e') {
+ Result = getDerived().parseClassEnumType();
+ break;
+ }
+
+ Result = getDerived().parseTemplateParam();
+ if (Result == nullptr)
+ return nullptr;
+
+ // Result could be either of:
+ // <type> ::= <template-param>
+ // <type> ::= <template-template-param> <template-args>
+ //
+ // <template-template-param> ::= <template-param>
+ // ::= <substitution>
+ //
+ // If this is followed by some <template-args>, and we're permitted to
+ // parse them, take the second production.
+
+ if (TryToParseTemplateArgs && look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ Result = make<NameWithTemplateArgs>(Result, TA);
+ }
+ break;
+ }
+ // ::= P <type> # pointer
+ case 'P': {
+ ++First;
+ Node *Ptr = getDerived().parseType();
+ if (Ptr == nullptr)
+ return nullptr;
+ Result = make<PointerType>(Ptr);
+ break;
+ }
+ // ::= R <type> # l-value reference
+ case 'R': {
+ ++First;
+ Node *Ref = getDerived().parseType();
+ if (Ref == nullptr)
+ return nullptr;
+ Result = make<ReferenceType>(Ref, ReferenceKind::LValue);
+ break;
+ }
+ // ::= O <type> # r-value reference (C++11)
+ case 'O': {
+ ++First;
+ Node *Ref = getDerived().parseType();
+ if (Ref == nullptr)
+ return nullptr;
+ Result = make<ReferenceType>(Ref, ReferenceKind::RValue);
+ break;
+ }
+ // ::= C <type> # complex pair (C99)
+ case 'C': {
+ ++First;
+ Node *P = getDerived().parseType();
+ if (P == nullptr)
+ return nullptr;
+ Result = make<PostfixQualifiedType>(P, " complex");
+ break;
+ }
+ // ::= G <type> # imaginary (C99)
+ case 'G': {
+ ++First;
+ Node *P = getDerived().parseType();
+ if (P == nullptr)
+ return P;
+ Result = make<PostfixQualifiedType>(P, " imaginary");
+ break;
+ }
+ // ::= <substitution> # See Compression below
+ case 'S': {
+ if (look(1) && look(1) != 't') {
+ Node *Sub = getDerived().parseSubstitution();
+ if (Sub == nullptr)
+ return nullptr;
+
+ // Sub could be either of:
+ // <type> ::= <substitution>
+ // <type> ::= <template-template-param> <template-args>
+ //
+ // <template-template-param> ::= <template-param>
+ // ::= <substitution>
+ //
+ // If this is followed by some <template-args>, and we're permitted to
+ // parse them, take the second production.
+
+ if (TryToParseTemplateArgs && look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ Result = make<NameWithTemplateArgs>(Sub, TA);
+ break;
+ }
+
+ // If all we parsed was a substitution, don't re-insert into the
+ // substitution table.
+ return Sub;
+ }
+ DEMANGLE_FALLTHROUGH;
+ }
+ // ::= <class-enum-type>
+ default: {
+ Result = getDerived().parseClassEnumType();
+ break;
+ }
+ }
+
+ // If we parsed a type, insert it into the substitution table. Note that all
+ // <builtin-type>s and <substitution>s have already bailed out, because they
+ // don't get substitutions.
+ if (Result != nullptr)
+ Subs.push_back(Result);
+ return Result;
+}
+
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parsePrefixExpr(StringView Kind) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return nullptr;
+ return make<PrefixExpr>(Kind, E);
+}
+
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseBinaryExpr(StringView Kind) {
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return nullptr;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<BinaryExpr>(LHS, Kind, RHS);
+}
+
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseIntegerLiteral(StringView Lit) {
+ StringView Tmp = parseNumber(true);
+ if (!Tmp.empty() && consumeIf('E'))
+ return make<IntegerLiteral>(Lit, Tmp);
+ return nullptr;
+}
+
+// <CV-Qualifiers> ::= [r] [V] [K]
+template <typename Alloc, typename Derived>
+Qualifiers AbstractManglingParser<Alloc, Derived>::parseCVQualifiers() {
+ Qualifiers CVR = QualNone;
+ if (consumeIf('r'))
+ CVR |= QualRestrict;
+ if (consumeIf('V'))
+ CVR |= QualVolatile;
+ if (consumeIf('K'))
+ CVR |= QualConst;
+ return CVR;
+}
+
+// <function-param> ::= fp <top-level CV-Qualifiers> _ # L == 0, first parameter
+// ::= fp <top-level CV-Qualifiers> <parameter-2 non-negative number> _ # L == 0, second and later parameters
+// ::= fL <L-1 non-negative number> p <top-level CV-Qualifiers> _ # L > 0, first parameter
+// ::= fL <L-1 non-negative number> p <top-level CV-Qualifiers> <parameter-2 non-negative number> _ # L > 0, second and later parameters
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseFunctionParam() {
+ if (consumeIf("fp")) {
+ parseCVQualifiers();
+ StringView Num = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<FunctionParam>(Num);
+ }
+ if (consumeIf("fL")) {
+ if (parseNumber().empty())
+ return nullptr;
+ if (!consumeIf('p'))
+ return nullptr;
+ parseCVQualifiers();
+ StringView Num = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<FunctionParam>(Num);
+ }
+ return nullptr;
+}
+
+// [gs] nw <expression>* _ <type> E # new (expr-list) type
+// [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type (init)
+// [gs] na <expression>* _ <type> E # new[] (expr-list) type
+// [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type (init)
+// <initializer> ::= pi <expression>* E # parenthesized initialization
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseNewExpr() {
+ bool Global = consumeIf("gs");
+ bool IsArray = look(1) == 'a';
+ if (!consumeIf("nw") && !consumeIf("na"))
+ return nullptr;
+ size_t Exprs = Names.size();
+ while (!consumeIf('_')) {
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return nullptr;
+ Names.push_back(Ex);
+ }
+ NodeArray ExprList = popTrailingNodeArray(Exprs);
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ if (consumeIf("pi")) {
+ size_t InitsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *Init = getDerived().parseExpr();
+ if (Init == nullptr)
+ return Init;
+ Names.push_back(Init);
+ }
+ NodeArray Inits = popTrailingNodeArray(InitsBegin);
+ return make<NewExpr>(ExprList, Ty, Inits, Global, IsArray);
+ } else if (!consumeIf('E'))
+ return nullptr;
+ return make<NewExpr>(ExprList, Ty, NodeArray(), Global, IsArray);
+}
+
+// cv <type> <expression> # conversion with one argument
+// cv <type> _ <expression>* E # conversion with a different number of arguments
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseConversionExpr() {
+ if (!consumeIf("cv"))
+ return nullptr;
+ Node *Ty;
+ {
+ SwapAndRestore<bool> SaveTemp(TryToParseTemplateArgs, false);
+ Ty = getDerived().parseType();
+ }
+
+ if (Ty == nullptr)
+ return nullptr;
+
+ if (consumeIf('_')) {
+ size_t ExprsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return E;
+ Names.push_back(E);
+ }
+ NodeArray Exprs = popTrailingNodeArray(ExprsBegin);
+ return make<ConversionExpr>(Ty, Exprs);
+ }
+
+ Node *E[1] = {getDerived().parseExpr()};
+ if (E[0] == nullptr)
+ return nullptr;
+ return make<ConversionExpr>(Ty, makeNodeArray(E, E + 1));
+}
+
+// <expr-primary> ::= L <type> <value number> E # integer literal
+// ::= L <type> <value float> E # floating literal
+// ::= L <string type> E # string literal
+// ::= L <nullptr type> E # nullptr literal (i.e., "LDnE")
+// ::= L <lambda type> E # lambda expression
+// FIXME: ::= L <type> <real-part float> _ <imag-part float> E # complex floating point literal (C 2000)
+// ::= L <mangled-name> E # external name
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseExprPrimary() {
+ if (!consumeIf('L'))
+ return nullptr;
+ switch (look()) {
+ case 'w':
+ ++First;
+ return getDerived().parseIntegerLiteral("wchar_t");
+ case 'b':
+ if (consumeIf("b0E"))
+ return make<BoolExpr>(0);
+ if (consumeIf("b1E"))
+ return make<BoolExpr>(1);
+ return nullptr;
+ case 'c':
+ ++First;
+ return getDerived().parseIntegerLiteral("char");
+ case 'a':
+ ++First;
+ return getDerived().parseIntegerLiteral("signed char");
+ case 'h':
+ ++First;
+ return getDerived().parseIntegerLiteral("unsigned char");
+ case 's':
+ ++First;
+ return getDerived().parseIntegerLiteral("short");
+ case 't':
+ ++First;
+ return getDerived().parseIntegerLiteral("unsigned short");
+ case 'i':
+ ++First;
+ return getDerived().parseIntegerLiteral("");
+ case 'j':
+ ++First;
+ return getDerived().parseIntegerLiteral("u");
+ case 'l':
+ ++First;
+ return getDerived().parseIntegerLiteral("l");
+ case 'm':
+ ++First;
+ return getDerived().parseIntegerLiteral("ul");
+ case 'x':
+ ++First;
+ return getDerived().parseIntegerLiteral("ll");
+ case 'y':
+ ++First;
+ return getDerived().parseIntegerLiteral("ull");
+ case 'n':
+ ++First;
+ return getDerived().parseIntegerLiteral("__int128");
+ case 'o':
+ ++First;
+ return getDerived().parseIntegerLiteral("unsigned __int128");
+ case 'f':
+ ++First;
+ return getDerived().template parseFloatingLiteral<float>();
+ case 'd':
+ ++First;
+ return getDerived().template parseFloatingLiteral<double>();
+ case 'e':
+ ++First;
+ return getDerived().template parseFloatingLiteral<long double>();
+ case '_':
+ if (consumeIf("_Z")) {
+ Node *R = getDerived().parseEncoding();
+ if (R != nullptr && consumeIf('E'))
+ return R;
+ }
+ return nullptr;
+ case 'A': {
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ // FIXME: We need to include the string contents in the mangling.
+ if (consumeIf('E'))
+ return make<StringLiteral>(T);
+ return nullptr;
+ }
+ case 'D':
+ if (consumeIf("DnE"))
+ return make<NameType>("nullptr");
+ return nullptr;
+ case 'T':
+ // Invalid mangled name per
+ // http://sourcerytools.com/pipermail/cxx-abi-dev/2011-August/002422.html
+ return nullptr;
+ case 'U': {
+ // FIXME: Should we support LUb... for block literals?
+ if (look(1) != 'l')
+ return nullptr;
+ Node *T = parseUnnamedTypeName(nullptr);
+ if (!T || !consumeIf('E'))
+ return nullptr;
+ return make<LambdaExpr>(T);
+ }
+ default: {
+ // might be named type
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ StringView N = parseNumber();
+ if (N.empty())
+ return nullptr;
+ if (!consumeIf('E'))
+ return nullptr;
+ return make<IntegerCastExpr>(T, N);
+ }
+ }
+}
+
+// <braced-expression> ::= <expression>
+// ::= di <field source-name> <braced-expression> # .name = expr
+// ::= dx <index expression> <braced-expression> # [expr] = expr
+// ::= dX <range begin expression> <range end expression> <braced-expression>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseBracedExpr() {
+ if (look() == 'd') {
+ switch (look(1)) {
+ case 'i': {
+ First += 2;
+ Node *Field = getDerived().parseSourceName(/*NameState=*/nullptr);
+ if (Field == nullptr)
+ return nullptr;
+ Node *Init = getDerived().parseBracedExpr();
+ if (Init == nullptr)
+ return nullptr;
+ return make<BracedExpr>(Field, Init, /*isArray=*/false);
+ }
+ case 'x': {
+ First += 2;
+ Node *Index = getDerived().parseExpr();
+ if (Index == nullptr)
+ return nullptr;
+ Node *Init = getDerived().parseBracedExpr();
+ if (Init == nullptr)
+ return nullptr;
+ return make<BracedExpr>(Index, Init, /*isArray=*/true);
+ }
+ case 'X': {
+ First += 2;
+ Node *RangeBegin = getDerived().parseExpr();
+ if (RangeBegin == nullptr)
+ return nullptr;
+ Node *RangeEnd = getDerived().parseExpr();
+ if (RangeEnd == nullptr)
+ return nullptr;
+ Node *Init = getDerived().parseBracedExpr();
+ if (Init == nullptr)
+ return nullptr;
+ return make<BracedRangeExpr>(RangeBegin, RangeEnd, Init);
+ }
+ }
+ }
+ return getDerived().parseExpr();
+}
+
+// (not yet in the spec)
+// <fold-expr> ::= fL <binary-operator-name> <expression> <expression>
+// ::= fR <binary-operator-name> <expression> <expression>
+// ::= fl <binary-operator-name> <expression>
+// ::= fr <binary-operator-name> <expression>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseFoldExpr() {
+ if (!consumeIf('f'))
+ return nullptr;
+
+ char FoldKind = look();
+ bool IsLeftFold, HasInitializer;
+ HasInitializer = FoldKind == 'L' || FoldKind == 'R';
+ if (FoldKind == 'l' || FoldKind == 'L')
+ IsLeftFold = true;
+ else if (FoldKind == 'r' || FoldKind == 'R')
+ IsLeftFold = false;
+ else
+ return nullptr;
+ ++First;
+
+ // FIXME: This map is duplicated in parseOperatorName and parseExpr.
+ StringView OperatorName;
+ if (consumeIf("aa")) OperatorName = "&&";
+ else if (consumeIf("an")) OperatorName = "&";
+ else if (consumeIf("aN")) OperatorName = "&=";
+ else if (consumeIf("aS")) OperatorName = "=";
+ else if (consumeIf("cm")) OperatorName = ",";
+ else if (consumeIf("ds")) OperatorName = ".*";
+ else if (consumeIf("dv")) OperatorName = "/";
+ else if (consumeIf("dV")) OperatorName = "/=";
+ else if (consumeIf("eo")) OperatorName = "^";
+ else if (consumeIf("eO")) OperatorName = "^=";
+ else if (consumeIf("eq")) OperatorName = "==";
+ else if (consumeIf("ge")) OperatorName = ">=";
+ else if (consumeIf("gt")) OperatorName = ">";
+ else if (consumeIf("le")) OperatorName = "<=";
+ else if (consumeIf("ls")) OperatorName = "<<";
+ else if (consumeIf("lS")) OperatorName = "<<=";
+ else if (consumeIf("lt")) OperatorName = "<";
+ else if (consumeIf("mi")) OperatorName = "-";
+ else if (consumeIf("mI")) OperatorName = "-=";
+ else if (consumeIf("ml")) OperatorName = "*";
+ else if (consumeIf("mL")) OperatorName = "*=";
+ else if (consumeIf("ne")) OperatorName = "!=";
+ else if (consumeIf("oo")) OperatorName = "||";
+ else if (consumeIf("or")) OperatorName = "|";
+ else if (consumeIf("oR")) OperatorName = "|=";
+ else if (consumeIf("pl")) OperatorName = "+";
+ else if (consumeIf("pL")) OperatorName = "+=";
+ else if (consumeIf("rm")) OperatorName = "%";
+ else if (consumeIf("rM")) OperatorName = "%=";
+ else if (consumeIf("rs")) OperatorName = ">>";
+ else if (consumeIf("rS")) OperatorName = ">>=";
+ else return nullptr;
+
+ Node *Pack = getDerived().parseExpr(), *Init = nullptr;
+ if (Pack == nullptr)
+ return nullptr;
+ if (HasInitializer) {
+ Init = getDerived().parseExpr();
+ if (Init == nullptr)
+ return nullptr;
+ }
+
+ if (IsLeftFold && Init)
+ std::swap(Pack, Init);
+
+ return make<FoldExpr>(IsLeftFold, OperatorName, Pack, Init);
+}
+
+// <expression> ::= <unary operator-name> <expression>
+// ::= <binary operator-name> <expression> <expression>
+// ::= <ternary operator-name> <expression> <expression> <expression>
+// ::= cl <expression>+ E # call
+// ::= cv <type> <expression> # conversion with one argument
+// ::= cv <type> _ <expression>* E # conversion with a different number of arguments
+// ::= [gs] nw <expression>* _ <type> E # new (expr-list) type
+// ::= [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type (init)
+// ::= [gs] na <expression>* _ <type> E # new[] (expr-list) type
+// ::= [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type (init)
+// ::= [gs] dl <expression> # delete expression
+// ::= [gs] da <expression> # delete[] expression
+// ::= pp_ <expression> # prefix ++
+// ::= mm_ <expression> # prefix --
+// ::= ti <type> # typeid (type)
+// ::= te <expression> # typeid (expression)
+// ::= dc <type> <expression> # dynamic_cast<type> (expression)
+// ::= sc <type> <expression> # static_cast<type> (expression)
+// ::= cc <type> <expression> # const_cast<type> (expression)
+// ::= rc <type> <expression> # reinterpret_cast<type> (expression)
+// ::= st <type> # sizeof (a type)
+// ::= sz <expression> # sizeof (an expression)
+// ::= at <type> # alignof (a type)
+// ::= az <expression> # alignof (an expression)
+// ::= nx <expression> # noexcept (expression)
+// ::= <template-param>
+// ::= <function-param>
+// ::= dt <expression> <unresolved-name> # expr.name
+// ::= pt <expression> <unresolved-name> # expr->name
+// ::= ds <expression> <expression> # expr.*expr
+// ::= sZ <template-param> # size of a parameter pack
+// ::= sZ <function-param> # size of a function parameter pack
+// ::= sP <template-arg>* E # sizeof...(T), size of a captured template parameter pack from an alias template
+// ::= sp <expression> # pack expansion
+// ::= tw <expression> # throw expression
+// ::= tr # throw with no operand (rethrow)
+// ::= <unresolved-name> # f(p), N::f(p), ::f(p),
+// # freestanding dependent name (e.g., T::x),
+// # objectless nonstatic member reference
+// ::= fL <binary-operator-name> <expression> <expression>
+// ::= fR <binary-operator-name> <expression> <expression>
+// ::= fl <binary-operator-name> <expression>
+// ::= fr <binary-operator-name> <expression>
+// ::= <expr-primary>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseExpr() {
+ bool Global = consumeIf("gs");
+ if (numLeft() < 2)
+ return nullptr;
+
+ switch (*First) {
+ case 'L':
+ return getDerived().parseExprPrimary();
+ case 'T':
+ return getDerived().parseTemplateParam();
+ case 'f': {
+ // Disambiguate a fold expression from a <function-param>.
+ if (look(1) == 'p' || (look(1) == 'L' && std::isdigit(look(2))))
+ return getDerived().parseFunctionParam();
+ return getDerived().parseFoldExpr();
+ }
+ case 'a':
+ switch (First[1]) {
+ case 'a':
+ First += 2;
+ return getDerived().parseBinaryExpr("&&");
+ case 'd':
+ First += 2;
+ return getDerived().parsePrefixExpr("&");
+ case 'n':
+ First += 2;
+ return getDerived().parseBinaryExpr("&");
+ case 'N':
+ First += 2;
+ return getDerived().parseBinaryExpr("&=");
+ case 'S':
+ First += 2;
+ return getDerived().parseBinaryExpr("=");
+ case 't': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<EnclosingExpr>("alignof (", Ty, ")");
+ }
+ case 'z': {
+ First += 2;
+ Node *Ty = getDerived().parseExpr();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<EnclosingExpr>("alignof (", Ty, ")");
+ }
+ }
+ return nullptr;
+ case 'c':
+ switch (First[1]) {
+ // cc <type> <expression> # const_cast<type>(expression)
+ case 'c': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("const_cast", Ty, Ex);
+ }
+ // cl <expression>+ E # call
+ case 'l': {
+ First += 2;
+ Node *Callee = getDerived().parseExpr();
+ if (Callee == nullptr)
+ return Callee;
+ size_t ExprsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return E;
+ Names.push_back(E);
+ }
+ return make<CallExpr>(Callee, popTrailingNodeArray(ExprsBegin));
+ }
+ case 'm':
+ First += 2;
+ return getDerived().parseBinaryExpr(",");
+ case 'o':
+ First += 2;
+ return getDerived().parsePrefixExpr("~");
+ case 'v':
+ return getDerived().parseConversionExpr();
+ }
+ return nullptr;
+ case 'd':
+ switch (First[1]) {
+ case 'a': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<DeleteExpr>(Ex, Global, /*is_array=*/true);
+ }
+ case 'c': {
+ First += 2;
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return T;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("dynamic_cast", T, Ex);
+ }
+ case 'e':
+ First += 2;
+ return getDerived().parsePrefixExpr("*");
+ case 'l': {
+ First += 2;
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return E;
+ return make<DeleteExpr>(E, Global, /*is_array=*/false);
+ }
+ case 'n':
+ return getDerived().parseUnresolvedName();
+ case 's': {
+ First += 2;
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return nullptr;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<MemberExpr>(LHS, ".*", RHS);
+ }
+ case 't': {
+ First += 2;
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return LHS;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<MemberExpr>(LHS, ".", RHS);
+ }
+ case 'v':
+ First += 2;
+ return getDerived().parseBinaryExpr("/");
+ case 'V':
+ First += 2;
+ return getDerived().parseBinaryExpr("/=");
+ }
+ return nullptr;
+ case 'e':
+ switch (First[1]) {
+ case 'o':
+ First += 2;
+ return getDerived().parseBinaryExpr("^");
+ case 'O':
+ First += 2;
+ return getDerived().parseBinaryExpr("^=");
+ case 'q':
+ First += 2;
+ return getDerived().parseBinaryExpr("==");
+ }
+ return nullptr;
+ case 'g':
+ switch (First[1]) {
+ case 'e':
+ First += 2;
+ return getDerived().parseBinaryExpr(">=");
+ case 't':
+ First += 2;
+ return getDerived().parseBinaryExpr(">");
+ }
+ return nullptr;
+ case 'i':
+ switch (First[1]) {
+ case 'x': {
+ First += 2;
+ Node *Base = getDerived().parseExpr();
+ if (Base == nullptr)
+ return nullptr;
+ Node *Index = getDerived().parseExpr();
+ if (Index == nullptr)
+ return Index;
+ return make<ArraySubscriptExpr>(Base, Index);
+ }
+ case 'l': {
+ First += 2;
+ size_t InitsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseBracedExpr();
+ if (E == nullptr)
+ return nullptr;
+ Names.push_back(E);
+ }
+ return make<InitListExpr>(nullptr, popTrailingNodeArray(InitsBegin));
+ }
+ }
+ return nullptr;
+ case 'l':
+ switch (First[1]) {
+ case 'e':
+ First += 2;
+ return getDerived().parseBinaryExpr("<=");
+ case 's':
+ First += 2;
+ return getDerived().parseBinaryExpr("<<");
+ case 'S':
+ First += 2;
+ return getDerived().parseBinaryExpr("<<=");
+ case 't':
+ First += 2;
+ return getDerived().parseBinaryExpr("<");
+ }
+ return nullptr;
+ case 'm':
+ switch (First[1]) {
+ case 'i':
+ First += 2;
+ return getDerived().parseBinaryExpr("-");
+ case 'I':
+ First += 2;
+ return getDerived().parseBinaryExpr("-=");
+ case 'l':
+ First += 2;
+ return getDerived().parseBinaryExpr("*");
+ case 'L':
+ First += 2;
+ return getDerived().parseBinaryExpr("*=");
+ case 'm':
+ First += 2;
+ if (consumeIf('_'))
+ return getDerived().parsePrefixExpr("--");
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return nullptr;
+ return make<PostfixExpr>(Ex, "--");
+ }
+ return nullptr;
+ case 'n':
+ switch (First[1]) {
+ case 'a':
+ case 'w':
+ return getDerived().parseNewExpr();
+ case 'e':
+ First += 2;
+ return getDerived().parseBinaryExpr("!=");
+ case 'g':
+ First += 2;
+ return getDerived().parsePrefixExpr("-");
+ case 't':
+ First += 2;
+ return getDerived().parsePrefixExpr("!");
+ case 'x':
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<EnclosingExpr>("noexcept (", Ex, ")");
+ }
+ return nullptr;
+ case 'o':
+ switch (First[1]) {
+ case 'n':
+ return getDerived().parseUnresolvedName();
+ case 'o':
+ First += 2;
+ return getDerived().parseBinaryExpr("||");
+ case 'r':
+ First += 2;
+ return getDerived().parseBinaryExpr("|");
+ case 'R':
+ First += 2;
+ return getDerived().parseBinaryExpr("|=");
+ }
+ return nullptr;
+ case 'p':
+ switch (First[1]) {
+ case 'm':
+ First += 2;
+ return getDerived().parseBinaryExpr("->*");
+ case 'l':
+ First += 2;
+ return getDerived().parseBinaryExpr("+");
+ case 'L':
+ First += 2;
+ return getDerived().parseBinaryExpr("+=");
+ case 'p': {
+ First += 2;
+ if (consumeIf('_'))
+ return getDerived().parsePrefixExpr("++");
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<PostfixExpr>(Ex, "++");
+ }
+ case 's':
+ First += 2;
+ return getDerived().parsePrefixExpr("+");
+ case 't': {
+ First += 2;
+ Node *L = getDerived().parseExpr();
+ if (L == nullptr)
+ return nullptr;
+ Node *R = getDerived().parseExpr();
+ if (R == nullptr)
+ return nullptr;
+ return make<MemberExpr>(L, "->", R);
+ }
+ }
+ return nullptr;
+ case 'q':
+ if (First[1] == 'u') {
+ First += 2;
+ Node *Cond = getDerived().parseExpr();
+ if (Cond == nullptr)
+ return nullptr;
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return nullptr;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<ConditionalExpr>(Cond, LHS, RHS);
+ }
+ return nullptr;
+ case 'r':
+ switch (First[1]) {
+ case 'c': {
+ First += 2;
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return T;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("reinterpret_cast", T, Ex);
+ }
+ case 'm':
+ First += 2;
+ return getDerived().parseBinaryExpr("%");
+ case 'M':
+ First += 2;
+ return getDerived().parseBinaryExpr("%=");
+ case 's':
+ First += 2;
+ return getDerived().parseBinaryExpr(">>");
+ case 'S':
+ First += 2;
+ return getDerived().parseBinaryExpr(">>=");
+ }
+ return nullptr;
+ case 's':
+ switch (First[1]) {
+ case 'c': {
+ First += 2;
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return T;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("static_cast", T, Ex);
+ }
+ case 'p': {
+ First += 2;
+ Node *Child = getDerived().parseExpr();
+ if (Child == nullptr)
+ return nullptr;
+ return make<ParameterPackExpansion>(Child);
+ }
+ case 'r':
+ return getDerived().parseUnresolvedName();
+ case 't': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ return make<EnclosingExpr>("sizeof (", Ty, ")");
+ }
+ case 'z': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<EnclosingExpr>("sizeof (", Ex, ")");
+ }
+ case 'Z':
+ First += 2;
+ if (look() == 'T') {
+ Node *R = getDerived().parseTemplateParam();
+ if (R == nullptr)
+ return nullptr;
+ return make<SizeofParamPackExpr>(R);
+ } else if (look() == 'f') {
+ Node *FP = getDerived().parseFunctionParam();
+ if (FP == nullptr)
+ return nullptr;
+ return make<EnclosingExpr>("sizeof... (", FP, ")");
+ }
+ return nullptr;
+ case 'P': {
+ First += 2;
+ size_t ArgsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ auto *Pack = make<NodeArrayNode>(popTrailingNodeArray(ArgsBegin));
+ if (!Pack)
+ return nullptr;
+ return make<EnclosingExpr>("sizeof... (", Pack, ")");
+ }
+ }
+ return nullptr;
+ case 't':
+ switch (First[1]) {
+ case 'e': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<EnclosingExpr>("typeid (", Ex, ")");
+ }
+ case 'i': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ return make<EnclosingExpr>("typeid (", Ty, ")");
+ }
+ case 'l': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ size_t InitsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseBracedExpr();
+ if (E == nullptr)
+ return nullptr;
+ Names.push_back(E);
+ }
+ return make<InitListExpr>(Ty, popTrailingNodeArray(InitsBegin));
+ }
+ case 'r':
+ First += 2;
+ return make<NameType>("throw");
+ case 'w': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return nullptr;
+ return make<ThrowExpr>(Ex);
+ }
+ }
+ return nullptr;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ return getDerived().parseUnresolvedName();
+ }
+
+ if (consumeIf("u8__uuidoft")) {
+ Node *Ty = getDerived().parseType();
+ if (!Ty)
+ return nullptr;
+ return make<UUIDOfExpr>(Ty);
+ }
+
+ if (consumeIf("u8__uuidofz")) {
+ Node *Ex = getDerived().parseExpr();
+ if (!Ex)
+ return nullptr;
+ return make<UUIDOfExpr>(Ex);
+ }
+
+ return nullptr;
+}
+
+// <call-offset> ::= h <nv-offset> _
+// ::= v <v-offset> _
+//
+// <nv-offset> ::= <offset number>
+// # non-virtual base override
+//
+// <v-offset> ::= <offset number> _ <virtual offset number>
+// # virtual base override, with vcall offset
+template <typename Alloc, typename Derived>
+bool AbstractManglingParser<Alloc, Derived>::parseCallOffset() {
+ // Just scan through the call offset, we never add this information into the
+ // output.
+ if (consumeIf('h'))
+ return parseNumber(true).empty() || !consumeIf('_');
+ if (consumeIf('v'))
+ return parseNumber(true).empty() || !consumeIf('_') ||
+ parseNumber(true).empty() || !consumeIf('_');
+ return true;
+}
+
+// <special-name> ::= TV <type> # virtual table
+// ::= TT <type> # VTT structure (construction vtable index)
+// ::= TI <type> # typeinfo structure
+// ::= TS <type> # typeinfo name (null-terminated byte string)
+// ::= Tc <call-offset> <call-offset> <base encoding>
+// # base is the nominal target function of thunk
+// # first call-offset is 'this' adjustment
+// # second call-offset is result adjustment
+// ::= T <call-offset> <base encoding>
+// # base is the nominal target function of thunk
+// ::= GV <object name> # Guard variable for one-time initialization
+// # No <type>
+// ::= TW <object name> # Thread-local wrapper
+// ::= TH <object name> # Thread-local initialization
+// ::= GR <object name> _ # First temporary
+// ::= GR <object name> <seq-id> _ # Subsequent temporaries
+// extension ::= TC <first type> <number> _ <second type> # construction vtable for second-in-first
+// extension ::= GR <object name> # reference temporary for object
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSpecialName() {
+ switch (look()) {
+ case 'T':
+ switch (look(1)) {
+ // TV <type> # virtual table
+ case 'V': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("vtable for ", Ty);
+ }
+ // TT <type> # VTT structure (construction vtable index)
+ case 'T': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("VTT for ", Ty);
+ }
+ // TI <type> # typeinfo structure
+ case 'I': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("typeinfo for ", Ty);
+ }
+ // TS <type> # typeinfo name (null-terminated byte string)
+ case 'S': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("typeinfo name for ", Ty);
+ }
+ // Tc <call-offset> <call-offset> <base encoding>
+ case 'c': {
+ First += 2;
+ if (parseCallOffset() || parseCallOffset())
+ return nullptr;
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr)
+ return nullptr;
+ return make<SpecialName>("covariant return thunk to ", Encoding);
+ }
+ // extension ::= TC <first type> <number> _ <second type>
+ // # construction vtable for second-in-first
+ case 'C': {
+ First += 2;
+ Node *FirstType = getDerived().parseType();
+ if (FirstType == nullptr)
+ return nullptr;
+ if (parseNumber(true).empty() || !consumeIf('_'))
+ return nullptr;
+ Node *SecondType = getDerived().parseType();
+ if (SecondType == nullptr)
+ return nullptr;
+ return make<CtorVtableSpecialName>(SecondType, FirstType);
+ }
+ // TW <object name> # Thread-local wrapper
+ case 'W': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ return make<SpecialName>("thread-local wrapper routine for ", Name);
+ }
+ // TH <object name> # Thread-local initialization
+ case 'H': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ return make<SpecialName>("thread-local initialization routine for ", Name);
+ }
+ // T <call-offset> <base encoding>
+ default: {
+ ++First;
+ bool IsVirt = look() == 'v';
+ if (parseCallOffset())
+ return nullptr;
+ Node *BaseEncoding = getDerived().parseEncoding();
+ if (BaseEncoding == nullptr)
+ return nullptr;
+ if (IsVirt)
+ return make<SpecialName>("virtual thunk to ", BaseEncoding);
+ else
+ return make<SpecialName>("non-virtual thunk to ", BaseEncoding);
+ }
+ }
+ case 'G':
+ switch (look(1)) {
+ // GV <object name> # Guard variable for one-time initialization
+ case 'V': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ return make<SpecialName>("guard variable for ", Name);
+ }
+ // GR <object name> # reference temporary for object
+ // GR <object name> _ # First temporary
+ // GR <object name> <seq-id> _ # Subsequent temporaries
+ case 'R': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ size_t Count;
+ bool ParsedSeqId = !parseSeqId(&Count);
+ if (!consumeIf('_') && ParsedSeqId)
+ return nullptr;
+ return make<SpecialName>("reference temporary for ", Name);
+ }
+ }
+ }
+ return nullptr;
+}
+
+// <encoding> ::= <function name> <bare-function-type>
+// ::= <data name>
+// ::= <special-name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseEncoding() {
+ if (look() == 'G' || look() == 'T')
+ return getDerived().parseSpecialName();
+
+ auto IsEndOfEncoding = [&] {
+ // The set of chars that can potentially follow an <encoding> (none of which
+ // can start a <type>). Enumerating these allows us to avoid speculative
+ // parsing.
+ return numLeft() == 0 || look() == 'E' || look() == '.' || look() == '_';
+ };
+
+ NameState NameInfo(this);
+ Node *Name = getDerived().parseName(&NameInfo);
+ if (Name == nullptr)
+ return nullptr;
+
+ if (resolveForwardTemplateRefs(NameInfo))
+ return nullptr;
+
+ if (IsEndOfEncoding())
+ return Name;
+
+ Node *Attrs = nullptr;
+ if (consumeIf("Ua9enable_ifI")) {
+ size_t BeforeArgs = Names.size();
+ while (!consumeIf('E')) {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ Attrs = make<EnableIfAttr>(popTrailingNodeArray(BeforeArgs));
+ if (!Attrs)
+ return nullptr;
+ }
+
+ Node *ReturnType = nullptr;
+ if (!NameInfo.CtorDtorConversion && NameInfo.EndsWithTemplateArgs) {
+ ReturnType = getDerived().parseType();
+ if (ReturnType == nullptr)
+ return nullptr;
+ }
+
+ if (consumeIf('v'))
+ return make<FunctionEncoding>(ReturnType, Name, NodeArray(),
+ Attrs, NameInfo.CVQualifiers,
+ NameInfo.ReferenceQualifier);
+
+ size_t ParamsBegin = Names.size();
+ do {
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ Names.push_back(Ty);
+ } while (!IsEndOfEncoding());
+
+ return make<FunctionEncoding>(ReturnType, Name,
+ popTrailingNodeArray(ParamsBegin),
+ Attrs, NameInfo.CVQualifiers,
+ NameInfo.ReferenceQualifier);
+}
+
+template <class Float>
+struct FloatData;
+
+template <>
+struct FloatData<float>
+{
+ static const size_t mangled_size = 8;
+ static const size_t max_demangled_size = 24;
+ static constexpr const char* spec = "%af";
+};
+
+template <>
+struct FloatData<double>
+{
+ static const size_t mangled_size = 16;
+ static const size_t max_demangled_size = 32;
+ static constexpr const char* spec = "%a";
+};
+
+template <>
+struct FloatData<long double>
+{
+#if defined(__mips__) && defined(__mips_n64) || defined(__aarch64__) || \
+ defined(__wasm__)
+ static const size_t mangled_size = 32;
+#elif defined(__arm__) || defined(__mips__) || defined(__hexagon__)
+ static const size_t mangled_size = 16;
+#else
+ static const size_t mangled_size = 20; // May need to be adjusted to 16 or 24 on other platforms
+#endif
+ static const size_t max_demangled_size = 40;
+ static constexpr const char *spec = "%LaL";
+};
+
+template <typename Alloc, typename Derived>
+template <class Float>
+Node *AbstractManglingParser<Alloc, Derived>::parseFloatingLiteral() {
+ const size_t N = FloatData<Float>::mangled_size;
+ if (numLeft() <= N)
+ return nullptr;
+ StringView Data(First, First + N);
+ for (char C : Data)
+ if (!std::isxdigit(C))
+ return nullptr;
+ First += N;
+ if (!consumeIf('E'))
+ return nullptr;
+ return make<FloatLiteralImpl<Float>>(Data);
+}
+
+// <seq-id> ::= <0-9A-Z>+
+template <typename Alloc, typename Derived>
+bool AbstractManglingParser<Alloc, Derived>::parseSeqId(size_t *Out) {
+ if (!(look() >= '0' && look() <= '9') &&
+ !(look() >= 'A' && look() <= 'Z'))
+ return true;
+
+ size_t Id = 0;
+ while (true) {
+ if (look() >= '0' && look() <= '9') {
+ Id *= 36;
+ Id += static_cast<size_t>(look() - '0');
+ } else if (look() >= 'A' && look() <= 'Z') {
+ Id *= 36;
+ Id += static_cast<size_t>(look() - 'A') + 10;
+ } else {
+ *Out = Id;
+ return false;
+ }
+ ++First;
+ }
+}
+
+// <substitution> ::= S <seq-id> _
+// ::= S_
+// <substitution> ::= Sa # ::std::allocator
+// <substitution> ::= Sb # ::std::basic_string
+// <substitution> ::= Ss # ::std::basic_string < char,
+// ::std::char_traits<char>,
+// ::std::allocator<char> >
+// <substitution> ::= Si # ::std::basic_istream<char, std::char_traits<char> >
+// <substitution> ::= So # ::std::basic_ostream<char, std::char_traits<char> >
+// <substitution> ::= Sd # ::std::basic_iostream<char, std::char_traits<char> >
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSubstitution() {
+ if (!consumeIf('S'))
+ return nullptr;
+
+ if (std::islower(look())) {
+ Node *SpecialSub;
+ switch (look()) {
+ case 'a':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::allocator);
+ break;
+ case 'b':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::basic_string);
+ break;
+ case 's':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::string);
+ break;
+ case 'i':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::istream);
+ break;
+ case 'o':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::ostream);
+ break;
+ case 'd':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::iostream);
+ break;
+ default:
+ return nullptr;
+ }
+ if (!SpecialSub)
+ return nullptr;
+ // Itanium C++ ABI 5.1.2: If a name that would use a built-in <substitution>
+ // has ABI tags, the tags are appended to the substitution; the result is a
+ // substitutable component.
+ Node *WithTags = getDerived().parseAbiTags(SpecialSub);
+ if (WithTags != SpecialSub) {
+ Subs.push_back(WithTags);
+ SpecialSub = WithTags;
+ }
+ return SpecialSub;
+ }
+
+ // ::= S_
+ if (consumeIf('_')) {
+ if (Subs.empty())
+ return nullptr;
+ return Subs[0];
+ }
+
+ // ::= S <seq-id> _
+ size_t Index = 0;
+ if (parseSeqId(&Index))
+ return nullptr;
+ ++Index;
+ if (!consumeIf('_') || Index >= Subs.size())
+ return nullptr;
+ return Subs[Index];
+}
+
+// <template-param> ::= T_ # first template parameter
+// ::= T <parameter-2 non-negative number> _
+// ::= TL <level-1> __
+// ::= TL <level-1> _ <parameter-2 non-negative number> _
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseTemplateParam() {
+ if (!consumeIf('T'))
+ return nullptr;
+
+ size_t Level = 0;
+ if (consumeIf('L')) {
+ if (parsePositiveInteger(&Level))
+ return nullptr;
+ ++Level;
+ if (!consumeIf('_'))
+ return nullptr;
+ }
+
+ size_t Index = 0;
+ if (!consumeIf('_')) {
+ if (parsePositiveInteger(&Index))
+ return nullptr;
+ ++Index;
+ if (!consumeIf('_'))
+ return nullptr;
+ }
+
+ // If we're in a context where this <template-param> refers to a
+ // <template-arg> further ahead in the mangled name (currently just conversion
+ // operator types), then we should only look it up in the right context.
+ // This can only happen at the outermost level.
+ if (PermitForwardTemplateReferences && Level == 0) {
+ Node *ForwardRef = make<ForwardTemplateReference>(Index);
+ if (!ForwardRef)
+ return nullptr;
+ assert(ForwardRef->getKind() == Node::KForwardTemplateReference);
+ ForwardTemplateRefs.push_back(
+ static_cast<ForwardTemplateReference *>(ForwardRef));
+ return ForwardRef;
+ }
+
+ if (Level >= TemplateParams.size() || !TemplateParams[Level] ||
+ Index >= TemplateParams[Level]->size()) {
+ // Itanium ABI 5.1.8: In a generic lambda, uses of auto in the parameter
+ // list are mangled as the corresponding artificial template type parameter.
+ if (ParsingLambdaParamsAtLevel == Level && Level <= TemplateParams.size()) {
+ // This will be popped by the ScopedTemplateParamList in
+ // parseUnnamedTypeName.
+ if (Level == TemplateParams.size())
+ TemplateParams.push_back(nullptr);
+ return make<NameType>("auto");
+ }
+
+ return nullptr;
+ }
+
+ return (*TemplateParams[Level])[Index];
+}
+
+// <template-param-decl> ::= Ty # type parameter
+// ::= Tn <type> # non-type parameter
+// ::= Tt <template-param-decl>* E # template parameter
+// ::= Tp <template-param-decl> # parameter pack
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseTemplateParamDecl() {
+ auto InventTemplateParamName = [&](TemplateParamKind Kind) {
+ unsigned Index = NumSyntheticTemplateParameters[(int)Kind]++;
+ Node *N = make<SyntheticTemplateParamName>(Kind, Index);
+ if (N) TemplateParams.back()->push_back(N);
+ return N;
+ };
+
+ if (consumeIf("Ty")) {
+ Node *Name = InventTemplateParamName(TemplateParamKind::Type);
+ if (!Name)
+ return nullptr;
+ return make<TypeTemplateParamDecl>(Name);
+ }
+
+ if (consumeIf("Tn")) {
+ Node *Name = InventTemplateParamName(TemplateParamKind::NonType);
+ if (!Name)
+ return nullptr;
+ Node *Type = parseType();
+ if (!Type)
+ return nullptr;
+ return make<NonTypeTemplateParamDecl>(Name, Type);
+ }
+
+ if (consumeIf("Tt")) {
+ Node *Name = InventTemplateParamName(TemplateParamKind::Template);
+ if (!Name)
+ return nullptr;
+ size_t ParamsBegin = Names.size();
+ ScopedTemplateParamList TemplateTemplateParamParams(this);
+ while (!consumeIf("E")) {
+ Node *P = parseTemplateParamDecl();
+ if (!P)
+ return nullptr;
+ Names.push_back(P);
+ }
+ NodeArray Params = popTrailingNodeArray(ParamsBegin);
+ return make<TemplateTemplateParamDecl>(Name, Params);
+ }
+
+ if (consumeIf("Tp")) {
+ Node *P = parseTemplateParamDecl();
+ if (!P)
+ return nullptr;
+ return make<TemplateParamPackDecl>(P);
+ }
+
+ return nullptr;
+}
+
+// <template-arg> ::= <type> # type or template
+// ::= X <expression> E # expression
+// ::= <expr-primary> # simple expressions
+// ::= J <template-arg>* E # argument pack
+// ::= LZ <encoding> E # extension
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseTemplateArg() {
+ switch (look()) {
+ case 'X': {
+ ++First;
+ Node *Arg = getDerived().parseExpr();
+ if (Arg == nullptr || !consumeIf('E'))
+ return nullptr;
+ return Arg;
+ }
+ case 'J': {
+ ++First;
+ size_t ArgsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ NodeArray Args = popTrailingNodeArray(ArgsBegin);
+ return make<TemplateArgumentPack>(Args);
+ }
+ case 'L': {
+ // ::= LZ <encoding> E # extension
+ if (look(1) == 'Z') {
+ First += 2;
+ Node *Arg = getDerived().parseEncoding();
+ if (Arg == nullptr || !consumeIf('E'))
+ return nullptr;
+ return Arg;
+ }
+ // ::= <expr-primary> # simple expressions
+ return getDerived().parseExprPrimary();
+ }
+ default:
+ return getDerived().parseType();
+ }
+}
+
+// <template-args> ::= I <template-arg>* E
+// extension, the abi says <template-arg>+
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseTemplateArgs(bool TagTemplates) {
+ if (!consumeIf('I'))
+ return nullptr;
+
+ // <template-params> refer to the innermost <template-args>. Clear out any
+ // outer args that we may have inserted into TemplateParams.
+ if (TagTemplates) {
+ TemplateParams.clear();
+ TemplateParams.push_back(&OuterTemplateParams);
+ OuterTemplateParams.clear();
+ }
+
+ size_t ArgsBegin = Names.size();
+ while (!consumeIf('E')) {
+ if (TagTemplates) {
+ auto OldParams = std::move(TemplateParams);
+ Node *Arg = getDerived().parseTemplateArg();
+ TemplateParams = std::move(OldParams);
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ Node *TableEntry = Arg;
+ if (Arg->getKind() == Node::KTemplateArgumentPack) {
+ TableEntry = make<ParameterPack>(
+ static_cast<TemplateArgumentPack*>(TableEntry)->getElements());
+ if (!TableEntry)
+ return nullptr;
+ }
+ TemplateParams.back()->push_back(TableEntry);
+ } else {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ }
+ return make<TemplateArgs>(popTrailingNodeArray(ArgsBegin));
+}
+
+// <mangled-name> ::= _Z <encoding>
+// ::= <type>
+// extension ::= ___Z <encoding> _block_invoke
+// extension ::= ___Z <encoding> _block_invoke<decimal-digit>+
+// extension ::= ___Z <encoding> _block_invoke_<decimal-digit>+
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parse() {
+ if (consumeIf("_Z") || consumeIf("__Z")) {
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr)
+ return nullptr;
+ if (look() == '.') {
+ Encoding = make<DotSuffix>(Encoding, StringView(First, Last));
+ First = Last;
+ }
+ if (numLeft() != 0)
+ return nullptr;
+ return Encoding;
+ }
+
+ if (consumeIf("___Z") || consumeIf("____Z")) {
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr || !consumeIf("_block_invoke"))
+ return nullptr;
+ bool RequireNumber = consumeIf('_');
+ if (parseNumber().empty() && RequireNumber)
+ return nullptr;
+ if (look() == '.')
+ First = Last;
+ if (numLeft() != 0)
+ return nullptr;
+ return make<SpecialName>("invocation function for block in ", Encoding);
+ }
+
+ Node *Ty = getDerived().parseType();
+ if (numLeft() != 0)
+ return nullptr;
+ return Ty;
+}
+
+template <typename Alloc>
+struct ManglingParser : AbstractManglingParser<ManglingParser<Alloc>, Alloc> {
+ using AbstractManglingParser<ManglingParser<Alloc>,
+ Alloc>::AbstractManglingParser;
+};
+
+DEMANGLE_NAMESPACE_END
+
+#endif // DEMANGLE_ITANIUMDEMANGLE_H
diff --git a/externals/demangle/StringView.h b/externals/demangle/StringView.h
new file mode 100644
index 000000000..44d2b18a3
--- /dev/null
+++ b/externals/demangle/StringView.h
@@ -0,0 +1,127 @@
+//===--- StringView.h -------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-FileCopyrightText: Part of the LLVM Project
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// FIXME: Use std::string_view instead when we support C++17.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DEMANGLE_STRINGVIEW_H
+#define DEMANGLE_STRINGVIEW_H
+
+#include "DemangleConfig.h"
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+
+DEMANGLE_NAMESPACE_BEGIN
+
+class StringView {
+ const char *First;
+ const char *Last;
+
+public:
+ static const size_t npos = ~size_t(0);
+
+ template <size_t N>
+ StringView(const char (&Str)[N]) : First(Str), Last(Str + N - 1) {}
+ StringView(const char *First_, const char *Last_)
+ : First(First_), Last(Last_) {}
+ StringView(const char *First_, size_t Len)
+ : First(First_), Last(First_ + Len) {}
+ StringView(const char *Str) : First(Str), Last(Str + std::strlen(Str)) {}
+ StringView() : First(nullptr), Last(nullptr) {}
+
+ StringView substr(size_t From) const {
+ return StringView(begin() + From, size() - From);
+ }
+
+ size_t find(char C, size_t From = 0) const {
+ size_t FindBegin = std::min(From, size());
+ // Avoid calling memchr with nullptr.
+ if (FindBegin < size()) {
+ // Just forward to memchr, which is faster than a hand-rolled loop.
+ if (const void *P = ::memchr(First + FindBegin, C, size() - FindBegin))
+ return size_t(static_cast<const char *>(P) - First);
+ }
+ return npos;
+ }
+
+ StringView substr(size_t From, size_t To) const {
+ if (To >= size())
+ To = size() - 1;
+ if (From >= size())
+ From = size() - 1;
+ return StringView(First + From, First + To);
+ }
+
+ StringView dropFront(size_t N = 1) const {
+ if (N >= size())
+ N = size();
+ return StringView(First + N, Last);
+ }
+
+ StringView dropBack(size_t N = 1) const {
+ if (N >= size())
+ N = size();
+ return StringView(First, Last - N);
+ }
+
+ char front() const {
+ assert(!empty());
+ return *begin();
+ }
+
+ char back() const {
+ assert(!empty());
+ return *(end() - 1);
+ }
+
+ char popFront() {
+ assert(!empty());
+ return *First++;
+ }
+
+ bool consumeFront(char C) {
+ if (!startsWith(C))
+ return false;
+ *this = dropFront(1);
+ return true;
+ }
+
+ bool consumeFront(StringView S) {
+ if (!startsWith(S))
+ return false;
+ *this = dropFront(S.size());
+ return true;
+ }
+
+ bool startsWith(char C) const { return !empty() && *begin() == C; }
+
+ bool startsWith(StringView Str) const {
+ if (Str.size() > size())
+ return false;
+ return std::equal(Str.begin(), Str.end(), begin());
+ }
+
+ const char &operator[](size_t Idx) const { return *(begin() + Idx); }
+
+ const char *begin() const { return First; }
+ const char *end() const { return Last; }
+ size_t size() const { return static_cast<size_t>(Last - First); }
+ bool empty() const { return First == Last; }
+};
+
+inline bool operator==(const StringView &LHS, const StringView &RHS) {
+ return LHS.size() == RHS.size() &&
+ std::equal(LHS.begin(), LHS.end(), RHS.begin());
+}
+
+DEMANGLE_NAMESPACE_END
+
+#endif
diff --git a/externals/demangle/Utility.h b/externals/demangle/Utility.h
new file mode 100644
index 000000000..50d05c6b1
--- /dev/null
+++ b/externals/demangle/Utility.h
@@ -0,0 +1,192 @@
+//===--- Utility.h ----------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-FileCopyrightText: Part of the LLVM Project
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Provide some utility classes for use in the demangler(s).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DEMANGLE_UTILITY_H
+#define DEMANGLE_UTILITY_H
+
+#include "StringView.h"
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <iterator>
+#include <limits>
+
+DEMANGLE_NAMESPACE_BEGIN
+
+// Stream that AST nodes write their string representation into after the AST
+// has been parsed.
+class OutputStream {
+ char *Buffer;
+ size_t CurrentPosition;
+ size_t BufferCapacity;
+
+ // Ensure there is at least n more positions in buffer.
+ void grow(size_t N) {
+ if (N + CurrentPosition >= BufferCapacity) {
+ BufferCapacity *= 2;
+ if (BufferCapacity < N + CurrentPosition)
+ BufferCapacity = N + CurrentPosition;
+ Buffer = static_cast<char *>(std::realloc(Buffer, BufferCapacity));
+ if (Buffer == nullptr)
+ std::terminate();
+ }
+ }
+
+ void writeUnsigned(uint64_t N, bool isNeg = false) {
+ // Handle special case...
+ if (N == 0) {
+ *this << '0';
+ return;
+ }
+
+ char Temp[21];
+ char *TempPtr = std::end(Temp);
+
+ while (N) {
+ *--TempPtr = '0' + char(N % 10);
+ N /= 10;
+ }
+
+ // Add negative sign...
+ if (isNeg)
+ *--TempPtr = '-';
+ this->operator<<(StringView(TempPtr, std::end(Temp)));
+ }
+
+public:
+ OutputStream(char *StartBuf, size_t Size)
+ : Buffer(StartBuf), CurrentPosition(0), BufferCapacity(Size) {}
+ OutputStream() = default;
+ void reset(char *Buffer_, size_t BufferCapacity_) {
+ CurrentPosition = 0;
+ Buffer = Buffer_;
+ BufferCapacity = BufferCapacity_;
+ }
+
+ /// If a ParameterPackExpansion (or similar type) is encountered, the offset
+ /// into the pack that we're currently printing.
+ unsigned CurrentPackIndex = std::numeric_limits<unsigned>::max();
+ unsigned CurrentPackMax = std::numeric_limits<unsigned>::max();
+
+ OutputStream &operator+=(StringView R) {
+ size_t Size = R.size();
+ if (Size == 0)
+ return *this;
+ grow(Size);
+ std::memmove(Buffer + CurrentPosition, R.begin(), Size);
+ CurrentPosition += Size;
+ return *this;
+ }
+
+ OutputStream &operator+=(char C) {
+ grow(1);
+ Buffer[CurrentPosition++] = C;
+ return *this;
+ }
+
+ OutputStream &operator<<(StringView R) { return (*this += R); }
+
+ OutputStream &operator<<(char C) { return (*this += C); }
+
+ OutputStream &operator<<(long long N) {
+ if (N < 0)
+ writeUnsigned(static_cast<unsigned long long>(-N), true);
+ else
+ writeUnsigned(static_cast<unsigned long long>(N));
+ return *this;
+ }
+
+ OutputStream &operator<<(unsigned long long N) {
+ writeUnsigned(N, false);
+ return *this;
+ }
+
+ OutputStream &operator<<(long N) {
+ return this->operator<<(static_cast<long long>(N));
+ }
+
+ OutputStream &operator<<(unsigned long N) {
+ return this->operator<<(static_cast<unsigned long long>(N));
+ }
+
+ OutputStream &operator<<(int N) {
+ return this->operator<<(static_cast<long long>(N));
+ }
+
+ OutputStream &operator<<(unsigned int N) {
+ return this->operator<<(static_cast<unsigned long long>(N));
+ }
+
+ size_t getCurrentPosition() const { return CurrentPosition; }
+ void setCurrentPosition(size_t NewPos) { CurrentPosition = NewPos; }
+
+ char back() const {
+ return CurrentPosition ? Buffer[CurrentPosition - 1] : '\0';
+ }
+
+ bool empty() const { return CurrentPosition == 0; }
+
+ char *getBuffer() { return Buffer; }
+ char *getBufferEnd() { return Buffer + CurrentPosition - 1; }
+ size_t getBufferCapacity() { return BufferCapacity; }
+};
+
+template <class T> class SwapAndRestore {
+ T &Restore;
+ T OriginalValue;
+ bool ShouldRestore = true;
+
+public:
+ SwapAndRestore(T &Restore_) : SwapAndRestore(Restore_, Restore_) {}
+
+ SwapAndRestore(T &Restore_, T NewVal)
+ : Restore(Restore_), OriginalValue(Restore) {
+ Restore = std::move(NewVal);
+ }
+ ~SwapAndRestore() {
+ if (ShouldRestore)
+ Restore = std::move(OriginalValue);
+ }
+
+ void shouldRestore(bool ShouldRestore_) { ShouldRestore = ShouldRestore_; }
+
+ void restoreNow(bool Force) {
+ if (!Force && !ShouldRestore)
+ return;
+
+ Restore = std::move(OriginalValue);
+ ShouldRestore = false;
+ }
+
+ SwapAndRestore(const SwapAndRestore &) = delete;
+ SwapAndRestore &operator=(const SwapAndRestore &) = delete;
+};
+
+inline bool initializeOutputStream(char *Buf, size_t *N, OutputStream &S,
+ size_t InitSize) {
+ size_t BufferSize;
+ if (Buf == nullptr) {
+ Buf = static_cast<char *>(std::malloc(InitSize));
+ if (Buf == nullptr)
+ return false;
+ BufferSize = InitSize;
+ } else
+ BufferSize = *N;
+
+ S.reset(Buf, BufferSize);
+ return true;
+}
+
+DEMANGLE_NAMESPACE_END
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 03:04:07 +0100