summaryrefslogtreecommitdiffstats
path: root/src/Bindings/LuaState.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/Bindings/LuaState.h')
-rw-r--r--src/Bindings/LuaState.h52
1 files changed, 38 insertions, 14 deletions
diff --git a/src/Bindings/LuaState.h b/src/Bindings/LuaState.h
index 5b4ec3ae4..bbd0294ef 100644
--- a/src/Bindings/LuaState.h
+++ b/src/Bindings/LuaState.h
@@ -187,16 +187,37 @@ public:
void Push(cLuaUDPEndpoint * a_UDPEndpoint);
// GetStackValue() retrieves the value at a_StackPos, if it is a valid type. If not, a_Value is unchanged.
+ // Returns whether value was changed
// Enum values are clamped to their allowed range.
- void GetStackValue(int a_StackPos, AString & a_Value);
- void GetStackValue(int a_StackPos, BLOCKTYPE & a_Value);
- void GetStackValue(int a_StackPos, bool & a_Value);
- void GetStackValue(int a_StackPos, cPluginManager::CommandResult & a_Result);
- void GetStackValue(int a_StackPos, cRef & a_Ref);
- void GetStackValue(int a_StackPos, double & a_Value);
- void GetStackValue(int a_StackPos, eWeather & a_Value);
- void GetStackValue(int a_StackPos, float & a_ReturnedVal);
- void GetStackValue(int a_StackPos, int & a_Value);
+ bool GetStackValue(int a_StackPos, AString & a_Value);
+ bool GetStackValue(int a_StackPos, bool & a_Value);
+ bool GetStackValue(int a_StackPos, cPluginManager::CommandResult & a_Result);
+ bool GetStackValue(int a_StackPos, cRef & a_Ref);
+ bool GetStackValue(int a_StackPos, double & a_Value);
+ bool GetStackValue(int a_StackPos, eWeather & a_Value);
+ bool GetStackValue(int a_StackPos, float & a_ReturnedVal);
+
+ // template to catch all of the various c++ integral types without overload conflicts
+ template <class T>
+ bool GetStackValue(int a_StackPos, T & a_ReturnedVal, typename std::enable_if<std::is_integral<T>::value>::type * unused = nullptr)
+ {
+ UNUSED(unused);
+ if (lua_isnumber(m_LuaState, a_StackPos))
+ {
+ lua_Number Val = tolua_tonumber(m_LuaState, a_StackPos, a_ReturnedVal);
+ if (Val > std::numeric_limits<T>::max())
+ {
+ return false;
+ }
+ if (Val < std::numeric_limits<T>::min())
+ {
+ return false;
+ }
+ a_ReturnedVal = static_cast<T>(Val);
+ return true;
+ }
+ return false;
+ }
// Include the auto-generated Push and GetStackValue() functions:
#include "LuaState_Declaration.inc"
@@ -218,10 +239,13 @@ public:
/** Retrieves a list of values from the Lua stack, starting at the specified index. */
template <typename T, typename... Args>
- inline void GetStackValues(int a_StartStackPos, T & a_Ret, Args &&... args)
+ inline bool GetStackValues(int a_StartStackPos, T & a_Ret, Args &&... args)
{
- GetStackValue(a_StartStackPos, a_Ret);
- GetStackValues(a_StartStackPos + 1, args...);
+ if (!GetStackValue(a_StartStackPos, a_Ret))
+ {
+ return false;
+ }
+ return GetStackValues(a_StartStackPos + 1, args...);
}
/** Returns true if the specified parameters on the stack are of the specified usertable type; also logs warning if not. Used for static functions */
@@ -349,9 +373,9 @@ protected:
/** Variadic template terminator: If there are no more values to get, bail out.
This function is not available in the public API, because it's an error to request no values directly; only internal functions can do that.
If you get a compile error saying this function is not accessible, check your calling code, you aren't reading any stack values. */
- void GetStackValues(int a_StartingStackPos)
+ bool GetStackValues(int a_StartingStackPos)
{
- // Do nothing
+ return true;
}
/** Pushes the function of the specified name onto the stack.