Specifies the
Thiscall calling convention in a member procedure declaration
Syntax
Description
In member procedure declarations,
__Thiscall specifies that a procedure will use the
Thiscall calling convention. In the
Thiscall calling convention, the implicit and hidden
This parameter is passed in the
ECX register.
The
Thiscall calling convention is for 32-bit x86 targets only and is only partially implemented. It should work when using
-gen gcc backend, but as of fbc-1.08.0, it is not implemented for the
-gen gas backed.
It is not needed for normal fbc usage, and would typically only be needed for linking to and using g++/c++ libraries.
Example
'' __thiscall only makes sense on windows 32-bit
#if defined(__FB_WIN32__) And Not defined(__FB_64BIT__)
#define thiscall __Thiscall
#else
#define thiscall
#endif
Extern "c++"
Type UDT
value As Long
'' fbc doesn't automatically add the __thiscall calling convention
'' therefore, currently needs to be explicitly given where needed
Declare Constructor thiscall ()
Declare Destructor thiscall ()
Declare Sub someproc thiscall ()
'' etc
End Type
End Extern
Version
Differences from QB
See also