thiscall

thiscall.d

import std.traits;

// Simplified version; does not work with a large number of possible types for F
private extern(C++) interface Thiscall(F)
{
	ReturnType!F cppfunc(ParameterTypeTuple!F args);
}

auto thiscall(F, Args...)(void* _this, F func, Args args)
{
	void*[2] vtable;
	vtable[0] = _this;
	vtable[1] = func;

	auto i = cast(Thiscall!F)&vtable;

	return i.cppfunc(args);
}

void main()
{
	void* obj = null;
	int function(int) member = null;
	int a = thiscall(obj, member, 0);
}