D callbacks in C functions
- by Caspin
I am writing D2 bindings for Lua. This is in one of the Lua header files.
typedef int (*lua_CFunction) (lua_State *L);
I assume the equivalent D2 statement would be:
extern(C) alias int function( lua_State* L ) lua_CFunction;
Lua also provides an api function:
void lua_pushcfunction( lua_State* L, string name, lua_CFunction func );
If I want to push a D2 function does it have to be extern(C) or can I just use the function?
int dfunc( lua_State* L )
{
std.stdio.writeln("dfunc");
}
extern(C) int cfunc( lua_State* L )
{
std.stdio.writeln("cfunc");
}
lua_State* L = lua_newstate();
lua_pushcfunction(L, "cfunc", &cfunc); //This will definitely work.
lua_pushcfunction(L, "dfunc", &dfunc); //Will this work?
If I can only use cfunc, why? I don't need to do anything like that in C++. I can just pass the address of a C++ function to C and everything just works.
