Embedding Lua in D

• Download the Lua 5.0 API for D.

Thanks to Shinichiro Hamaji for submitting a patch!

• This is how I made my Lua (5.0) "Hello world" from D:
  1. Recompiled Lua with the Digital Mars C compiler. (Here're some add-on files to simplify this.)

     Any ANSI C compiler + lib tool should do, which can produce OMF libs. (I only had Lcc handy, and it did COFF, which DMC doesn't like.) You may also buy the Digital Mars Extended Utility Package and use COFF2OMF.

  2. Simply started wrapping the Lua API, like this:

     extern (C)
     {
     	alias  void* lua_State; 
     
     	lua_State lua_open();
     	void      lua_close(lua_State);
     	int       lua_baselibopen(lua_State);
     	int       lua_iolibopen(lua_State);
     
     	int       lua_gettop(lua_State);
     	void      lua_settop(lua_State, int);
     	int       lua_dostring(lua_State, char*);
     	int       lua_dofile(lua_State, char*);
     }
     

  3. The D main() looked like this (almost exactly as in C):

     void main(char[][] args)
     {
     	int res;
     
     	lua_State l = lua_open();
     	lua_baselibopen(l);
     	lua_iolibopen(l);
     
     	res = lua_dofile(l, "chunk.lua");  // '\0' appended by D to
     	                                   // such string literals
     	if (res != 0)
     	{
     		printf("couldn't read file\n");
     	}
     
     	lua_close(l);
     }
     

  4. And "chunk.lua" simply was:

     print "Hello from Lua!"
     

  5. Now, just compile and link all the stuff together:

     dmd test.d liblua.lib liblualib.lib
     

  6. That's it, works like a dream...

     Hello from Lua!
     

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