Re: partially define a table in C++, and partially in script
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- Subject: Re: partially define a table in C++, and partially in script
- From: Shea Martin <shea08@...>
- Date: 2007年2月06日 12:18:48 -0400
Sorry to be dense, but I am still not following.
My lua script is simply this:
function Event:start()
self:log( self.name .. " started" )
end
My C is something like this:
if( luaL_newmetatable( vm, "Event.mt" ) )
{
//trying to duplicat this functionality
//Event = {}
//Event.mt = {}
//
//function Event:new( pname )
// Event.mt.__index = Event
// return setmetatable({ name = pname }, Event.mt)
//end
//the following two lines are yours
//I am not quite sure fo their purpose
lua_pushvalue( vm, -1 ); //put mt on stack
lua_setfield( vm, -2, "__index" );
//this is what makes sense to me
//but it does not work either
lua_pushstring( vm, "Event" );
lua_pushstring( vm, "__index" );
lua_settable( vm, -3 );
}
lua_newtable( vm );
lua_pushstring( vm, "Event:log" );
lua_pushcclosure( vm, l_event_log, 0 );
lua_settable( vm, -3 );
lua_pushstring( vm, "Event:name" );
lua_pushstring( vm, eventname );
lua_settable( vm, -3 );
lua_setmetatable( vm, -2 );
luaL_dofile( vm, "test.lua" );
lua_getfield( vm, LUA_-1, "Event:start" );
lua_pcall( vm, 1, 2, 0 );
When I run my code, I get this interpreter error: " attempt to index
global 'Event' (a nil value)".
I am a little lost, this being my first work with and dynamically
prototyped language, and also having to explicitly manage the stack.
~S