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new functions lua_getfield' and lua_setfield'

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Roberto Ierusalimschy
2003-10-10 09:57:55 -03:00
parent a41d60e1d1
commit 533737f26e
7 changed files with 70 additions and 66 deletions
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20
lbaselib.c
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@@ -1,5 +1,5 @@
/*
** $Id: lbaselib.c,v 1.133 2003/08/27 21:02:08 roberto Exp roberto $
** $Id: lbaselib.c,v 1.134 2003/10/07 20:13:41 roberto Exp roberto $
** Basic library
** See Copyright Notice in lua.h
*/
@@ -220,8 +220,7 @@ static int luaB_next (lua_State *L) {
static int luaB_pairs (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
lua_pushliteral(L, "next");
lua_rawget(L, LUA_GLOBALSINDEX); /* return generator, */
lua_getfield(L, LUA_GLOBALSINDEX, "next"); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushnil(L); /* and initial value */
return 3;
@@ -232,8 +231,7 @@ static int luaB_ipairs (lua_State *L) {
int i = (int)lua_tointeger(L, 2);
luaL_checktype(L, 1, LUA_TTABLE);
if (i == 0 && lua_isnone(L, 2)) { /* `for' start? */
lua_pushliteral(L, "ipairs");
lua_rawget(L, LUA_GLOBALSINDEX); /* return generator, */
lua_getfield(L, LUA_GLOBALSINDEX, "ipairs"); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushinteger(L, 0); /* and initial value */
return 3;
@@ -693,23 +691,19 @@ static const luaL_reg co_funcs[] = {
static void base_open (lua_State *L) {
lua_pushliteral(L, "_G");
lua_pushvalue(L, LUA_GLOBALSINDEX);
luaL_openlib(L, NULL, base_funcs, 0); /* open lib into global table */
lua_pushliteral(L, "_VERSION");
lua_pushliteral(L, LUA_VERSION);
lua_rawset(L, -3); /* set global _VERSION */
lua_setfield(L, -2, "_VERSION"); /* set global _VERSION */
/* `newproxy' needs a weaktable as upvalue */
lua_pushliteral(L, "newproxy");
lua_newtable(L); /* new table `w' */
lua_pushvalue(L, -1); /* `w' will be its own metatable */
lua_setmetatable(L, -2);
lua_pushliteral(L, "__mode");
lua_pushliteral(L, "kv");
lua_rawset(L, -3); /* metatable(w).__mode = "kv" */
lua_setfield(L, -2, "__mode"); /* metatable(w).__mode = "kv" */
lua_pushcclosure(L, luaB_newproxy, 1);
lua_rawset(L, -3); /* set global `newproxy' */
lua_rawset(L, -1); /* set global _G */
lua_setfield(L, -2, "newproxy"); /* set global `newproxy' */
lua_setfield(L, -1, "_G"); /* set global _G */
}