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new macro luaL_opt to avoid evaluating defaults when no needed

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Roberto Ierusalimschy
2005-10-21 11:47:42 -02:00
parent 9f4211310f
commit 053e873145
5 changed files with 17 additions and 21 deletions
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10
lauxlib.c
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@@ -1,5 +1,5 @@
/*
** $Id: lauxlib.c,v 1.154 2005/10/19 13:05:11 roberto Exp roberto $
** $Id: lauxlib.c,v 1.155 2005/10/20 11:35:25 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@@ -176,8 +176,7 @@ LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
if (lua_isnoneornil(L, narg)) return def;
else return luaL_checknumber(L, narg);
return luaL_opt(L, luaL_checknumber, narg, def);
}
@@ -190,9 +189,8 @@ LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) {
LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg,
lua_Integer def) {
if (lua_isnoneornil(L, narg)) return def;
else return luaL_checkinteger(L, narg);
lua_Integer def) {
return luaL_opt(L, luaL_checkinteger, narg, def);
}