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functions must return explicit `nil' on failure

This commit is contained in:
Roberto Ierusalimschy 2000-04-14 14:44:20 -03:00
parent d76b1a0eef
commit 4aa9ad6514
2 changed files with 9 additions and 5 deletions
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10
lbuiltin.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lbuiltin.c,v 1.103 2000/04/13 16:46:43 roberto Exp roberto $
** $Id: lbuiltin.c,v 1.104 2000/04/13 18:08:18 roberto Exp roberto $
** Built-in functions
** See Copyright Notice in lua.h
*/
@ -223,7 +223,7 @@ void luaB_newtag (lua_State *L) {
void luaB_copytagmethods (lua_State *L) {
lua_pushnumber(L, lua_copytagmethods(L, luaL_check_int(L, 1),
luaL_check_int(L, 2)));
luaL_check_int(L, 2)));
}
void luaB_rawgettable (lua_State *L) {
@ -296,7 +296,8 @@ void luaB_dostring (lua_State *L) {
lua_error(L, "`dostring' cannot run pre-compiled code");
if (lua_dobuffer(L, s, l, luaL_opt_string(L, 2, s)) == 0)
passresults(L);
/* else return no value */
else
lua_pushnil(L);
}
@ -304,7 +305,8 @@ void luaB_dofile (lua_State *L) {
const char *fname = luaL_opt_string(L, 1, NULL);
if (lua_dofile(L, fname) == 0)
passresults(L);
/* else return no value */
else
lua_pushnil(L);
}

4
ldblib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ldblib.c,v 1.11 2000/03/03 14:58:26 roberto Exp roberto $
** $Id: ldblib.c,v 1.12 2000/03/30 17:19:48 roberto Exp roberto $
** Interface from Lua to its debug API
** See Copyright Notice in lua.h
*/
@ -88,6 +88,7 @@ static void getlocal (lua_State *L) {
lua_pushstring(L, lvar.name);
lua_pushobject(L, lvar.value);
}
else lua_pushnil(L);
}
@ -100,6 +101,7 @@ static void setlocal (lua_State *L) {
lvar.value = luaL_nonnullarg(L, 3);
if (lua_setlocal(L, &ar, &lvar))
lua_pushstring(L, lvar.name);
else lua_pushnil(L);
}