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'assert' checks that it has (at least) one parameter + 'assert' ensures 

it passes only one value to 'error'
This commit is contained in:
Roberto Ierusalimschy 2014-12-08 13:26:55 -02:00
parent ab4a890d04
commit 594d7266af
1 changed files with 5 additions and 4 deletions
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9
lbaselib.c
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@ -1,5 +1,5 @@
/* /*
** $Id: lbaselib.c,v 1.306 2014/11/02 19:19:04 roberto Exp roberto $ ** $Id: lbaselib.c,v 1.307 2014/11/10 14:25:52 roberto Exp roberto $
** Basic library ** Basic library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -388,9 +388,10 @@ static int luaB_assert (lua_State *L) {
if (lua_toboolean(L, 1)) /* condition is true? */ if (lua_toboolean(L, 1)) /* condition is true? */
return lua_gettop(L); /* return all arguments */ return lua_gettop(L); /* return all arguments */
else { /* error */ else { /* error */
if (lua_isnone(L, 2)) /* no error message? */ luaL_checkany(L, 1); /* there must be a condition */
lua_pushliteral(L, "assertion failed!"); /* use standard message */ lua_remove(L, 1); /* remove it */
lua_remove(L, 1); /* remove the condition (if there is one...) */ lua_pushliteral(L, "assertion failed!"); /* default message */
lua_settop(L, 1); /* leave only message (default if no other one) */
return luaB_error(L); /* call 'error' */ return luaB_error(L); /* call 'error' */
} }
} }