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| author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2018-12-10 13:46:03 -0200 |
|---|---|---|
| committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2018-12-10 13:46:03 -0200 |
| commit | 46beca5bed8a7700b18100fe48a78373be5055f9 (patch) | |
| tree | 499de35c048605434d9adb7ace964adf673041ac /ldblib.c | |
| parent | 28d829c86712ce5bc453feccc5129a32f78d80c0 (diff) | |
| download | lua-46beca5bed8a7700b18100fe48a78373be5055f9.tar.gz lua-46beca5bed8a7700b18100fe48a78373be5055f9.tar.bz2 lua-46beca5bed8a7700b18100fe48a78373be5055f9.zip | |
Better error messages for some polymorphic functions
New auxiliary functions/macros 'luaL_argexpected'/'luaL_typeerror'
ease the creation of error messages such as
bad argument #2 to 'setmetatable' (nil or table expected, got boolean)
(The novelty being the "got boolean" part...)
Diffstat (limited to 'ldblib.c')
| -rw-r--r-- | ldblib.c | 3 |
1 files changed, 1 insertions, 2 deletions
| @@ -55,8 +55,7 @@ static int db_getmetatable (lua_State *L) { | |||
| 55 | 55 | ||
| 56 | static int db_setmetatable (lua_State *L) { | 56 | static int db_setmetatable (lua_State *L) { |
| 57 | int t = lua_type(L, 2); | 57 | int t = lua_type(L, 2); |
| 58 | luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2, | 58 | luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table"); |
| 59 | "nil or table expected"); | ||
| 60 | lua_settop(L, 2); | 59 | lua_settop(L, 2); |
| 61 | lua_setmetatable(L, 1); | 60 | lua_setmetatable(L, 1); |
| 62 | return 1; /* return 1st argument */ | 61 | return 1; /* return 1st argument */ |