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Accept non-string subjects with no __len metamethod in Lua 5.1.

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This commit is contained in:
Shmuel Zeigerman
2014-08-06 08:44:51 +03:00
parent 896b845053
commit 0ef80eeb34
1 changed files with 8 additions and 6 deletions
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src/algo.h
+8 -6
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@@ -135,12 +135,14 @@ static void check_subject (lua_State *L, int pos, TArgExec *argE)
argE->text = lua_touserdata (L, -1);
lua_pop (L, 1);
#if LUA_VERSION_NUM == 501
if (!luaL_callmeta (L, pos, "__len"))
luaL_argerror (L, pos, "subject has no valid __len metamethod");
if (lua_type (L, -1) != LUA_TNUMBER)
luaL_argerror (L, pos, "subject's length is not a number");
argE->textlen = lua_tointeger (L, -1);
lua_pop (L, 1);
if (luaL_callmeta (L, pos, "__len")) {
if (lua_type (L, -1) != LUA_TNUMBER)
luaL_argerror (L, pos, "subject's length is not a number");
argE->textlen = lua_tointeger (L, -1);
lua_pop (L, 1);
}
else
argE->textlen = lua_objlen (L, pos);
#else
argE->textlen = luaL_len (L, pos);
#endif