Function argcheck

Plugins/UnLuaExtensions/LuaProtobuf/Source/src/pb.cpp:245–254

}

static int argcheck(lua_State *L, int cond, int idx, const char *fmt, ...) {
    if (!cond) {
        va_list l;
        va_start(l, fmt);
        lua_pushvfstring(L, fmt, l);
        va_end(l);
        return luaL_argerror(L, idx, lua_tostring(L, -1));
    }
    return 1;
}

static pb_Slice lpb_toslice(lua_State *L, int idx) {
    int type = lua_type(L, idx);