Function luaL_argerror

src/Chain/libraries/glua/lauxlib.cpp:180–195

*/

LUALIB_API int luaL_argerror(lua_State *L, int arg, const char *extramsg) {
    lua_Debug ar;
    if (!lua_getstack(L, 0, &ar))  /* no stack frame? */
        return luaL_error(L, "bad argument #%d (%s)", arg, extramsg);
    lua_getinfo(L, "n", &ar);
    if (strcmp(ar.namewhat, "method") == 0) {
        arg--;  /* do not count 'self' */
        if (arg == 0)  /* error is in the self argument itself? */
            return luaL_error(L, "calling '%s' on bad self (%s)",
            ar.name, extramsg);
    }
    if (ar.name == nullptr)
        ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?";
    return luaL_error(L, "bad argument #%d to '%s' (%s)",
        arg, ar.name, extramsg);
}


static int typeerror(lua_State *L, int arg, const char *tname) {