Method Execute

engine/Evaluator/express.cpp:2918–2986

}

void GameState::Execute(const char* expression)
{
    // Reentrancy guard — see Evaluate above and VyhodFrameGuard.
    VyhodFrameGuard frameGuard(*_e);

    _e->_error = EvalOK;
    _e->_errorText = RString();

    if (expression[0] == 0)
    {
        return;
    }
    _e->_pos = _e->_pos0 = expression;
    _e->_subexpBeg = expression;
    _e->_subexpEnd = expression + strlen(expression);

    while (*_e->_pos)
    {
        vynech();
        // check if expression is assignment
        // assignment must start with identifier
        _e->_subexpBeg = _e->_pos;
        if (CheckAssignment(_e->_pos))
        {
            if (!PerformAssignment())
            {
                break;
            }
        }
        else // non assignment
        {
            GameValue value = Vyhod();
            CleanStack();
            if (_e->_error)
            {
                break;
            }

            // check expression result
            // if result is nothing it's OK
            if ((value.GetType() & GameNothing) == 0)
            {
                // otherwise we may issue error
                if (_e->_checkOnly)
                {
                    TypeError(GameNothing, value.GetType());
                    break;
                }
            }
        } // single command executed
        vynech();
        char c = *_e->_pos;
        if (c == 0)
        {
            break;
        }
        if (c != ';' && (c != ',' || _e->_checkOnly))
        {