Method PerformAssignment

engine/Evaluator/express.cpp:2826–2916

localOnly restricts assignments to local variables.

// localOnly restricts assignments to local variables.
bool GameState::PerformAssignment(bool localOnly)
{
    // Handle `private _identifier = value` shorthand — declare the variable
    // as local before performing the assignment.
    bool declareLocal = false;
    // strncmp (not memcmp) so a buffer shorter than 7 bytes stops at the NUL.
    if (strncmp(_e->_pos, "private", 7) == 0 && !isalnumext(_e->_pos[7]))
    {
        declareLocal = true;
        _e->_pos += 7;
        vynech();
    }

    char name[MAX_EXPR_LEN];
    char* wName = name;
    if (isalphaext(*_e->_pos))
    {
        int i = 0;
        while (isalnumext(*_e->_pos))
        {
            if (i < MAX_EXPR_LEN - 1)
            {
                *wName++ = *_e->_pos, i++;
            }
            _e->_pos++;
        }
    }
    *wName = 0;
    if (!*name)
    {
        SetError(EvalBadVar);
        return false;
    }
    vynech();
    if (*_e->_pos != '=')
    {
        SetError(EvalEqu);
        return false;
    }

    strlwr(name);

    if (declareLocal)
    {
        VarLocal(name);
        localOnly = true;
    }

    if (!LValueGoodName(name))
    {
        SetError(EvalBadVar);
        return false;
    }

    _e->_pos++;
    vynech();

    GameValue value = Vyhod();