quack/quack

<?php
/**
 * Quack Compiler and toolkit
 * Copyright (C) 2015-2017 Quack and CONTRIBUTORS
 *
 * This file is part of Quack.
 *
 * Quack is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Quack is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Quack.  If not, see <http://www.gnu.org/licenses/>.
 */
namespace QuackCompiler\Parselets\Types;

use \QuackCompiler\Ast\Types\ObjectType;
use \QuackCompiler\Lexer\Token;
use \QuackCompiler\Parselets\PrefixParselet;

class ObjectTypeParselet implements PrefixParselet
{
    public function parse($grammar, Token $token)
    {
        $properties = [];
        if (!$grammar->reader->is('}')) {
            do {
                $key = null;
                if ($grammar->reader->consumeIf('&(')) {
                    $next = $grammar->reader->lookahead;
                    $grammar->reader->consume();
                    $grammar->reader->match(')');
                    $name = isset($next->lexeme)
                        ? $next->lexeme
                        : $next->getTag();
                    $key = "&($name)";
                } else {
                    $key = $grammar->name_parser->_identifier();
                }
                $grammar->reader->match(':');
                $properties[$key] = $grammar->_type();
            } while ($grammar->reader->consumeIf(','));
        }
        $grammar->reader->match('}');

        return new ObjectType($properties);
    }
}