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Filename : AbstractParser.php

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<?php
/*
 * This file is part of the Yosymfony\ParserUtils package.
 *
 * (c) YoSymfony <http://github.com/yosymfony>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Yosymfony\ParserUtils;

abstract class AbstractParser
{
    protected $lexer;

    /**
     * Constructor
     *
     * @param LexerInterface $lexer The lexer
     */
    public function __construct(LexerInterface $lexer)
    {
        $this->lexer = $lexer;
    }

    /**
     * Parse a given input
     *
     * @param string $input
     *
     * @return mixed
     */
    public function parse(string $input)
    {
        $ts = $this->lexer->tokenize($input);
        $parseResult = $this->parseImplementation($ts);

        if ($ts->hasPendingTokens()) {
            throw new SyntaxErrorException('There are tokens not processed.');
        }

        return $parseResult;
    }

    /**
     * Do the real parsing
     *
     * @param TokenStream $stream The token stream returned by the lexer
     *
     * @return mixed
     */
    abstract protected function parseImplementation(TokenStream $stream);
}