Railt\Compiler\Grammar\PP2

Complexity

Total Complexity

12

Size/Duplication

Total Lines	97
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	8

Test Coverage

Coverage

0%

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	add()	0	9	2
B	lex()	0	22	5
A	include()	0	15	3
A	make()	0	4	1

<?php
/**
 * This file is part of Railt package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace Railt\Compiler\Grammar;

use Railt\Compiler\Exception\IncludeNotFoundException;
use Railt\Compiler\Exception\UnrecognizedTokenException;
use Railt\Compiler\Grammar\PP2\Lexer;
use Railt\Compiler\Grammar\PP2\Parser;
use Railt\Compiler\Reader\GrammarInterface;
use Railt\Compiler\Reader\Result;
use Railt\Io\File;
use Railt\Io\Readable;
use Railt\Lexer\LexerInterface;
use Railt\Lexer\Result\Eoi;
use Railt\Lexer\Result\Unknown;
use Railt\Lexer\TokenInterface;

/**
 * Class Grammar
 */
class PP2 implements GrammarInterface
{
    /**
     * @var LexerInterface
     */
    private $lexer;

    /**
     * @var PP2
     */
    private $parser;

    /**
     * Reader constructor.
     */
    public function __construct()
    {
        $this->lexer  = new Lexer();
        $this->parser = new Parser();

It seems like new \Railt\Compiler\Grammar\PP2\Parser() of type object<Railt\Compiler\Grammar\PP2\Parser> is incompatible with the declared type object<Railt\Compiler\Grammar\PP2> of property $parser.

    }

    /**
     * @param Readable $input
     * @return GrammarInterface
     * @throws \Railt\Io\Exception\ExternalFileException
     * @throws \Railt\Io\Exception\NotReadableException
     */
    public function add(Readable $input): GrammarInterface
    {
        /** @var Readable $file */
        foreach ($this->lex($input) as $file => $token) {
            $this->parser->process($file, $token);

The method process() does not seem to exist on object<Railt\Compiler\Grammar\PP2>.

        }

        return $this;
    }

    /**
     * @param Readable $input
     * @return \Traversable
     * @throws \Railt\Io\Exception\NotReadableException
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    private function lex(Readable $input): \Traversable
    {
        $tokens = $this->lexer->lex($input);

        foreach ($tokens as $token) {
            if ($token instanceof Unknown) {
                $error = \sprintf('Unrecognized token "%s" (%s)', $token->value(), $token->name());
                throw (new UnrecognizedTokenException($error))->throwsIn($input, $token->offset());
            }

            if ($token instanceof Eoi) {
                continue;
            }

            if ($token->name() === Lexer::T_INCLUDE) {
                yield from $this->lex($this->include($input, $token));
                continue;
            }

            yield $input => $token;
        }
    }

    /**
     * @param Readable $from
     * @param TokenInterface $token
     * @return Readable
     * @throws \Railt\Io\Exception\NotReadableException
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    private function include(Readable $from, TokenInterface $token): Readable
    {
        $path = \trim($token->value(1), " \t\n\r\0\x0B\"'");

        foreach (['.pp2', ''] as $extension) {
            $file = \dirname($from->getPathname()) . '/' . $path . $extension;

            if (\is_file($file)) {
                return File::fromPathname($file);
            }
        }

        $error = \sprintf('Could not read external grammar file "%s"', $path);
        throw (new IncludeNotFoundException($error))->throwsIn($from, $token->offset());
    }

    /**
     * @return Result
     */
    public function make(): Result
    {
        return $this->parser->getResult();

The method getResult() does not seem to exist on object<Railt\Compiler\Grammar\PP2>.

    }
}