PP2::parse() - Code Metrics - Inspection of "Add ast delegates" - railt/compiler - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 957ceb...9ec3d9 )

by Kirill

created 2018-06-22 23:33 UTC

PP2::parse() A

↳ Parent: PP2

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	0
cts	4
cp	0
rs	10
c	0
b	0
f	0
cc	1
eloc	2
nc	1
nop	1
crap	2

<?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\Grammar\PP2\Lexer;
use Railt\Compiler\Grammar\PP2\Parser;
use Railt\Compiler\Reader\GrammarInterface;
use Railt\Compiler\Reader\Result;
use Railt\Io\Readable;
use Railt\Parser\Ast\LeafInterface;
use Railt\Parser\Ast\RuleInterface;

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

    /**
     * @var array
     */
    private $ast = [];

    /**
     * PP2 constructor.
     * @throws \InvalidArgumentException
     */
    public function __construct()
    {
        $this->parser = new Parser();

    }

    /**
     * @param Readable $grammar
     * @return GrammarInterface
     * @throws \LogicException
     * @throws \Railt\Io\Exception\ExternalFileException
     * @throws \Railt\Parser\Exception\UnrecognizedRuleException
     */
    public function add(Readable $grammar): GrammarInterface
    {
        /** @var RuleInterface|LeafInterface $rule */
        foreach ($this->parse($grammar) as $rule) {
            switch ($rule->getName()) {
                case 'Pragma':
                    echo \get_class($rule) . "\n";
                    break;
                case 'Include':
                    echo \get_class($rule) . "\n";
                    break;
                case 'Rule':
                    echo \get_class($rule) . "\n";
                    break;
                case 'Token':
                    echo \get_class($rule) . "\n";
                    break;
            }
        }

        return $this;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * @param Readable $grammar
     * @return RuleInterface
     * @throws \LogicException
     * @throws \Railt\Io\Exception\ExternalFileException
     * @throws \Railt\Parser\Exception\UnrecognizedRuleException
     */
    private function parse(Readable $grammar): RuleInterface
    {
        return $this->parser->parse($grammar);
    }

    /**
     * @return Result
     */
    public function make(): Result
    {
        foreach ($this->ast as $rule) {
            echo $rule . "\n\n";
        }
        die;
    }
}


1			<?php
2			/**
3			* This file is part of Railt package.
4			*
5			* For the full copyright and license information, please view the LICENSE
6			* file that was distributed with this source code.
7			*/
8			declare(strict_types=1);
9
10			namespace Railt\Compiler\Grammar;
11
12			use Railt\Compiler\Grammar\PP2\Lexer;
13			use Railt\Compiler\Grammar\PP2\Parser;
14			use Railt\Compiler\Reader\GrammarInterface;
15			use Railt\Compiler\Reader\Result;
16			use Railt\Io\Readable;
17			use Railt\Parser\Ast\LeafInterface;
18			use Railt\Parser\Ast\RuleInterface;
19
20			/**
21			* Class Grammar
22			*/
23			class PP2 implements GrammarInterface
24			{
25			/**
26			* @var PP2
27			*/
28			private $parser;
29
30			/**
31			* @var array
32			*/
33			private $ast = [];
34
35			/**
36			* PP2 constructor.
37			* @throws \InvalidArgumentException
38			*/
39			public function __construct()
40			{
41			$this->parser = new Parser();
			0 ignored issues – show Documentation Bug introduced 2018-06-21 19:12 UTC by Report Bug Copy Issue Report It seems like `new \Railt\Compiler\Grammar\PP2\Parser()` of type `object<Railt\Compiler\Grammar\PP2\Parser>` is incompatible with the declared type `object<Railt\Compiler\Grammar\PP2>` of property `$parser`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
42			}
43
44			/**
45			* @param Readable $grammar
46			* @return GrammarInterface
47			* @throws \LogicException
48			* @throws \Railt\Io\Exception\ExternalFileException
49			* @throws \Railt\Parser\Exception\UnrecognizedRuleException
50			*/
51			public function add(Readable $grammar): GrammarInterface
52			{
53			/** @var RuleInterface\|LeafInterface $rule */
54			foreach ($this->parse($grammar) as $rule) {
55			switch ($rule->getName()) {
56			case 'Pragma':
57			echo \get_class($rule) . "\n";
58			break;
59			case 'Include':
60			echo \get_class($rule) . "\n";
61			break;
62			case 'Rule':
63			echo \get_class($rule) . "\n";
64			break;
65			case 'Token':
66			echo \get_class($rule) . "\n";
67			break;
68			}
69			}
70
71			return $this;
			0 ignored issues – show Bug Best Practice introduced 2018-06-22 23:35 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`Railt\Compiler\Grammar\PP2`) is incompatible with the return type declared by the interface `Railt\Compiler\Reader\GrammarInterface::add` of type `self`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
72			}
73
74			/**
75			* @param Readable $grammar
76			* @return RuleInterface
77			* @throws \LogicException
78			* @throws \Railt\Io\Exception\ExternalFileException
79			* @throws \Railt\Parser\Exception\UnrecognizedRuleException
80			*/
81			private function parse(Readable $grammar): RuleInterface
82			{
83			return $this->parser->parse($grammar);
84			}
85
86			/**
87			* @return Result
88			*/
89			public function make(): Result
90			{
91			foreach ($this->ast as $rule) {
92			echo $rule . "\n\n";
93			}
94			die;
95			}
96			}
97

railt / compiler

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PP2::parse() A

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