RuleDelegate::reduce() - Code Metrics - Inspection of "upd" - railt/compiler - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( db8578...85f9c3 )

by Kirill

created 2018-06-26 11:19 UTC

RuleDelegate::reduce() A

↳ Parent: RuleDelegate

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	0
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\PP2\Delegate;

use Railt\Parser\Ast\NodeInterface;
use Railt\Parser\Ast\Rule;
use Railt\Parser\Ast\RuleInterface;
use Railt\Parser\Rule\Symbol;

/**
 * Class RuleDelegate
 */
class RuleDelegate extends Rule implements ProvidesChildrenSymbol
{
    /**
     * @return string
     */
    public function getRuleName(): string
    {
        return $this->name()->first('T_NAME')->getValue();
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
    }

    /**
     * @return null|string
     */
    public function getDelegate(): ?string
    {
        $delegate = $this->name()->first('Delegate');
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

        return $delegate ? $delegate->first('T_NAME')->getValue() : null;
    }

    /**
     * @return RuleInterface|NodeInterface
     */
    private function name(): RuleInterface
    {
        return $this->first('Name');
    }

    /**
     * @return bool
     */
    public function isKept(): bool
    {
        return $this->name()->first('ShouldKeep') !== null;
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
    }

    /**
     * @return iterable
     */
    public function getChildrenRules(): iterable
    {
        return $this->getProduction()->getChildrenRules();
    }

    /**
     * @return Symbol
     */
    public function getRule(): Symbol
    {
        return $this->getProduction()->getRule();
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * @return ProvidesSymbol|ConcatenationDelegate|NodeInterface
     */
    private function getProduction(): ProvidesSymbol
    {
        return $this->first('Production');
    }
}


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\PP2\Delegate;
11
12			use Railt\Parser\Ast\NodeInterface;
13			use Railt\Parser\Ast\Rule;
14			use Railt\Parser\Ast\RuleInterface;
15			use Railt\Parser\Rule\Symbol;
16
17			/**
18			* Class RuleDelegate
19			*/
20			class RuleDelegate extends Rule implements ProvidesChildrenSymbol
21			{
22			/**
23			* @return string
24			*/
25			public function getRuleName(): string
26			{
27			return $this->name()->first('T_NAME')->getValue();
			0 ignored issues – show Bug introduced 2018-06-26 11:30 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Railt\Parser\Ast\NodeInterface` as the method `first()` does only exist in the following implementations of said interface: `Railt\Compiler\Grammar\P...legate\BaseRuleDelegate`, `Railt\Compiler\Grammar\P...e\ConcatenationDelegate`, `Railt\Compiler\Grammar\P...elegate\IncludeDelegate`, `Railt\Compiler\Grammar\P...gate\InvocationDelegate`, `Railt\Compiler\Grammar\P...ragmaDefinitionDelegate`, `Railt\Compiler\Grammar\P...gate\RepetitionDelegate`, `Railt\Compiler\Grammar\PP2\Delegate\RuleDelegate`, `Railt\Compiler\Grammar\P...TokenDefinitionDelegate`, `Railt\Parser\Ast\Rule`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
28			}
29
30			/**
31			* @return null\|string
32			*/
33			public function getDelegate(): ?string
34			{
35			$delegate = $this->name()->first('Delegate');
			0 ignored issues – show Bug introduced 2018-06-26 11:30 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Railt\Parser\Ast\NodeInterface` as the method `first()` does only exist in the following implementations of said interface: `Railt\Compiler\Grammar\P...legate\BaseRuleDelegate`, `Railt\Compiler\Grammar\P...e\ConcatenationDelegate`, `Railt\Compiler\Grammar\P...elegate\IncludeDelegate`, `Railt\Compiler\Grammar\P...gate\InvocationDelegate`, `Railt\Compiler\Grammar\P...ragmaDefinitionDelegate`, `Railt\Compiler\Grammar\P...gate\RepetitionDelegate`, `Railt\Compiler\Grammar\PP2\Delegate\RuleDelegate`, `Railt\Compiler\Grammar\P...TokenDefinitionDelegate`, `Railt\Parser\Ast\Rule`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
36
37			return $delegate ? $delegate->first('T_NAME')->getValue() : null;
38			}
39
40			/**
41			* @return RuleInterface\|NodeInterface
42			*/
43			private function name(): RuleInterface
44			{
45			return $this->first('Name');
46			}
47
48			/**
49			* @return bool
50			*/
51			public function isKept(): bool
52			{
53			return $this->name()->first('ShouldKeep') !== null;
			0 ignored issues – show Bug introduced 2018-06-26 11:30 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Railt\Parser\Ast\NodeInterface` as the method `first()` does only exist in the following implementations of said interface: `Railt\Compiler\Grammar\P...legate\BaseRuleDelegate`, `Railt\Compiler\Grammar\P...e\ConcatenationDelegate`, `Railt\Compiler\Grammar\P...elegate\IncludeDelegate`, `Railt\Compiler\Grammar\P...gate\InvocationDelegate`, `Railt\Compiler\Grammar\P...ragmaDefinitionDelegate`, `Railt\Compiler\Grammar\P...gate\RepetitionDelegate`, `Railt\Compiler\Grammar\PP2\Delegate\RuleDelegate`, `Railt\Compiler\Grammar\P...TokenDefinitionDelegate`, `Railt\Parser\Ast\Rule`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
54			}
55
56			/**
57			* @return iterable
58			*/
59			public function getChildrenRules(): iterable
60			{
61			return $this->getProduction()->getChildrenRules();
62			}
63
64			/**
65			* @return Symbol
66			*/
67			public function getRule(): Symbol
68			{
69			return $this->getProduction()->getRule();
			0 ignored issues – show Bug introduced 2018-06-26 11:30 UTC by Report Bug Copy Issue Report The method `getRule` does only exist in `Railt\Compiler\Grammar\PP2\Delegate\ProvidesSymbol`, but not in `Railt\Parser\Ast\NodeInterface`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
70			}
71
72			/**
73			* @return ProvidesSymbol\|ConcatenationDelegate\|NodeInterface
74			*/
75			private function getProduction(): ProvidesSymbol
76			{
77			return $this->first('Production');
78			}
79			}
80

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Push — master ( db8578...85f9c3 )

RuleDelegate::reduce() A

Complexity

Size

Duplication

Code Coverage

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Available Fixes

Available Fixes

Available Fixes

Available Fixes

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