VariableBuilder::isConstant() - Code Metrics - Inspection of "Add basic interpreter implementation" - railt/sdl - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Push — master ( b7ab7b...94ee03 )

by Kirill

created 2018-10-02 21:32 UTC

VariableBuilder::isConstant() A

↳ Parent: VariableBuilder

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

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

<?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\SDL\Frontend\Builder\Instruction;

use Railt\Parser\Ast\RuleInterface;
use Railt\SDL\Frontend\Builder\BaseBuilder;
use Railt\SDL\Frontend\Context\ContextInterface;

/**
 * Class VariableBuilder
 */
class VariableBuilder extends BaseBuilder
{
    /**
     * @var string[]
     */
    private const VARIABLE_DEFINITIONS = [
        'ConstantDefinition',
        'VariableDefinition',
    ];

    /**
     * @param RuleInterface $rule
     * @return bool
     */
    public function match(RuleInterface $rule): bool
    {
        return \in_array($rule->getName(), self::VARIABLE_DEFINITIONS, true);
    }

    /**
     * @param ContextInterface $ctx
     * @param RuleInterface $rule
     * @return \Generator|mixed|void
     */
    public function reduce(ContextInterface $ctx, RuleInterface $rule)
    {
        /**
         * @var bool $isConstant
         * @var mixed $value
         */
        [$isConstant, $value] = [$this->isConstant($rule), yield $this->getValue($rule)];


        foreach ($rule->find('> #VariableName') as $name) {
            $variable = $name->first('> :T_VARIABLE')->getValue(1);

            $record = $ctx->declare($variable)->set($value);

            $isConstant ? $record->lock() : $record->unlock();
        }
    }

    /**
     * @param RuleInterface $rule
     * @return mixed
     */
    private function getValue(RuleInterface $rule)
    {
        return $rule->first('> #VariableValue')->getChild(0);
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.
    }
}
    }

    /**
     * @param RuleInterface $rule
     * @return bool
     */
    private function isConstant(RuleInterface $rule): bool
    {
        return $rule->getName() === 'ConstantDefinition';
    }
}


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\SDL\Frontend\Builder\Instruction;
11
12			use Railt\Parser\Ast\RuleInterface;
13			use Railt\SDL\Frontend\Builder\BaseBuilder;
14			use Railt\SDL\Frontend\Context\ContextInterface;
15
16			/**
17			* Class VariableBuilder
18			*/
19			class VariableBuilder extends BaseBuilder
20			{
21			/**
22			* @var string[]
23			*/
24			private const VARIABLE_DEFINITIONS = [
25			'ConstantDefinition',
26			'VariableDefinition',
27			];
28
29			/**
30			* @param RuleInterface $rule
31			* @return bool
32			*/
33			public function match(RuleInterface $rule): bool
34			{
35			return \in_array($rule->getName(), self::VARIABLE_DEFINITIONS, true);
36			}
37
38			/**
39			* @param ContextInterface $ctx
40			* @param RuleInterface $rule
41			* @return \Generator\|mixed\|void
42			*/
43			public function reduce(ContextInterface $ctx, RuleInterface $rule)
44			{
45			/**
46			* @var bool $isConstant
47			* @var mixed $value
48			*/
49			[$isConstant, $value] = [$this->isConstant($rule), yield $this->getValue($rule)];
			0 ignored issues – show Bug introduced 2018-10-02 21:35 UTC by Report Bug Copy Issue Report The variable `$isConstant` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history... Bug introduced 2018-10-02 21:35 UTC by Report Bug Copy Issue Report The variable `$value` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
50
51			foreach ($rule->find('> #VariableName') as $name) {
52			$variable = $name->first('> :T_VARIABLE')->getValue(1);
53
54			$record = $ctx->declare($variable)->set($value);
55
56			$isConstant ? $record->lock() : $record->unlock();
57			}
58			}
59
60			/**
61			* @param RuleInterface $rule
62			* @return mixed
63			*/
64			private function getValue(RuleInterface $rule)
65			{
66			return $rule->first('> #VariableValue')->getChild(0);
			0 ignored issues – show Bug introduced 2018-10-02 21:35 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 `getChild()` does only exist in the following implementations of said interface: `Railt\Compiler\Grammar\Delegate\IncludeDelegate`, `Railt\Compiler\Grammar\Delegate\RuleDelegate`, `Railt\Compiler\Grammar\Delegate\TokenDelegate`, `Railt\Parser\Ast\Rule`, `Railt\SDL\Frontend\AST\Value\AbstractAstValueNode`, `Railt\SDL\Frontend\AST\Value\ConstantValueNode`, `Railt\SDL\Frontend\AST\Value\NullValueNode`, `Railt\SDL\Frontend\AST\Value\NumberValueNode`, `Railt\SDL\Frontend\AST\Value\StringValueNode`. 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...
67			}
68
69			/**
70			* @param RuleInterface $rule
71			* @return bool
72			*/
73			private function isConstant(RuleInterface $rule): bool
74			{
75			return $rule->getName() === 'ConstantDefinition';
76			}
77			}
78

railt / sdl

Push — master ( b7ab7b...94ee03 )

VariableBuilder::isConstant() A

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