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

Test Failed

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by Kirill

created 2018-10-02 21:32 UTC

TypeInvocationBuilder::match() A

↳ Parent: TypeInvocationBuilder

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\Value;

use Railt\Parser\Ast\RuleInterface;
use Railt\SDL\Frontend\Builder\BaseBuilder;
use Railt\SDL\Frontend\Context\ContextInterface;
use Railt\SDL\IR\SymbolTable\TypeInvocationPrimitive;
use Railt\SDL\IR\SymbolTable\Value;
use Railt\SDL\IR\SymbolTable\ValueInterface;
use Railt\SDL\IR\Type;
use Railt\SDL\IR\Type\Name;

/**
 * Class TypeInvocationBuilder
 */
class TypeInvocationBuilder extends BaseBuilder
{
    /**
     * @param RuleInterface $rule
     * @return bool
     */
    public function match(RuleInterface $rule): bool
    {
        return $rule->getName() === 'TypeInvocation';
    }

    /**
     * @param ContextInterface $ctx
     * @param RuleInterface $rule
     * @return \Generator|ValueInterface
     */
    public function reduce(ContextInterface $ctx, RuleInterface $rule): \Generator
    {
        /** @var ValueInterface $value */
        $value = yield $rule->first('> #GenericInvocationName')->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.
    }
}

        $name = Name::new((string)$value->getValue());

        // TODO Add arguments

        return new Value(new TypeInvocationPrimitive($name, $ctx), Type::type());

    }
}


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\Value;
11
12			use Railt\Parser\Ast\RuleInterface;
13			use Railt\SDL\Frontend\Builder\BaseBuilder;
14			use Railt\SDL\Frontend\Context\ContextInterface;
15			use Railt\SDL\IR\SymbolTable\TypeInvocationPrimitive;
16			use Railt\SDL\IR\SymbolTable\Value;
17			use Railt\SDL\IR\SymbolTable\ValueInterface;
18			use Railt\SDL\IR\Type;
19			use Railt\SDL\IR\Type\Name;
20
21			/**
22			* Class TypeInvocationBuilder
23			*/
24			class TypeInvocationBuilder extends BaseBuilder
25			{
26			/**
27			* @param RuleInterface $rule
28			* @return bool
29			*/
30			public function match(RuleInterface $rule): bool
31			{
32			return $rule->getName() === 'TypeInvocation';
33			}
34
35			/**
36			* @param ContextInterface $ctx
37			* @param RuleInterface $rule
38			* @return \Generator\|ValueInterface
39			*/
40			public function reduce(ContextInterface $ctx, RuleInterface $rule): \Generator
41			{
42			/** @var ValueInterface $value */
43			$value = yield $rule->first('> #GenericInvocationName')->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...
44
45			$name = Name::new((string)$value->getValue());
46
47			// TODO Add arguments
48
49			return new Value(new TypeInvocationPrimitive($name, $ctx), Type::type());
			0 ignored issues – show Bug introduced 2018-10-02 21:35 UTC by Report Bug Copy Issue Report The method `type()` does not seem to exist on `object<Railt\SDL\IR\Type>`. This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces. This is most likely a typographical error or the method has been renamed. Loading history...
50			}
51			}
52

railt / sdl

Push — master ( b7ab7b...94ee03 )

TypeInvocationBuilder::match() A

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