16045486657

Committed 03 Jul 2025 08:29AM UTC coverage: 94.382%. First build

Build # 16045486657

Build Type

Pull #2

github

Committed by

web-flow

Commit Message

Merge 9850cd73f into ab8883211

Pull Request Pull Request #2: Fix the build

Coverage Stats

20 of 22 new or added lines in 3 files covered. (90.91%)

84 of 89 relevant lines covered (94.38%)

25.03 hits per line

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93.18

/src/Rules/RequireGuardClausesInLoopsRule.php

<?php

/**
 * Copyright 2025 Alexey Kopytko <alexey@kopytko.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

declare(strict_types=1);

namespace Sanmai\PHPStanRules\Rules;

use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\Node\Stmt;
use PhpParser\Node\Stmt\Continue_;
use PhpParser\Node\Stmt\Do_;
use PhpParser\Node\Stmt\Expression;
use PhpParser\Node\Stmt\For_;
use PhpParser\Node\Stmt\Foreach_;
use PhpParser\Node\Stmt\If_;
use PhpParser\Node\Stmt\Return_;
use PhpParser\Node\Stmt\While_;
use PHPStan\Analyser\Scope;
use PHPStan\Rules\Rule;
use PHPStan\Rules\RuleErrorBuilder;
use Override;

use function count;
use function in_array;

/**
 * @implements Rule<Node>
 */
final class RequireGuardClausesInLoopsRule implements Rule
{
    #[Override]
    public function getNodeType(): string
    {
        return Node::class;
    }

    /**
     * @return list<\PHPStan\Rules\IdentifierRuleError>
     */
    #[Override]
    public function processNode(Node $node, Scope $scope): array
    {
        if (!$this->isLoopNode($node)) {
            return [];
        }

        $statements = $this->getLoopStatements($node);
        if (null === $statements || [] === $statements) {
            return [];
        }

        $errors = [];

        foreach ($statements as $index => $statement) {
            // Skip if it's not an if statement
            if (!$statement instanceof If_) {
                continue;
            }

            // Check if this if statement has else/elseif branches
            if (null !== $statement->else || count($statement->elseifs) > 0) {
                continue;
            }

            // Check if the if statement body contains only early returns
            if ($this->containsOnlyEarlyReturns($statement->stmts)) {
                continue;
            }

            // Check if there are statements after this if in the loop
            $hasStatementsAfter = $index < count($statements) - 1;

            // If the if body doesn't contain early returns and there are statements after it,
            // this should be a guard clause
            if ($hasStatementsAfter || count($statement->stmts) > 1) {
                $errors[] = RuleErrorBuilder::message(
                    'Use guard clauses instead of wrapping code in if statements. Consider using: if (!condition) { continue; }'
                )
                    ->identifier('sanmai.requireGuardClauses')
                    ->line($statement->getLine())
                    ->build();
            }
        }

        return $errors;
    }

    /**
     * @phpstan-assert-if-true For_|Foreach_|While_|Do_ $node
     * @psalm-assert-if-true For_|Foreach_|While_|Do_ $node
     */
    private function isLoopNode(Node $node): bool
    {
        return $node instanceof For_
            || $node instanceof Foreach_
            || $node instanceof While_
            || $node instanceof Do_;
    }

    /**
     * @return array<Stmt>|null
     */
    private function getLoopStatements(Node $node): ?array
    {
        if (!$this->isLoopNode($node)) {
            return null;
        }

        return $node->stmts;
    }

    /**
     * @param array<Stmt> $statements
     */
    private function containsOnlyEarlyReturns(array $statements): bool
    {
        if ([] === $statements) {
            return false;
        }

        foreach ($statements as $statement) {
            // Check for continue, return, break, throw
            if ($statement instanceof Continue_ || $statement instanceof Return_) {
                continue;
            }

            if ($statement instanceof Stmt\Break_) {
                continue;
            }

            /** @var Expression $statement */
            $expr = $statement->expr;

            // Check for throw expression (PHP 8+)
            if ($expr instanceof Expr\Throw_) {
                continue;
            }

            // Check for exit/die expressions
            if ($expr instanceof Expr\Exit_) {
                continue;
            }

            // Not an early return
            return false;
        }

        return true;
    }
}

1	<?php
2
3	/**
4	* Copyright 2025 Alexey Kopytko <alexey@kopytko.com>
5	*
6	* Licensed under the Apache License, Version 2.0 (the "License");
7	* you may not use this file except in compliance with the License.
8	* You may obtain a copy of the License at
9	*
10	* http://www.apache.org/licenses/LICENSE-2.0
11	*
12	* Unless required by applicable law or agreed to in writing, software
13	* distributed under the License is distributed on an "AS IS" BASIS,
14	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15	* See the License for the specific language governing permissions and
16	* limitations under the License.
17	*/
18
19	declare(strict_types=1);
20
21	namespace Sanmai\PHPStanRules\Rules;
22
23	use PhpParser\Node;
24	use PhpParser\Node\Expr;
25	use PhpParser\Node\Stmt;
26	use PhpParser\Node\Stmt\Continue_;
27	use PhpParser\Node\Stmt\Do_;
28	use PhpParser\Node\Stmt\Expression;
29	use PhpParser\Node\Stmt\For_;
30	use PhpParser\Node\Stmt\Foreach_;
31	use PhpParser\Node\Stmt\If_;
32	use PhpParser\Node\Stmt\Return_;
33	use PhpParser\Node\Stmt\While_;
34	use PHPStan\Analyser\Scope;
35	use PHPStan\Rules\Rule;
36	use PHPStan\Rules\RuleErrorBuilder;
37	use Override;
38
39	use function count;
40	use function in_array;
41
42	/**
43	* @implements Rule<Node>
44	*/
45	final class RequireGuardClausesInLoopsRule implements Rule
46	{
47	#[Override]
48	public function getNodeType(): string
49	{
50	return Node::class;	52✔
51	}
52
53	/**
54	* @return list<\PHPStan\Rules\IdentifierRuleError>
55	*/
56	#[Override]
57	public function processNode(Node $node, Scope $scope): array
58	{
59	if (!$this->isLoopNode($node)) {	52✔
60	return [];	52✔
61	}
62
63	$statements = $this->getLoopStatements($node);	48✔
64	if (null === $statements \|\| [] === $statements) {	48✔
65	return [];	×
66	}
67
68	$errors = [];	48✔
69
70	foreach ($statements as $index => $statement) {	48✔
71	// Skip if it's not an if statement
72	if (!$statement instanceof If_) {	48✔
73	continue;	48✔
74	}
75
76	// Check if this if statement has else/elseif branches
77	if (null !== $statement->else \|\| count($statement->elseifs) > 0) {	48✔
78	continue;	8✔
79	}
80
81	// Check if the if statement body contains only early returns
82	if ($this->containsOnlyEarlyReturns($statement->stmts)) {	48✔
83	continue;	24✔
84	}
85
86	// Check if there are statements after this if in the loop
87	$hasStatementsAfter = $index < count($statements) - 1;	48✔
88
89	// If the if body doesn't contain early returns and there are statements after it,
90	// this should be a guard clause
91	if ($hasStatementsAfter \|\| count($statement->stmts) > 1) {	48✔
92	$errors[] = RuleErrorBuilder::message(	48✔
93	'Use guard clauses instead of wrapping code in if statements. Consider using: if (!condition) { continue; }'	48✔
94	)	48✔
95	->identifier('sanmai.requireGuardClauses')	48✔
96	->line($statement->getLine())	48✔
97	->build();	48✔
98	}
99	}
100
101	return $errors;	48✔
102	}
103
104	/**
105	* @phpstan-assert-if-true For_\|Foreach_\|While_\|Do_ $node
106	* @psalm-assert-if-true For_\|Foreach_\|While_\|Do_ $node
107	*/
108	private function isLoopNode(Node $node): bool
109	{
110	return $node instanceof For_	52✔
111	\|\| $node instanceof Foreach_	52✔
112	\|\| $node instanceof While_	52✔
113	\|\| $node instanceof Do_;	52✔
114	}
115
116	/**
117	* @return array<Stmt>\|null
118	*/
119	private function getLoopStatements(Node $node): ?array
120	{
121	if (!$this->isLoopNode($node)) {	48✔
NEW 122	return null;	×
123	}
124
125	return $node->stmts;	48✔
126	}
127
128	/**
129	* @param array<Stmt> $statements
130	*/
131	private function containsOnlyEarlyReturns(array $statements): bool
132	{
133	if ([] === $statements) {	48✔
134	return false;	×
135	}
136
137	foreach ($statements as $statement) {	48✔
138	// Check for continue, return, break, throw
139	if ($statement instanceof Continue_ \|\| $statement instanceof Return_) {	48✔
140	continue;	28✔
141	}
142
143	if ($statement instanceof Stmt\Break_) {	48✔
144	continue;	16✔
145	}
146
147	/** @var Expression $statement */
148	$expr = $statement->expr;	48✔
149
150	// Check for throw expression (PHP 8+)
151	if ($expr instanceof Expr\Throw_) {	48✔
152	continue;	16✔
153	}
154
155	// Check for exit/die expressions
156	if ($expr instanceof Expr\Exit_) {	48✔
157	continue;	12✔
158	}
159
160	// Not an early return
161	return false;	48✔
162	}
163
164	return true;	24✔
165	}
166	}

sanmai / phpstan-rules / 16045486657

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