← All results

@psalm-mutation-free

Group: Advanced PHPDoc types · Category: ecosystem · File: phpdoc_advanced_psalm_mutation_free.php

Method-level: the body must not mutate instance state. Constructors are exempt; this probes a normal method. References: - Psalm supported_annotations.md: @psalm-mutation-free

Analyzer results

AnalyzerVersionResultDiagnostics
phan 6.0.7Phan 6.0.7 php-ast version 1.1.3 PHP version used to run Phan: 8.5.9 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
phpstan 2.2.15PHPStan - PHP Static Analysis Tool 2.2.15 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
psalm 6.18.0Psalm 6.18.0@536dd6236b39a5115385b0307b42d6d1ad431a02
next: 7.0.0-beta22
Enforced (pzoom≠)
phpdoc_advanced_psalm_mutation_free.php:34: Cannot assign to a property from a mutation-free context [ImpurePropertyAssignment]
pzoom (Psalm port)

No diagnostics from pzoom.

  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
mago 1.50.0mago 1.50.0 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
mir 0.78.0mir 0.78.0 Enforced
phpdoc_advanced_psalm_mutation_free.php:34: ImmutablePropertyModification: Assigning to property value of $this in an immutable context (@psalm-immutable class or @psalm-mutation-free method) [MIR1705]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
phpantom 0.10.0phpantom_lsp 0.10.0 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
intelephense 1.18.5intelephense 1.18.5 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
phpactor 2026.06.23.0Phpactor 2026.06.23.0 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
phpy 1.0.19274phpy 1.0.19274 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
qodana 262.9437.196Qodana 262.9437.196 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
noverify 0.5.5NoVerify, version 0.5.5: built on: 2025.04.22 14:36:46 OS: r-kuchinskas arm64 Commit: 4774b82f8adc53fbef38f95e97af4b953b4d1529 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
steins 0.1.8steins 0.1.8 (2026-09-21 revision 76306a9) Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
phpstan-strict 2.2.15PHPStan - PHP Static Analysis Tool 2.2.15 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
psalm-next 7.0.0-beta22Psalm 7.0.0-beta22@de27e5724ee5997a1e3baee4d394ca6f4e46eba0 Enforced
phpdoc_advanced_psalm_mutation_free.php:34: The context allows only reading instance state but property assignment to Conformance\Tests\PhpdocAdvancedPsalmMutationFree\Counter::$value is mutating instance state [ImpurePropertyAssignment]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported

Source

<?php

declare(strict_types=1);

namespace Conformance\Tests\PhpdocAdvancedPsalmMutationFree;

/**
 * Cross-tool handling of `@psalm-mutation-free`.
 *
 * Method-level: the body must not mutate instance state. Constructors are
 * exempt; this probes a normal method.
 *
 * References:
 * - Psalm supported_annotations.md: `@psalm-mutation-free`
 */

final class Counter
{
    public int $value = 0;

    /**
     * @psalm-mutation-free
     */
    public function get(): int
    {
        return $this->value; // V
    }

    /**
     * @psalm-mutation-free
     */
    public function bump(): void // T: @psalm-mutation-free
    {
        $this->value++; // E?: property write contradicts @psalm-mutation-free
    }
}