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@psalm-allow-private-mutation with @readonly

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

Public readonly surface with private (same-class) writes still allowed. References: - Psalm supported_annotations.md: @psalm-allow-private-mutation

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 Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:28: Cannot modify read-only property \Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter->value defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/phpdoc_advanced_psalm_allow_private_mutation.php:22 [PhanAccessReadOnlyProperty]
phpdoc_advanced_psalm_allow_private_mutation.php:35: Cannot modify read-only property \Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter->value defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/phpdoc_advanced_psalm_allow_private_mutation.php:22 [PhanAccessReadOnlyProperty]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
phpstan 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Enforced reported Lv.3+
phpdoc_advanced_psalm_allow_private_mutation.php:35: @readonly property Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value is assigned outside of its declaring class. [identifier=property.readOnlyByPhpDocAssignOutOfClass] [reported-from-level=3]
With strict-rules
phpdoc_advanced_psalm_allow_private_mutation.php:35: @readonly property Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value is assigned outside of its declaring class. [identifier=property.readOnlyByPhpDocAssignOutOfClass]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
psalm 6.16.1Psalm 6.16.1@f1f5de594dc76faf8784e02d3dc4716c91c6f6ac
next: 7.0.0-beta19
Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:35: Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value is marked readonly [InaccessibleProperty]
  • Recognition: spelling resolved
  • Enforcement: 2/2 of the expected violations reported
mago 1.46.0mago 1.46.0 Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:28: Cannot modify a readonly property. [invalid-property-write]
phpdoc_advanced_psalm_allow_private_mutation.php:35: Cannot write to protected property `$value` on class `Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter`. [invalid-property-write]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
mir 0.70.1mir 0.70.1 Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:28: ReadonlyPropertyAssignment: Cannot assign to readonly property Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value outside of constructor [MIR0600]
phpdoc_advanced_psalm_allow_private_mutation.php:35: ReadonlyPropertyAssignment: Cannot assign to readonly property Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value outside of constructor [MIR0600]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
phpantom 0.9.0phpantom_lsp 0.9.0 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
phpy 0.2.0phpy 0.2.0 Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:35: Cannot modify readonly property Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
qodana 262.8665.325Qodana 262.8665.325 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 0.1.5steins 0.1.5 (2026-08-12 revision 39b4cc1) Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/1 of the expected violations reported
phpstan-strict 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:35: @readonly property Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value is assigned outside of its declaring class. [identifier=property.readOnlyByPhpDocAssignOutOfClass]
  • Recognition: spelling resolved
  • Enforcement: 1/1 of the expected violations reported
psalm-next 7.0.0-beta19Psalm 7.0.0-beta19@7e751c06a756fa64dc4c759c09fe4a173afcb433 Enforced
phpdoc_advanced_psalm_allow_private_mutation.php:35: Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation\Counter::$value is marked readonly [InaccessibleProperty]
  • Recognition: spelling resolved
  • Enforcement: 2/2 of the expected violations reported

Source

<?php

declare(strict_types=1);

namespace Conformance\Tests\PhpdocAdvancedPsalmAllowPrivateMutation;

/**
 * Cross-tool handling of `@psalm-allow-private-mutation` with `@readonly`.
 *
 * Public readonly surface with private (same-class) writes still allowed.
 *
 * References:
 * - Psalm supported_annotations.md: `@psalm-allow-private-mutation`
 */

final class Counter
{
    /**
     * @readonly
     * @psalm-allow-private-mutation
     */
    public int $value = 0; // T: @psalm-allow-private-mutation

    public function increment(): void
    {
        // Allowed under the tag (Psalm baseline). Quiet is origin-only;
        // foreign tools that treat plain @readonly as frozen are noise here.
        $this->value++; // Q?<psalm> // Q?<pzoom> // E?[noise]
    }
}

$counter = new Counter();
$counter->increment(); // V
// External write must still fail under @readonly.
$counter->value = 99; // E?: readonly property assigned outside declaring class