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Non-empty list constraints

Group: Arrays and shapes · Category: phpdoc · File: arrays_non_empty_list.php

References: - PHPStan non-empty-list - Psalm list and non-empty-list

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 Pass 
arrays_non_empty_list.php:23: Argument 1 ($values) is [] of type array{} but \Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList() takes non-empty-list<int> defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/arrays_non_empty_list.php:18 [PhanTypeMismatchArgument]
phpstan 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Pass reported Lv.5+ 
arrays_non_empty_list.php:23: Parameter #1 $values of function Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList expects non-empty-list<int>, array{} given. [identifier=argument.type] [reported-from-level=5]
With strict-rules
arrays_non_empty_list.php:23: Parameter #1 $values of function Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList expects non-empty-list<int>, array{} given. [identifier=argument.type]
psalm 6.16.1Psalm 6.16.1@f1f5de594dc76faf8784e02d3dc4716c91c6f6ac
next: 7.0.0-beta19		 Pass 
arrays_non_empty_list.php:23: Argument 1 of Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList expects non-empty-list<int>, but parent type array<never, never> provided [ArgumentTypeCoercion]
mago 1.46.0mago 1.46.0 Pass 
arrays_non_empty_list.php:23: Possible argument type mismatch for argument #1 of `Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList`: expected `non-empty-list<int>`, but possibly received `array{}`. [possibly-invalid-argument]
mir 0.70.1mir 0.70.1 Pass 
arrays_non_empty_list.php:23: InvalidArgument: Argument $values of takesNonEmptyList() expects 'non-empty-list<int>', got 'array{}' [MIR0201]
phpantom 0.9.0phpantom_lsp 0.9.0 Fail

No diagnostics reported.

Expectation diff
Line 23: Expected 1 error(s)
intelephense 1.18.5intelephense 1.18.5 Fail

No diagnostics reported.

Expectation diff
Line 23: Expected 1 error(s)
phpy 0.2.0phpy 0.2.0 Fail

No diagnostics reported.

Expectation diff
Line 23: Expected 1 error(s)
qodana 262.8665.325Qodana 262.8665.325 Fail

No diagnostics reported.

Expectation diff
Line 23: Expected 1 error(s)
noverify 0.5.5NoVerify, version 0.5.5: built on: 2025.04.22 14:36:46 OS: r-kuchinskas arm64 Commit: 4774b82f8adc53fbef38f95e97af4b953b4d1529 Fail 
arrays_non_empty_list.php:18: param $values miss matched with phpdoc type <<non-empty-list<int>>> [funcParamTypeMissMatch]
Expectation diff
Line 23: Expected 1 error(s)
Line 18: Unexpected errors ["param $values miss matched with phpdoc type <<non-empty-list<int>>> [funcParamTypeMissMatch]"]
steins 0.1.5steins 0.1.5 (2026-08-12 revision 39b4cc1) Pass 
arrays_non_empty_list.php:23: argument [] to takesNonEmptyList() violates declared @param non-empty-list<int> $values — declared contract violation [phpdoc.param-mismatch]
phpstan-strict 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Pass 
arrays_non_empty_list.php:23: Parameter #1 $values of function Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList expects non-empty-list<int>, array{} given. [identifier=argument.type]
psalm-next 7.0.0-beta19Psalm 7.0.0-beta19@7e751c06a756fa64dc4c759c09fe4a173afcb433 Pass 
arrays_non_empty_list.php:23: Argument 1 of Conformance\Tests\ArraysNonEmptyList\takesNonEmptyList expects non-empty-list<int>, but parent type array<never, never> provided [ArgumentTypeCoercion]

Source

<?php

declare(strict_types=1);

namespace Conformance\Tests\ArraysNonEmptyList;

/**
 * Non-empty list constraints.
 *
 * References:
 * - PHPStan non-empty-list
 * - Psalm list and non-empty-list
 */

/**
 * @param non-empty-list<int> $values
 */
function takesNonEmptyList(array $values): void
{
}

takesNonEmptyList([1, 2, 3]);
takesNonEmptyList([]); // E: empty array is not accepted by non-empty-list<int>