Support for @pure-unless-callable-is-impure

Author: staabm

Diff for: src/Ast/PhpDoc/PhpDocNode.php

@@ -131,6 +131,18 @@ static function (PhpDocTagValueNode $value): bool {
 		);
 	}
 
+	/**
+	 * @return PureUnlessCallableIsImpureTagValueNode[]
+	 */
+	public function getPureUnlessCallableIsImpureTagValues(string $tagName = '@pure-unless-callable-is-impure'): array
+	{
+		return array_filter(
+			array_column($this->getTagsByName($tagName), 'value'),
+			static function (PhpDocTagValueNode $value): bool {
+				return $value instanceof PureUnlessCallableIsImpureTagValueNode;
+			}
+		);
+	}
 
 	/**
 	 * @return TemplateTagValueNode[]

Diff for: src/Ast/PhpDoc/PureUnlessCallableIsImpureTagValueNode.php

@@ -0,0 +1,30 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\PhpDocParser\Ast\PhpDoc;
+
+use PHPStan\PhpDocParser\Ast\NodeAttributes;
+use function trim;
+
+class PureUnlessCallableIsImpureTagValueNode implements PhpDocTagValueNode
+{
+
+	use NodeAttributes;
+
+	/** @var string */
+	public $parameterName;
+
+	/** @var string (may be empty) */
+	public $description;
+
+	public function __construct(string $parameterName, string $description)
+	{
+		$this->parameterName = $parameterName;
+		$this->description = $description;
+	}
+
+	public function __toString(): string
+	{
+		return trim("{$this->parameterName} {$this->description}");
+	}
+
+}

Diff for: src/Parser/PhpDocParser.php

@@ -403,6 +403,11 @@ public function parseTagValue(TokenIterator $tokens, string $tag): Ast\PhpDoc\Ph
 					$tagValue = $this->parseParamClosureThisTagValue($tokens);
 					break;
 
+				case '@pure-unless-callable-is-impure':
+				case '@phpstan-pure-unless-callable-is-impure':
+					$tagValue = $this->parsePureUnlessCallableIsImpureTagValue($tokens);
+					break;
+
 				case '@var':
 				case '@phpstan-var':
 				case '@psalm-var':
@@ -919,6 +924,13 @@ private function parseParamClosureThisTagValue(TokenIterator $tokens): Ast\PhpDo
 		return new Ast\PhpDoc\ParamClosureThisTagValueNode($type, $parameterName, $description);
 	}
 
+	private function parsePureUnlessCallableIsImpureTagValue(TokenIterator $tokens): Ast\PhpDoc\PureUnlessCallableIsImpureTagValueNode
+	{
+		$parameterName = $this->parseRequiredVariableName($tokens);
+		$description = $this->parseOptionalDescription($tokens);
+
+		return new Ast\PhpDoc\PureUnlessCallableIsImpureTagValueNode($parameterName, $description);
+	}
 
 	private function parseVarTagValue(TokenIterator $tokens): Ast\PhpDoc\VarTagValueNode
 	{

Diff for: src/Printer/Printer.php

@@ -31,6 +31,7 @@
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTextNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PropertyTagValueNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\PureUnlessCallableIsImpureTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\RequireExtendsTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\RequireImplementsTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ReturnTagValueNode;
@@ -322,6 +323,9 @@ private function printTagValue(PhpDocTagValueNode $node): string
 		if ($node instanceof ParamClosureThisTagValueNode) {
 			return trim("{$node->type} {$node->parameterName} {$node->description}");
 		}
+		if ($node instanceof PureUnlessCallableIsImpureTagValueNode) {
+			return trim("{$node->parameterName} {$node->description}");
+		}
 		if ($node instanceof PropertyTagValueNode) {
 			$type = $this->printType($node->type);
 			return trim("{$type} {$node->propertyName} {$node->description}");

Diff for: tests/PHPStan/Parser/PhpDocParserTest.php

@@ -38,6 +38,7 @@
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTagNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTextNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PropertyTagValueNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\PureUnlessCallableIsImpureTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\RequireExtendsTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\RequireImplementsTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ReturnTagValueNode;
@@ -104,6 +105,7 @@ protected function setUp(): void
 	 * @dataProvider provideParamLaterInvokedCallableTagsData
 	 * @dataProvider provideTypelessParamTagsData
 	 * @dataProvider provideParamClosureThisTagsData
+	 * @dataProvider providePureUnlessCallableIsImpureTagsData
 	 * @dataProvider provideVarTagsData
 	 * @dataProvider provideReturnTagsData
 	 * @dataProvider provideThrowsTagsData
@@ -736,6 +738,37 @@ public function provideParamClosureThisTagsData(): Iterator
 		];
 	}
 
+	public function providePureUnlessCallableIsImpureTagsData(): Iterator
+	{
+		yield [
+			'OK',
+			'/** @pure-unless-callable-is-impure $foo */',
+			new PhpDocNode([
+				new PhpDocTagNode(
+					'@pure-unless-callable-is-impure',
+					new PureUnlessCallableIsImpureTagValueNode(
+						'$foo',
+						''
+					)
+				),
+			]),
+		];
+
+		yield [
+			'OK with description',
+			'/** @pure-unless-callable-is-impure $foo test two three */',
+			new PhpDocNode([
+				new PhpDocTagNode(
+					'@pure-unless-callable-is-impure',
+					new PureUnlessCallableIsImpureTagValueNode(
+						'$foo',
+						'test two three'
+					)
+				),
+			]),
+		];
+	}
+
 	public function provideVarTagsData(): Iterator
 	{
 		yield [

Diff for: tests/PHPStan/Printer/PrinterTest.php

@@ -23,6 +23,7 @@
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocTagNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\PureUnlessCallableIsImpureTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ReturnTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\TemplateTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\TypeAliasImportTagValueNode;
@@ -1782,6 +1783,24 @@ public function enterNode(Node $node)
 			},
 		];
 
+		yield [
+			'/** @pure-unless-callable-is-impure $foo test */',
+			'/** @pure-unless-callable-is-impure $bar foo */',
+			new class extends AbstractNodeVisitor {
+
+				public function enterNode(Node $node)
+				{
+					if ($node instanceof PureUnlessCallableIsImpureTagValueNode) {
+						$node->parameterName = '$bar';
+						$node->description = 'foo';
+					}
+
+					return $node;
+				}
+
+			},
+		];
+
 		yield [
 			'/** @return Foo[abc] */',
 			'/** @return self::FOO[abc] */',