Support for @param-closure-this

Author: ondrejmirtes

src/Ast/PhpDoc/ParamClosureThisTagValueNode.php

@@ -0,0 +1,35 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\PhpDocParser\Ast\PhpDoc;
+
+use PHPStan\PhpDocParser\Ast\NodeAttributes;
+use PHPStan\PhpDocParser\Ast\Type\TypeNode;
+use function trim;
+
+class ParamClosureThisTagValueNode implements PhpDocTagValueNode
+{
+
+	use NodeAttributes;
+
+	/** @var TypeNode */
+	public $type;
+
+	/** @var string */
+	public $parameterName;
+
+	/** @var string (may be empty) */
+	public $description;
+
+	public function __construct(TypeNode $type, string $parameterName, string $description)
+	{
+		$this->type = $type;
+		$this->parameterName = $parameterName;
+		$this->description = $description;
+	}
+
+	public function __toString(): string
+	{
+		return trim("{$this->type} {$this->parameterName} {$this->description}");
+	}
+
+}

src/Ast/PhpDoc/PhpDocNode.php

@@ -118,6 +118,20 @@ static function (PhpDocTagValueNode $value): bool {
 	}
 
 
+	/**
+	 * @return ParamClosureThisTagValueNode[]
+	 */
+	public function getParamClosureThisTagValues(string $tagName = '@param-closure-this'): array
+	{
+		return array_filter(
+			array_column($this->getTagsByName($tagName), 'value'),
+			static function (PhpDocTagValueNode $value): bool {
+				return $value instanceof ParamClosureThisTagValueNode;
+			}
+		);
+	}
+
+
 	/**
 	 * @return TemplateTagValueNode[]
 	 */

src/Parser/PhpDocParser.php

@@ -397,6 +397,11 @@ public function parseTagValue(TokenIterator $tokens, string $tag): Ast\PhpDoc\Ph
 					$tagValue = $this->parseParamLaterInvokedCallableTagValue($tokens);
 					break;
 
+				case '@param-closure-this':
+				case '@phpstan-param-closure-this':
+					$tagValue = $this->parseParamClosureThisTagValue($tokens);
+					break;
+
 				case '@var':
 				case '@phpstan-var':
 				case '@psalm-var':
@@ -889,6 +894,16 @@ private function parseParamLaterInvokedCallableTagValue(TokenIterator $tokens):
 	}
 
 
+	private function parseParamClosureThisTagValue(TokenIterator $tokens): Ast\PhpDoc\ParamClosureThisTagValueNode
+	{
+		$type = $this->typeParser->parse($tokens);
+		$parameterName = $this->parseRequiredVariableName($tokens);
+		$description = $this->parseOptionalDescription($tokens);
+
+		return new Ast\PhpDoc\ParamClosureThisTagValueNode($type, $parameterName, $description);
+	}
+
+
 	private function parseVarTagValue(TokenIterator $tokens): Ast\PhpDoc\VarTagValueNode
 	{
 		$type = $this->typeParser->parse($tokens);

src/Printer/Printer.php

@@ -20,6 +20,7 @@
 use PHPStan\PhpDocParser\Ast\PhpDoc\MethodTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\MethodTagValueParameterNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\MixinTagValueNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\ParamClosureThisTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamImmediatelyInvokedCallableTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamLaterInvokedCallableTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamOutTagValueNode;
@@ -312,6 +313,9 @@ private function printTagValue(PhpDocTagValueNode $node): string
 		if ($node instanceof ParamLaterInvokedCallableTagValueNode) {
 			return trim("{$node->parameterName} {$node->description}");
 		}
+		if ($node instanceof ParamClosureThisTagValueNode) {
+			return trim("{$node->type} {$node->parameterName} {$node->description}");
+		}
 		if ($node instanceof PropertyTagValueNode) {
 			$type = $this->printType($node->type);
 			return trim("{$type} {$node->propertyName} {$node->description}");

tests/PHPStan/Parser/PhpDocParserTest.php

@@ -29,6 +29,7 @@
 use PHPStan\PhpDocParser\Ast\PhpDoc\MethodTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\MethodTagValueParameterNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\MixinTagValueNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\ParamClosureThisTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamImmediatelyInvokedCallableTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamLaterInvokedCallableTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamOutTagValueNode;
@@ -102,6 +103,7 @@ protected function setUp(): void
 	 * @dataProvider provideParamImmediatelyInvokedCallableTagsData
 	 * @dataProvider provideParamLaterInvokedCallableTagsData
 	 * @dataProvider provideTypelessParamTagsData
+	 * @dataProvider provideParamClosureThisTagsData
 	 * @dataProvider provideVarTagsData
 	 * @dataProvider provideReturnTagsData
 	 * @dataProvider provideThrowsTagsData
@@ -686,6 +688,54 @@ public function provideParamLaterInvokedCallableTagsData(): Iterator
 		];
 	}
 
+	public function provideParamClosureThisTagsData(): Iterator
+	{
+		yield [
+			'OK',
+			'/** @param-closure-this Foo $a */',
+			new PhpDocNode([
+				new PhpDocTagNode(
+					'@param-closure-this',
+					new ParamClosureThisTagValueNode(
+						new IdentifierTypeNode('Foo'),
+						'$a',
+						''
+					)
+				),
+			]),
+		];
+
+		yield [
+			'OK with prefix',
+			'/** @phpstan-param-closure-this Foo $a */',
+			new PhpDocNode([
+				new PhpDocTagNode(
+					'@phpstan-param-closure-this',
+					new ParamClosureThisTagValueNode(
+						new IdentifierTypeNode('Foo'),
+						'$a',
+						''
+					)
+				),
+			]),
+		];
+
+		yield [
+			'OK with description',
+			'/** @param-closure-this Foo $a test */',
+			new PhpDocNode([
+				new PhpDocTagNode(
+					'@param-closure-this',
+					new ParamClosureThisTagValueNode(
+						new IdentifierTypeNode('Foo'),
+						'$a',
+						'test'
+					)
+				),
+			]),
+		];
+	}
+
 	public function provideVarTagsData(): Iterator
 	{
 		yield [
@@ -7185,6 +7235,7 @@ public function testReturnTypeLinesAndIndexes(string $phpDoc, array $lines): voi
 	 * @dataProvider provideTypelessParamTagsData
 	 * @dataProvider provideParamImmediatelyInvokedCallableTagsData
 	 * @dataProvider provideParamLaterInvokedCallableTagsData
+	 * @dataProvider provideParamClosureThisTagsData
 	 * @dataProvider provideVarTagsData
 	 * @dataProvider provideReturnTagsData
 	 * @dataProvider provideThrowsTagsData

tests/PHPStan/Printer/PrinterTest.php

@@ -17,6 +17,7 @@
 use PHPStan\PhpDocParser\Ast\PhpDoc\Doctrine\DoctrineArray;
 use PHPStan\PhpDocParser\Ast\PhpDoc\Doctrine\DoctrineArrayItem;
 use PHPStan\PhpDocParser\Ast\PhpDoc\MethodTagValueNode;
+use PHPStan\PhpDocParser\Ast\PhpDoc\ParamClosureThisTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamImmediatelyInvokedCallableTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamLaterInvokedCallableTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\ParamTagValueNode;
@@ -1703,6 +1704,25 @@ public function enterNode(Node $node)
 
 			},
 		];
+
+		yield [
+			'/** @param-closure-this Foo $test haha */',
+			'/** @param-closure-this Bar $taste hehe */',
+			new class extends AbstractNodeVisitor {
+
+				public function enterNode(Node $node)
+				{
+					if ($node instanceof ParamClosureThisTagValueNode) {
+						$node->type = new IdentifierTypeNode('Bar');
+						$node->parameterName = '$taste';
+						$node->description = 'hehe';
+					}
+
+					return $node;
+				}
+
+			},
+		];
 	}
 
 	/**