[PHP 8.5] Support for Closure::getCurrent()

Author: ondrejmirtes

src/Type/Php/ClosureGetCurrentDynamicReturnTypeExtension.php

@@ -0,0 +1,37 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Type\Php;
+
+use Closure;
+use PhpParser\Node\Expr\StaticCall;
+use PHPStan\Analyser\Scope;
+use PHPStan\DependencyInjection\AutowiredService;
+use PHPStan\Reflection\MethodReflection;
+use PHPStan\Type\DynamicStaticMethodReturnTypeExtension;
+use PHPStan\Type\NeverType;
+use PHPStan\Type\Type;
+
+#[AutowiredService]
+final class ClosureGetCurrentDynamicReturnTypeExtension implements DynamicStaticMethodReturnTypeExtension
+{
+
+	public function getClass(): string
+	{
+		return Closure::class;
+	}
+
+	public function isStaticMethodSupported(MethodReflection $methodReflection): bool
+	{
+		return $methodReflection->getName() === 'getCurrent';
+	}
+
+	public function getTypeFromStaticMethodCall(MethodReflection $methodReflection, StaticCall $methodCall, Scope $scope): Type
+	{
+		if (!$scope->isInAnonymousFunction()) {
+			return new NeverType();
+		}
+
+		return $scope->getAnonymousFunctionReflection();
+	}
+
+}

tests/PHPStan/Analyser/nsrt/closure-get-current.php

@@ -0,0 +1,16 @@
+<?php // lint >= 8.5
+
+namespace ClosureGetCurrent;
+
+use Closure;
+use function PHPStan\Testing\assertType;
+
+function doFoo(): void {
+	assertType('*NEVER*', Closure::getCurrent());
+}
+
+function (int $i): string {
+	assertType("Closure(int): 'foo'", Closure::getCurrent());
+
+	return 'foo';
+};