Implement Scope->getPhpVersion()

src/Analyser/MutatingScope.php

@@ -47,6 +47,7 @@
 use PHPStan\Parser\NewAssignedToPropertyVisitor;
 use PHPStan\Parser\Parser;
 use PHPStan\Php\PhpVersion;
+use PHPStan\Php\PhpVersions;
 use PHPStan\PhpDoc\Tag\TemplateTag;
 use PHPStan\Reflection\Assertions;
 use PHPStan\Reflection\Callables\CallableParametersAcceptor;
@@ -5721,4 +5722,14 @@ public function getIterableValueType(Type $iteratee): Type
 		return $iteratee->getIterableValueType();
 	}
 
+	public function getPhpVersion(): PhpVersions
+	{
+		$versionExpr = new ConstFetch(new Name('PHP_VERSION_ID'));
+		if (!$this->hasExpressionType($versionExpr)->yes()) {
+			return new PhpVersions(new ConstantIntegerType($this->phpVersion->getVersionId()));
+		}
+
+		return new PhpVersions($this->getType($versionExpr));
+	}
+
 }

src/Analyser/Scope.php

@@ -6,6 +6,7 @@
 use PhpParser\Node\Expr;
 use PhpParser\Node\Name;
 use PhpParser\Node\Param;
+use PHPStan\Php\PhpVersions;
 use PHPStan\Reflection\ClassConstantReflection;
 use PHPStan\Reflection\ClassMemberAccessAnswerer;
 use PHPStan\Reflection\ClassReflection;
@@ -136,4 +137,6 @@ public function filterByFalseyValue(Expr $expr): self;
 
 	public function isInFirstLevelStatement(): bool;
 
+	public function getPhpVersion(): PhpVersions;
+
 }

src/Php/PhpVersions.php

@@ -0,0 +1,26 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Php;
+
+use PHPStan\TrinaryLogic;
+use PHPStan\Type\IntegerRangeType;
+use PHPStan\Type\Type;
+
+/**
+ * @api
+ */
+final class PhpVersions
+{
+
+	public function __construct(
+		private Type $phpVersions,
+	)
+	{
+	}
+
+	public function producesWarningForFinalPrivateMethods(): TrinaryLogic
+	{
+		return IntegerRangeType::fromInterval(80000, null)->isSuperTypeOf($this->phpVersions)->result;
+	}
+
+}

src/Rules/Methods/FinalPrivateMethodRule.php

@@ -5,7 +5,6 @@
 use PhpParser\Node;
 use PHPStan\Analyser\Scope;
 use PHPStan\Node\InClassMethodNode;
-use PHPStan\Php\PhpVersion;
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleErrorBuilder;
 use function sprintf;
@@ -14,12 +13,6 @@
 final class FinalPrivateMethodRule implements Rule
 {
 
-	public function __construct(
-		private PhpVersion $phpVersion,
-	)
-	{
-	}
-
 	public function getNodeType(): string
 	{
 		return InClassMethodNode::class;
@@ -28,7 +21,7 @@ public function getNodeType(): string
 	public function processNode(Node $node, Scope $scope): array
 	{
 		$method = $node->getMethodReflection();
-		if (!$this->phpVersion->producesWarningForFinalPrivateMethods()) {
+		if ($scope->getPhpVersion()->producesWarningForFinalPrivateMethods()->no()) {
 			return [];
 		}
 

tests/PHPStan/Php/PhpVersionsTest.php

@@ -0,0 +1,68 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Php;
+
+use PHPStan\TrinaryLogic;
+use PHPStan\Type\Constant\ConstantIntegerType;
+use PHPStan\Type\IntegerRangeType;
+use PHPStan\Type\Type;
+use PHPStan\Type\UnionType;
+use PHPUnit\Framework\TestCase;
+
+class PhpVersionsTest extends TestCase
+{
+
+	/**
+	 * @dataProvider dataProducesWarningForFinalPrivateMethods
+	 */
+	public function testProducesWarningForFinalPrivateMethods(TrinaryLogic $expected, Type $versionType): void
+	{
+		$phpVersions = new PhpVersions($versionType);
+		$this->assertSame(
+			$expected->describe(),
+			$phpVersions->producesWarningForFinalPrivateMethods()->describe(),
+		);
+	}
+
+	public function dataProducesWarningForFinalPrivateMethods(): iterable
+	{
+		yield [
+			TrinaryLogic::createNo(),
+			new ConstantIntegerType(70400),
+		];
+
+		yield [
+			TrinaryLogic::createYes(),
+			new ConstantIntegerType(80000),
+		];
+
+		yield [
+			TrinaryLogic::createYes(),
+			new ConstantIntegerType(80100),
+		];
+
+		yield [
+			TrinaryLogic::createYes(),
+			IntegerRangeType::fromInterval(80000, null),
+		];
+
+		yield [
+			TrinaryLogic::createMaybe(),
+			IntegerRangeType::fromInterval(null, 80000),
+		];
+
+		yield [
+			TrinaryLogic::createNo(),
+			IntegerRangeType::fromInterval(70200, 70400),
+		];
+
+		yield [
+			TrinaryLogic::createMaybe(),
+			new UnionType([
+				IntegerRangeType::fromInterval(70200, 70400),
+				IntegerRangeType::fromInterval(80200, 80400),
+			]),
+		];
+	}
+
+}

tests/PHPStan/Rules/Methods/FinalPrivateMethodRuleTest.php

@@ -5,18 +5,15 @@
 use PHPStan\Php\PhpVersion;
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
+use const PHP_VERSION_ID;
 
 /** @extends RuleTestCase<FinalPrivateMethodRule> */
 class FinalPrivateMethodRuleTest extends RuleTestCase
 {
 
-	private int $phpVersionId;
-
 	protected function getRule(): Rule
 	{
-		return new FinalPrivateMethodRule(
-			new PhpVersion($this->phpVersionId),
-		);
+		return new FinalPrivateMethodRule();
 	}
 
 	public function dataRule(): array
@@ -44,8 +41,35 @@ public function dataRule(): array
 	 */
 	public function testRule(int $phpVersion, array $errors): void
 	{
-		$this->phpVersionId = $phpVersion;
+		$testVersion = new PhpVersion($phpVersion);
+		$runtimeVersion = new PhpVersion(PHP_VERSION_ID);
+
+		if (
+			$testVersion->getMajorVersionId() !== $runtimeVersion->getMajorVersionId()
+			|| $testVersion->getMinorVersionId() !== $runtimeVersion->getMinorVersionId()
+		) {
+			$this->markTestSkipped('Test requires PHP version ' . $testVersion->getMajorVersionId() . '.' . $testVersion->getMinorVersionId() . '.*');
+		}
+
 		$this->analyse([__DIR__ . '/data/final-private-method.php'], $errors);
 	}
 
+	public function testRulePhpVersions(): void
+	{
+		$this->analyse([__DIR__ . '/data/final-private-method-phpversions.php'], [
+			[
+				'Private method FinalPrivateMethodPhpVersions\FooBarPhp8orHigher::foo() cannot be final as it is never overridden by other classes.',
+				9,
+			],
+			[
+				'Private method FinalPrivateMethodPhpVersions\FooBarPhp74OrHigher::foo() cannot be final as it is never overridden by other classes.',
+				29,
+			],
+			[
+				'Private method FinalPrivateMethodPhpVersions\FooBarBaz::foo() cannot be final as it is never overridden by other classes.',
+				39,
+			],
+		]);
+	}
+
 }

tests/PHPStan/Rules/Methods/data/final-private-method-phpversions.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace FinalPrivateMethodPhpVersions;
+
+if (PHP_VERSION_ID >= 80000) {
+	class FooBarPhp8orHigher
+	{
+
+		final private function foo(): void
+		{
+		}
+	}
+}
+
+if (PHP_VERSION_ID < 80000) {
+	class FooBarPhp7
+	{
+
+		final private function foo(): void
+		{
+		}
+	}
+}
+
+if (PHP_VERSION_ID > 70400) {
+	class FooBarPhp74OrHigher
+	{
+
+		final private function foo(): void
+		{
+		}
+	}
+}
+
+if (PHP_VERSION_ID < 70400 || PHP_VERSION_ID >= 80100) {
+	class FooBarBaz
+	{
+
+		final private function foo(): void
+		{
+		}
+	}
+}