Add support for isMatch in phpstan type ext (#26)

* Add support for isMatch in phpstan type ext

* Fix example to work around phpstan bug for now

Author: Seldaek

src/PHPStan/PregMatchParameterOutTypeExtension.php

@@ -30,7 +30,7 @@ public function isStaticMethodSupported(MethodReflection $methodReflection, Para
     {
         return
             $methodReflection->getDeclaringClass()->getName() === Preg::class
-            && $methodReflection->getName() === 'match'
+            && in_array($methodReflection->getName(), ['match', 'isMatch'], true)
             && $parameter->getName() === 'matches';
     }
 

src/PHPStan/PregMatchTypeSpecifyingExtension.php

@@ -43,7 +43,7 @@ public function getClass(): string
 
     public function isStaticMethodSupported(MethodReflection $methodReflection, StaticCall $node, TypeSpecifierContext $context): bool
     {
-        return $methodReflection->getName() === 'match' && !$context->null();
+        return in_array($methodReflection->getName(), ['match', 'isMatch'], true) && !$context->null();
     }
 
     public function specifyTypes(MethodReflection $methodReflection, StaticCall $node, Scope $scope, TypeSpecifierContext $context): SpecifiedTypes

tests/PHPStanTests/nsrt/preg-match.php

@@ -27,6 +27,13 @@ function doMatch(string $s): void
         assertType('array{}', $matches);
     }
     assertType('array{}|array{0: string, 1?: string|null}', $matches);
+
+    if (Preg::isMatch('/Price: (?<currency>£|€)\d+/', $s, $matches)) {
+        assertType('array{0: string, currency: string|null, 1: string|null}', $matches);
+    } else {
+        assertType('array{}', $matches);
+    }
+    assertType('array{}|array{0: string, currency: string|null, 1: string|null}', $matches);
 }
 
 // disabled until https://github.com/phpstan/phpstan-src/pull/3185 can be resolved