feat(reflection): add union and intersection utils (#1798)

Author: innocenzi

packages/reflection/src/TypeReflector.php

@@ -215,6 +215,16 @@ public function isNullable(): bool
         return $this->isNullable;
     }
 
+    public function isUnion(): bool
+    {
+        return str_contains($this->definition, '|');
+    }
+
+    public function isIntersection(): bool
+    {
+        return str_contains($this->definition, '&');
+    }
+
     /** @return self[] */
     public function split(): array
     {

packages/reflection/tests/ReflectionTypeTest.php

@@ -100,4 +100,24 @@ public function test_is_relation(): void
         $this->assertFalse(new TypeReflector(ImmutableString::class)->isRelation());
         $this->assertFalse(new TypeReflector(DateTimeImmutable::class)->isRelation());
     }
+
+    public function test_is_union(): void
+    {
+        $this->assertTrue(new TypeReflector('string|int')->isUnion());
+        $this->assertTrue(new TypeReflector(A::class . '|' . B::class)->isUnion());
+        $this->assertFalse(new TypeReflector('?string')->isUnion());
+        $this->assertFalse(new TypeReflector('string')->isUnion());
+        $this->assertFalse(new TypeReflector(A::class)->isUnion());
+        $this->assertFalse(new TypeReflector('string&Stringable')->isUnion());
+    }
+
+    public function test_is_intersection(): void
+    {
+        $this->assertTrue(new TypeReflector('string&Stringable')->isIntersection());
+        $this->assertTrue(new TypeReflector(A::class . '&' . B::class)->isIntersection());
+        $this->assertFalse(new TypeReflector('?string')->isIntersection());
+        $this->assertFalse(new TypeReflector('string')->isIntersection());
+        $this->assertFalse(new TypeReflector(A::class)->isIntersection());
+        $this->assertFalse(new TypeReflector('string|int')->isIntersection());
+    }
 }