Support for cast in constant expressions

Author: kukulich

src/NodeCompiler/CompileNodeToValue.php

@@ -140,6 +140,30 @@ public function __invoke(Node $node, CompilerContext $context): CompiledValue
                 return $this->getEnumPropertyValue($node, $context);
             }
 
+            if ($node instanceof Node\Expr\Cast\Int_) {
+                return (int) $this($node->expr, $context)->value;
+            }
+
+            if ($node instanceof Node\Expr\Cast\Double) {
+                return (float) $this($node->expr, $context)->value;
+            }
+
+            if ($node instanceof Node\Expr\Cast\Bool_) {
+                return (bool) $this($node->expr, $context)->value;
+            }
+
+            if ($node instanceof Node\Expr\Cast\String_) {
+                return (string) $this($node->expr, $context)->value;
+            }
+
+            if ($node instanceof Node\Expr\Cast\Array_) {
+                return (array) $this($node->expr, $context)->value;
+            }
+
+            if ($node instanceof Node\Expr\Cast\Object_) {
+                return (object) $this($node->expr, $context)->value;
+            }
+
             throw Exception\UnableToCompileNode::forUnRecognizedExpressionInContext($node, $context);
         });
 

test/unit/NodeCompiler/CompileNodeToValueTest.php

@@ -36,6 +36,7 @@
 use Roave\BetterReflectionTest\Fixture\MagicConstantsClass;
 use Roave\BetterReflectionTest\Fixture\MagicConstantsInPropertyHooks;
 use Roave\BetterReflectionTest\Fixture\MagicConstantsTrait;
+use stdClass;
 
 use function assert;
 use function define;
@@ -200,6 +201,11 @@ public static function nodeProvider(): array
             ['4 <=> 1', 1],
             ['1 <=> 1', 0],
             ['5 ?? 4', 5],
+            ['(int) true', 1],
+            ['(float) true', 1.0],
+            ['(string) true', '1'],
+            ['(bool) 1', true],
+            ['(array) 1', [1]],
         ];
     }
 
@@ -1127,6 +1133,15 @@ public function testMagicConstantsInPropertyHooks(string $propertyName, mixed $e
         self::assertSame($expectedValue, $getHookParameterAttribute->getArguments()[0]);
     }
 
+    public function testObjectCast(): void
+    {
+        $node = $this->parseCode('(object) []');
+
+        $compiledValue = (new CompileNodeToValue())->__invoke($node, $this->getDummyContext());
+
+        self::assertInstanceOf(stdClass::class, $compiledValue->value);
+    }
+
     /** @return non-empty-string */
     private static function realPath(string $path): string
     {