Add GMP support for unary minus and bitwise NOT operators

These unary operators are not covered by the OperatorTypeSpecifyingExtension
interface (which handles binary operators only), so they need direct handling
in InitializerExprTypeResolver.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Firehed

src/Reflection/InitializerExprTypeResolver.php

@@ -2611,6 +2611,11 @@ public function getUnaryMinusType(Expr $expr, callable $getTypeCallback): Type
 	{
 		$type = $getTypeCallback($expr);
 
+		// GMP supports unary minus and returns GMP
+		if ($type->isObject()->yes() && (new ObjectType('GMP'))->isSuperTypeOf($type)->yes()) {
+			return new ObjectType('GMP');
+		}
+
 		$type = $this->getUnaryMinusTypeFromType($expr, $type);
 		if ($type instanceof IntegerRangeType) {
 			return $getTypeCallback(new Expr\BinaryOp\Mul($expr, new Int_(-1)));
@@ -2652,6 +2657,11 @@ public function getBitwiseNotType(Expr $expr, callable $getTypeCallback): Type
 	{
 		$exprType = $getTypeCallback($expr);
 
+		// GMP supports bitwise not and returns GMP
+		if ($exprType->isObject()->yes() && (new ObjectType('GMP'))->isSuperTypeOf($exprType)->yes()) {
+			return new ObjectType('GMP');
+		}
+
 		return $this->getBitwiseNotTypeFromType($exprType);
 	}