minor symfony#57762 [Validator] Use CPP in ConstraintViolation (alexandre-daubois)

This PR was merged into the 7.2 branch.

Discussion
----------

[Validator] Use CPP in `ConstraintViolation`

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Following the multiple PRs converting constructors across the codebase.

Commits
-------

5856294 [Validator] Use CPP in `ConstraintViolation`

Author: nicolas-grekas

src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php

@@ -314,12 +314,12 @@ public function testExtractSubmittedDataStoresErrorCause()
           -message: "Foo"
           -messageTemplate: "Foo"
           -parameters: []
-          -plural: null
           -root: "Root"
           -propertyPath: "property.path"
           -invalidValue: "Invalid!"
-          -constraint: null
+          -plural: null
           -code: null
+          -constraint: null
           -cause: Exception {%A}
         }
         1 => Exception {#1}

src/Symfony/Component/Validator/ConstraintViolation.php

@@ -18,17 +18,6 @@
  */
 class ConstraintViolation implements ConstraintViolationInterface
 {
-    private string|\Stringable $message;
-    private ?string $messageTemplate;
-    private array $parameters;
-    private ?int $plural;
-    private mixed $root;
-    private ?string $propertyPath;
-    private mixed $invalidValue;
-    private ?Constraint $constraint;
-    private ?string $code;
-    private mixed $cause;
-
     /**
      * Creates a new constraint violation.
      *
@@ -49,18 +38,18 @@ class ConstraintViolation implements ConstraintViolationInterface
      *                                            caused the violation
      * @param mixed              $cause           The cause of the violation
      */
-    public function __construct(string|\Stringable $message, ?string $messageTemplate, array $parameters, mixed $root, ?string $propertyPath, mixed $invalidValue, ?int $plural = null, ?string $code = null, ?Constraint $constraint = null, mixed $cause = null)
-    {
-        $this->message = $message;
-        $this->messageTemplate = $messageTemplate;
-        $this->parameters = $parameters;
-        $this->plural = $plural;
-        $this->root = $root;
-        $this->propertyPath = $propertyPath;
-        $this->invalidValue = $invalidValue;
-        $this->constraint = $constraint;
-        $this->code = $code;
-        $this->cause = $cause;
+    public function __construct(
+        private string|\Stringable $message,
+        private ?string $messageTemplate,
+        private array $parameters,
+        private mixed $root,
+        private ?string $propertyPath,
+        private mixed $invalidValue,
+        private ?int $plural = null,
+        private ?string $code = null,
+        private ?Constraint $constraint = null,
+        private mixed $cause = null,
+    ) {
     }
 
     public function __toString(): string