Implement Shorter Attribute Syntax

UPGRADING

@@ -78,6 +78,10 @@ PHP 8.0 UPGRADE NOTES
     Additionally, care should be taken that error messages are not displayed in
     production environments, which can result in information leaks. Please
     ensure that display_errors=Off is used in conjunction with error logging.
+  . Adding more than one @ operator to an expression is no longer supported,
+    since this syntax is now used for attributes (previously extra @ operators
+    had no effect).
+    RFC: https://wiki.php.net/rfc/shorter_attribute_syntax
   . Inheritance errors due to incompatible method signatures (LSP violations)
     will now always generate a fatal error. Previously a warning was generated
     in some cases.
@@ -605,6 +609,7 @@ PHP 8.0 UPGRADE NOTES
   . Added support for Attributes
     RFC: https://wiki.php.net/rfc/attributes_v2
     RFC: https://wiki.php.net/rfc/attribute_amendments
+    RFC: https://wiki.php.net/rfc/shorter_attribute_syntax
   . Added support for constructor property promotion (declaring properties in
     the constructor signature).
     RFC: https://wiki.php.net/rfc/constructor_promotion

Zend/tests/attributes/001_placement.phpt

@@ -3,27 +3,27 @@ Attributes can be placed on all supported elements.
 --FILE--
 <?php
 
-<<A1(1)>>
+@@A1(1)
 class Foo
 {
-    <<A1(2)>>
+    @@A1(2)
     public const FOO = 'foo';
 
-    <<A1(3)>>
+    @@A1(3)
     public $x;
 
-    <<A1(4)>>
-    public function foo(<<A1(5)>> $a, <<A1(6)>> $b) { }
+    @@A1(4)
+    public function foo(@@A1(5) $a, @@A1(6) $b) { }
 }
 
-$object = new <<A1(7)>> class () { };
+$object = new @@A1(7) class () { };
 
-<<A1(8)>>
+@@A1(8)
 function f1() { }
 
-$f2 = <<A1(9)>> function () { };
+$f2 = @@A1(9) function () { };
 
-$f3 = <<A1(10)>> fn () => 1;
+$f3 = @@A1(10) fn () => 1;
 
 $ref = new \ReflectionClass(Foo::class);
 

Zend/tests/attributes/002_rfcexample.phpt

@@ -6,7 +6,7 @@ Attributes: Example from Attributes RFC
 namespace My\Attributes {
     use Attribute;
 
-    <<Attribute>>
+    @@Attribute
     class SingleArgument {
         public $argumentValue;
 
@@ -19,7 +19,7 @@ namespace My\Attributes {
 namespace {
     use My\Attributes\SingleArgument;
 
-    <<SingleArgument("Hello World")>>
+    @@SingleArgument("Hello World")
     class Foo {
     }
 

Zend/tests/attributes/003_ast_nodes.phpt

@@ -5,7 +5,7 @@ Attributes can deal with AST nodes.
 
 define('V1', strtoupper(php_sapi_name()));
 
-<<A1([V1 => V1])>>
+@@A1([V1 => V1])
 class C1
 {
 	public const BAR = 'bar';
@@ -20,7 +20,7 @@ var_dump(count($args), $args[0][V1] === V1);
 
 echo "\n";
 
-<<A1(V1, 1 + 2, C1::class)>>
+@@A1(V1, 1 + 2, C1::class)
 class C2 { }
 
 $ref = new \ReflectionClass(C2::class);
@@ -35,7 +35,7 @@ var_dump($args[2] === C1::class);
 
 echo "\n";
 
-<<A1(self::FOO, C1::BAR)>>
+@@A1(self::FOO, C1::BAR)
 class C3
 {
 	private const FOO = 'foo';
@@ -52,20 +52,20 @@ var_dump($args[1] === C1::BAR);
 
 echo "\n";
 
-<<ExampleWithShift(4 >> 1)>>
+@@ExampleWithShift(4 >> 1)
 class C4 {}
 $ref = new \ReflectionClass(C4::class);
 var_dump($ref->getAttributes()[0]->getArguments());
 
 echo "\n";
 
-<<Attribute>>
+@@Attribute
 class C5
 {
 	public function __construct() { }
 }
 
-$ref = new \ReflectionFunction(<<C5(MissingClass::SOME_CONST)>> function () { });
+$ref = new \ReflectionFunction(@@C5(MissingClass::SOME_CONST) function () { });
 $attr = $ref->getAttributes();
 var_dump(count($attr));
 

Zend/tests/attributes/004_name_resolution.phpt

@@ -25,11 +25,11 @@ namespace Foo {
     use Doctrine\ORM\Mapping as ORM;
     use Doctrine\ORM\Attributes;
 
-    <<Entity("imported class")>>
-    <<ORM\Entity("imported namespace")>>
-    <<\Doctrine\ORM\Mapping\Entity("absolute from namespace")>>
-    <<\Entity("import absolute from global")>>
-    <<Attributes\Table()>>
+    @@Entity("imported class")
+    @@ORM\Entity("imported namespace")
+    @@\Doctrine\ORM\Mapping\Entity("absolute from namespace")
+    @@\Entity("import absolute from global")
+    @@Attributes\Table()
     function foo() {
     }
 }

Zend/tests/attributes/005_objects.phpt

@@ -3,7 +3,7 @@ Attributes can be converted into objects.
 --FILE--
 <?php
 
-<<Attribute(Attribute::TARGET_FUNCTION)>>
+@@Attribute(Attribute::TARGET_FUNCTION)
 class A1
 {
 	public string $name;
@@ -16,7 +16,7 @@ class A1
 	}
 }
 
-$ref = new \ReflectionFunction(<<A1('test')>> function () { });
+$ref = new \ReflectionFunction(@@A1('test') function () { });
 
 foreach ($ref->getAttributes() as $attr) {
 	$obj = $attr->newInstance();
@@ -26,7 +26,7 @@ foreach ($ref->getAttributes() as $attr) {
 
 echo "\n";
 
-$ref = new \ReflectionFunction(<<A1>> function () { });
+$ref = new \ReflectionFunction(@@A1 function () { });
 
 try {
 	$ref->getAttributes()[0]->newInstance();
@@ -36,7 +36,7 @@ try {
 
 echo "\n";
 
-$ref = new \ReflectionFunction(<<A1([])>> function () { });
+$ref = new \ReflectionFunction(@@A1([]) function () { });
 
 try {
 	$ref->getAttributes()[0]->newInstance();
@@ -46,7 +46,7 @@ try {
 
 echo "\n";
 
-$ref = new \ReflectionFunction(<<A2>> function () { });
+$ref = new \ReflectionFunction(@@A2 function () { });
 
 try {
 	$ref->getAttributes()[0]->newInstance();
@@ -56,13 +56,13 @@ try {
 
 echo "\n";
 
-<<Attribute>>
+@@Attribute
 class A3
 {
 	private function __construct() { }
 }
 
-$ref = new \ReflectionFunction(<<A3>> function () { });
+$ref = new \ReflectionFunction(@@A3 function () { });
 
 try {
 	$ref->getAttributes()[0]->newInstance();
@@ -72,10 +72,10 @@ try {
 
 echo "\n";
 
-<<Attribute>>
+@@Attribute
 class A4 { }
 
-$ref = new \ReflectionFunction(<<A4(1)>> function () { });
+$ref = new \ReflectionFunction(@@A4(1) function () { });
 
 try {
 	$ref->getAttributes()[0]->newInstance();
@@ -87,7 +87,7 @@ echo "\n";
 
 class A5 { }
 
-$ref = new \ReflectionFunction(<<A5>> function () { });
+$ref = new \ReflectionFunction(@@A5 function () { });
 
 try {
 	$ref->getAttributes()[0]->newInstance();

Zend/tests/attributes/006_filter.phpt

@@ -3,17 +3,17 @@ Attributes can be filtered by name and base type.
 --FILE--
 <?php
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 function () { });
 $attr = $ref->getAttributes(A3::class);
 
 var_dump(count($attr));
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 function () { });
 $attr = $ref->getAttributes(A2::class);
 
 var_dump(count($attr), $attr[0]->getName());
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> <<A2>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 @@A2 function () { });
 $attr = $ref->getAttributes(A2::class);
 
 var_dump(count($attr), $attr[0]->getName(), $attr[1]->getName());
@@ -25,27 +25,27 @@ class A1 implements Base { }
 class A2 implements Base { }
 class A3 extends A2 { }
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> <<A5>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 @@A5 function () { });
 $attr = $ref->getAttributes(\stdClass::class, \ReflectionAttribute::IS_INSTANCEOF);
 var_dump(count($attr));
 print_r(array_map(fn ($a) => $a->getName(), $attr));
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 function () { });
 $attr = $ref->getAttributes(A1::class, \ReflectionAttribute::IS_INSTANCEOF);
 var_dump(count($attr));
 print_r(array_map(fn ($a) => $a->getName(), $attr));
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 function () { });
 $attr = $ref->getAttributes(Base::class, \ReflectionAttribute::IS_INSTANCEOF);
 var_dump(count($attr));
 print_r(array_map(fn ($a) => $a->getName(), $attr));
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> <<A3>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 @@A3 function () { });
 $attr = $ref->getAttributes(A2::class, \ReflectionAttribute::IS_INSTANCEOF);
 var_dump(count($attr));
 print_r(array_map(fn ($a) => $a->getName(), $attr));
 
-$ref = new \ReflectionFunction(<<A1>> <<A2>> <<A3>> function () { });
+$ref = new \ReflectionFunction(@@A1 @@A2 @@A3 function () { });
 $attr = $ref->getAttributes(Base::class, \ReflectionAttribute::IS_INSTANCEOF);
 var_dump(count($attr));
 print_r(array_map(fn ($a) => $a->getName(), $attr));

Zend/tests/attributes/008_wrong_attribution.phpt

@@ -3,7 +3,7 @@ Attributes: Prevent Attribute on non classes
 --FILE--
 <?php
 
-<<Attribute>>
+@@Attribute
 function foo() {}
 --EXPECTF--
 Fatal error: Attribute "Attribute" cannot target function (allowed targets: class) in %s

Zend/tests/attributes/009_doctrine_annotations_example.phpt

@@ -25,20 +25,22 @@ namespace {
 use Doctrine\ORM\Attributes as ORM;
 use Symfony\Component\Validator\Constraints as Assert;
 
-<<ORM\Entity>>
+@@ORM\Entity
 /** @ORM\Entity */
 class User
 {
     /** @ORM\Id @ORM\Column(type="integer"*) @ORM\GeneratedValue */
-    <<ORM\Id>><<ORM\Column("integer")>><<ORM\GeneratedValue>>
+    @@ORM\Id
+    @@ORM\Column("integer")
+    @@ORM\GeneratedValue
     private $id;
 
     /**
      * @ORM\Column(type="string", unique=true)
      * @Assert\Email(message="The email '{{ value }}' is not a valid email.")
      */
-    <<ORM\Column("string", ORM\Column::UNIQUE)>>
-    <<Assert\Email(array("message" => "The email '{{ value }}' is not a valid email."))>>
+    @@ORM\Column("string", ORM\Column::UNIQUE)
+    @@Assert\Email(array("message" => "The email '{{ value }}' is not a valid email."))
     private $email;
 
     /**
@@ -50,8 +52,8 @@ class User
      *      maxMessage = "You cannot be taller than {{ limit }}cm to enter"
      * )
      */
-    <<Assert\Range(["min" => 120, "max" => 180, "minMessage" => "You must be at least {{ limit }}cm tall to enter"])>>
-    <<ORM\Column(ORM\Column::T_INTEGER)>>
+    @@Assert\Range(["min" => 120, "max" => 180, "minMessage" => "You must be at least {{ limit }}cm tall to enter"])
+    @@ORM\Column(ORM\Column::T_INTEGER)
     protected $height;
 
     /**
@@ -61,10 +63,10 @@ class User
      *      inverseJoinColumns={@ORM\JoinColumn(name="phonenumber_id", referencedColumnName="id", unique=true)}
      *      )
      */
-    <<ORM\ManyToMany(Phonenumber::class)>>
-    <<ORM\JoinTable("users_phonenumbers")>>
-    <<ORM\JoinColumn("user_id", "id")>>
-    <<ORM\InverseJoinColumn("phonenumber_id", "id", ORM\JoinColumn::UNIQUE)>>
+    @@ORM\ManyToMany(Phonenumber::class)
+    @@ORM\JoinTable("users_phonenumbers")
+    @@ORM\JoinColumn("user_id", "id")
+    @@ORM\InverseJoinColumn("phonenumber_id", "id", ORM\JoinColumn::UNIQUE)
     private $phonenumbers;
 }
 

Zend/tests/attributes/010_unsupported_const_expression.phpt

@@ -3,7 +3,7 @@ Attribute arguments support only const expressions.
 --FILE--
 <?php
 
-<<A1(foo())>>
+@@A1(foo())
 class C1 { }
 
 ?>

Zend/tests/attributes/011_inheritance.phpt

@@ -3,10 +3,10 @@ Attributes comply with inheritance rules.
 --FILE--
 <?php
 
-<<A2>>
+@@A2
 class C1
 {
-	<<A1>>
+	@@A1
 	public function foo() { }
 }
 
@@ -17,7 +17,7 @@ class C2 extends C1
 
 class C3 extends C1
 {
-	<<A1>>
+	@@A1
 	public function bar() { }
 }
 
@@ -37,7 +37,7 @@ echo "\n";
 
 trait T1
 {
-	<<A2>>
+	@@A2
 	public $a;
 }