Syntactic support for type aliases

src/main/php/lang/ast/syntax/PHP.class.php

@@ -603,6 +603,10 @@ public function __construct() {
           $names[$import]= $parse->token->value;
           $parse->scope->import($import, $parse->token->value);
           $parse->forward();
+        } else if ('=' === $parse->token->value) {
+          $parse->forward();
+          $type= 'type';
+          $names[$import]= $this->type($parse, false);
         } else {
           $names[$import]= null;
           $parse->scope->import($import);

src/test/php/lang/ast/unittest/parse/NamespacesTest.class.php

@@ -1,6 +1,7 @@
 <?php namespace lang\ast\unittest\parse;
 
 use lang\ast\nodes\{NamespaceDeclaration, UseStatement};
+use lang\ast\types\{IsLiteral, IsUnion};
 use test\{Assert, Test};
 
 class NamespacesTest extends ParseTest {
@@ -100,4 +101,12 @@ public function use_const() {
       'use const MODIFIER_STATIC;'
     );
   }
+
+  #[Test]
+  public function use_type() {
+    $this->assertParsed(
+      [new UseStatement('type', ['Name' => new IsUnion([new IsLiteral('string'), new IsLiteral('null')])], self::LINE)],
+      'use Name = string|null;'
+    );
+  }
 }