Add support for metadata annotation syntax (issue 4056)

compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 package com.google.dart.compiler.parser;
 
 import com.google.common.base.Joiner;
 import com.google.dart.compiler.DartCompilerListener;
 import com.google.dart.compiler.DartSourceTest;
 import com.google.dart.compiler.ast.DartArrayLiteral;
 import com.google.dart.compiler.ast.DartBinaryExpression;
 import com.google.dart.compiler.ast.DartClass;
 import com.google.dart.compiler.ast.DartComment;
 import com.google.dart.compiler.ast.DartExprStmt;
 import com.google.dart.compiler.ast.DartExpression;
 import com.google.dart.compiler.ast.DartField;
 import com.google.dart.compiler.ast.DartFieldDefinition;
 import com.google.dart.compiler.ast.DartFunctionExpression;
 import com.google.dart.compiler.ast.DartIdentifier;
 import com.google.dart.compiler.ast.DartIntegerLiteral;
 import com.google.dart.compiler.ast.DartMapLiteral;
+import com.google.dart.compiler.ast.DartAnnotation;
 import com.google.dart.compiler.ast.DartMethodDefinition;
 import com.google.dart.compiler.ast.DartNode;
 import com.google.dart.compiler.ast.DartPropertyAccess;
 import com.google.dart.compiler.ast.DartStatement;
 import com.google.dart.compiler.ast.DartStringInterpolation;
 import com.google.dart.compiler.ast.DartStringLiteral;
 import com.google.dart.compiler.ast.DartTryStatement;
 import com.google.dart.compiler.ast.DartTypeExpression;
 import com.google.dart.compiler.ast.DartTypeNode;
 import com.google.dart.compiler.ast.DartUnaryExpression;
@@ skipping 889 matching lines @@
         "main() {",
         "  const v = 1;",
         "}"));
     assertNotNull(unit);
     DartNode firstNode = unit.getTopLevelNodes().get(0);
     assertTrue(firstNode instanceof DartMethodDefinition);
     DartStatement statement = ((DartMethodDefinition) firstNode).getFunction().getBody().getStatements().get(0);
     assertTrue(((DartVariableStatement) statement).getModifiers().isConstant());
   }
 
+  public void test_metadata_identifier() {
+    String code = makeCode(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "const int annotation = 0;",
+        "class A {",
+        "  m0() {}",
+        "  @annotation",
+        "  m1() {}",
+        "}",
+        "");
+    DartUnit unit = parseUnit(getName() + ".dart", code);
+    DartClass classA = (DartClass) unit.getTopLevelNodes().get(1);
+
+    DartMethodDefinition method0 = (DartMethodDefinition) classA.getMembers().get(0);
+    assertEquals("m0", method0.getName().toSource());
+    assertEquals(0, method0.getMetadata().size());
+
+    DartMethodDefinition method1 = (DartMethodDefinition) classA.getMembers().get(1);
+    assertEquals("m1", method1.getName().toSource());
+    assertEquals(1, method1.getMetadata().size());
+    DartAnnotation metadata = method1.getMetadata().get(0);
+    assertNotNull(metadata);
+    DartExpression name = metadata.getName();
+    assertTrue(name instanceof DartIdentifier);
+    assertEquals("annotation", name.toSource());
+    assertEquals(0, metadata.getArguments().size());
+  }
+
+  public void test_metadata_constructor() {
+    String code = makeCode(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "class A {",
+        "  const A();",
+        "}",
+        "",
+        "class B {",
+        "  m0() {}",
+        "  @A()",
+        "  m1() {}",
+        "}",
+        "");
+    DartUnit unit = parseUnit(getName() + ".dart", code);
+    DartClass classB = (DartClass) unit.getTopLevelNodes().get(1);
+
+    DartMethodDefinition method0 = (DartMethodDefinition) classB.getMembers().get(0);
+    assertEquals("m0", method0.getName().toSource());
+    assertEquals(0, method0.getMetadata().size());
+
+    DartMethodDefinition method1 = (DartMethodDefinition) classB.getMembers().get(1);
+    assertEquals("m1", method1.getName().toSource());
+    assertEquals(1, method1.getMetadata().size());
+  }
+
   public void test_metadata_deprecated() {
     String code = makeCode(
         "// filler filler filler filler filler filler filler filler filler filler",
         "class A {",
         "  m0() {}",
         "  // @deprecated",
         "  m1() {}",
         "}",
         "");
     DartUnit unit = parseUnit(getName() + ".dart", code);
     // A
     {
       DartClass classA = (DartClass) unit.getTopLevelNodes().get(0);
       // m0()
       {
         DartMethodDefinition method = (DartMethodDefinition) classA.getMembers().get(0);
         assertEquals("m0", method.getName().toSource());
-        assertEquals(false, method.getMetadata().isDeprecated());
+        assertEquals(false, method.getObsoleteMetadata().isDeprecated());
       }
       // m1()
       {
         DartMethodDefinition method = (DartMethodDefinition) classA.getMembers().get(1);
         assertEquals("m1", method.getName().toSource());
-        assertEquals(true, method.getMetadata().isDeprecated());
+        assertEquals(true, method.getObsoleteMetadata().isDeprecated());
       }
     }
   }
 
   public void test_metadata_override() {
     String code = makeCode(
         "// filler filler filler filler filler filler filler filler filler filler",
         "class A {",
         "  m0() {}",
         "  // @override",
         "  m1() {}",
         "  /** Leading DartDoc comment */",
         "  // @override",
         "  m2() {}",
         "  /**",
         "   * DartDoc comment",
         "   * @override",
         "   */",
         "  m3() {}",
         "}",
         "");
     DartUnit unit = parseUnit(getName() + ".dart", code);
     // A
     {
       DartClass classA = (DartClass) unit.getTopLevelNodes().get(0);
       // m0()
       {
         DartMethodDefinition method = (DartMethodDefinition) classA.getMembers().get(0);
         assertEquals("m0", method.getName().toSource());
-        assertEquals(false, method.getMetadata().isOverride());
+        assertEquals(false, method.getObsoleteMetadata().isOverride());
         assertNull(method.getDartDoc());
       }
       // m1()
       {
         DartMethodDefinition method = (DartMethodDefinition) classA.getMembers().get(1);
         assertEquals("m1", method.getName().toSource());
-        assertEquals(true, method.getMetadata().isOverride());
+        assertEquals(true, method.getObsoleteMetadata().isOverride());
         assertNull(method.getDartDoc());
       }
       // m2()
       {
         DartMethodDefinition method = (DartMethodDefinition) classA.getMembers().get(2);
         assertEquals("m2", method.getName().toSource());
-        assertEquals(true, method.getMetadata().isOverride());
+        assertEquals(true, method.getObsoleteMetadata().isOverride());
         {
           DartComment dartDoc = method.getDartDoc();
           assertNotNull(dartDoc);
           assertEquals("/** Leading DartDoc comment */", getNodeSource(code, dartDoc));
         }
       }
       // m3()
       {
         DartMethodDefinition method = (DartMethodDefinition) classA.getMembers().get(3);
         assertEquals("m3", method.getName().toSource());
-        assertEquals(true, method.getMetadata().isOverride());
+        assertEquals(true, method.getObsoleteMetadata().isOverride());
         {
           DartComment dartDoc = method.getDartDoc();
           assertNotNull(dartDoc);
           String commentCode = getNodeSource(code, dartDoc);
           assertTrue(commentCode.contains("DartDoc comment"));
           assertTrue(commentCode.contains("@override"));
         }
       }
     }
   }
@@ skipping 227 matching lines @@
             "typedef func(var arg());",
             ParserErrorCode.FUNCTION_TYPED_PARAMETER_IS_VAR, 1, 18);
   }
 
   public void test_finalInFunctionType() throws Exception {
     parseUnit("phony_var_in_function_type.dart",
             "typedef func(final arg());",
             ParserErrorCode.FUNCTION_TYPED_PARAMETER_IS_FINAL, 1, 20);
   }
 }