Implement the new '?.' operator in analyzer.

pkg/analyzer/test/generated/parser_test.dart

 // Copyright (c) 2014, 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.
 
 library engine.parser_test;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
@@ skipping 1284 matching lines @@
 
   void test_invalidInterpolationIdentifier_startWithDigit() {
     parse4("parseStringLiteral", "'\$1'", [ParserErrorCode.MISSING_IDENTIFIER]);
   }
 
   void test_invalidOperator() {
     parse3("parseClassMember", <Object>["C"], "void operator ===(x) {}",
         [ParserErrorCode.INVALID_OPERATOR]);
   }
 
+  void test_invalidOperatorAfterSuper_assignableExpression() {
+    _enableNullAwareOperators = true;
+    parse3('parseAssignableExpression', <Object>[false], 'super?.v',
+        [ParserErrorCode.INVALID_OPERATOR_FOR_SUPER]);
+  }
+
+  void test_invalidOperatorAfterSuper_primaryExpression() {
+    _enableNullAwareOperators = true;
+    parse4('parsePrimaryExpression', 'super?.v',
+        [ParserErrorCode.INVALID_OPERATOR_FOR_SUPER]);
+  }
+
   void test_invalidOperatorForSuper() {
     parse4("parseUnaryExpression", "++super",
         [ParserErrorCode.INVALID_OPERATOR_FOR_SUPER]);
   }
 
   void test_invalidStarAfterAsync() {
     parse3("parseFunctionBody", <Object>[
       false,
       null,
       false
@@ skipping 8820 matching lines @@
         new Scanner(null, new CharSequenceReader(source), listener);
     Token tokenStream = scanner.tokenize();
     //
     // Parse the source.
     //
     Parser parser = new Parser(null, listener);
     return invokeParserMethodImpl(
         parser, methodName, <Object>[tokenStream], tokenStream) as Token;
   }
 }