implement tear offs

lib/src/utils.dart

 // Copyright (c) 2015, 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.
 
 /// Holds a couple utility functions used at various places in the system.
 library dev_compiler.src.utils;
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:analyzer/src/generated/ast.dart'
     show
         ImportDirective,
         ExportDirective,
         PartDirective,
         CompilationUnit,
         Identifier,
         AnnotatedNode,
         AstNode,
         Expression,
-        SimpleIdentifier;
+        SimpleIdentifier,
+        MethodInvocation;
 import 'package:analyzer/src/generated/constant.dart' show DartObjectImpl;
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show ParseDartTask, AnalysisContext;
 import 'package:analyzer/src/generated/resolver.dart' show TypeProvider;
 import 'package:analyzer/src/generated/source.dart' show Source;
 import 'package:analyzer/analyzer.dart' show parseDirectives;
 import 'package:crypto/crypto.dart' show CryptoUtils, MD5;
 import 'package:source_span/source_span.dart';
 import 'package:yaml/yaml.dart';
@@ skipping 349 matching lines @@
 /// If the field is missing or is not [expectedType], returns null.
 Object getConstantField(
     DartObjectImpl value, String fieldName, DartType expectedType) {
   if (value == null) return null;
   var f = value.fields[fieldName];
   return (f == null || f.type != expectedType) ? null : f.value;
 }
 
 InterfaceType fillDynamicTypeArgs(InterfaceType t, TypeProvider types) =>
     t.substitute4(new List.filled(t.typeArguments.length, types.dynamicType));
+
+/// Similar to [SimpleIdentifier] inGetterContext, inSetterContext, and
+/// inDeclarationContext, this method returns true if [node] is used in an
+/// invocation context such as a MethodInvocation.
+bool inInvocationContext(SimpleIdentifier node) {
+  var parent = node.parent;
+  return parent is MethodInvocation && parent.methodName == node;
+}