Compute constant constructors in resolution.

pkg/compiler/lib/src/constants/expressions.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 dart2js.constants.expressions;
 
 import '../constants/constant_system.dart';
 import '../core_types.dart';
 import '../dart2jslib.dart' show assertDebugMode, Compiler;
 import '../dart_types.dart';
 import '../elements/elements.dart' show
     ConstructorElement,
     Element,
     FieldElement,
     FunctionElement,
     PrefixElement,
     VariableElement;
 import '../resolution/operators.dart';
 import '../tree/tree.dart' show DartString;
 import '../universe/universe.dart' show CallStructure;
+import '../util/util.dart';
 import 'values.dart';
 
 enum ConstantExpressionKind {
   BINARY,
   BOOL,
   BOOL_FROM_ENVIRONMENT,
   CONCATENATE,
   CONDITIONAL,
   CONSTRUCTED,
   DEFERRED,
@@ skipping 103 matching lines @@
     NormalizedArguments args = new NormalizedArguments(
         defaultValues, callStructure, arguments);
     Map<FieldElement, ConstantExpression> appliedFieldMap =
         applyFields(args, superConstructorInvocation);
     fieldMap.forEach((FieldElement field, ConstantExpression constant) {
      appliedFieldMap[field] = constant.apply(args);
     });
     return appliedFieldMap;
   }
 
+  int get hashCode {
+    int hash = Hashing.objectHash(type);
+    hash = Hashing.mapHash(defaultValues, hash);
+    hash = Hashing.mapHash(fieldMap, hash);
+    return Hashing.objectHash(superConstructorInvocation, hash);
+  }
+
+  bool operator ==(other) {
+    if (identical(this, other)) return true;
+    if (other is! GenerativeConstantConstructor) return false;
+    return
+        type == other.type &&
+        superConstructorInvocation == other.superConstructorInvocation &&
+        mapEquals(defaultValues, other.defaultValues) &&
+        mapEquals(fieldMap, other.fieldMap);
+  }
+
   String toString() {
     StringBuffer sb = new StringBuffer();
     sb.write("{'type': $type");
     defaultValues.forEach((key, ConstantExpression expression) {
       sb.write(",\n 'default:${key}': ${expression.getText()}");
     });
     fieldMap.forEach((FieldElement field, ConstantExpression expression) {
       sb.write(",\n 'field:${field}': ${expression.getText()}");
     });
     if (superConstructorInvocation != null) {
       sb.write(",\n 'constructor: ${superConstructorInvocation.getText()}");
     }
     sb.write("}");
     return sb.toString();
   }
 
+  static bool mapEquals(Map map1, Map map2) {
+    if (map1.length != map1.length) return false;
+    for (var key in map1.keys) {
+      if (map1[key] != map2[key]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   /// Creates the field-to-constant map from applying [args] to
   /// [constructorInvocation]. If [constructorInvocation] is `null`, an empty
   /// map is created.
   static Map<FieldElement, ConstantExpression> applyFields(
       NormalizedArguments args,
       ConstructedConstantExpression constructorInvocation) {
     Map<FieldElement, ConstantExpression> appliedFieldMap =
         <FieldElement, ConstantExpression>{};
     if (constructorInvocation != null) {
       Map<FieldElement, ConstantExpression> fieldMap =
@@ skipping 28 matching lines @@
       List<ConstantExpression> arguments,
       CallStructure callStructure) {
     NormalizedArguments args =
         new NormalizedArguments(defaultValues, callStructure, arguments);
     Map<FieldElement, ConstantExpression> appliedFieldMap =
         GenerativeConstantConstructor.applyFields(
             args, thisConstructorInvocation);
     return appliedFieldMap;
   }
 
+  int get hashCode {
+    int hash = Hashing.objectHash(thisConstructorInvocation);
+    return Hashing.mapHash(defaultValues, hash);
+  }
+
+  bool operator ==(other) {
+    if (identical(this, other)) return true;
+    if (other is! RedirectingGenerativeConstantConstructor) return false;
+    return
+        thisConstructorInvocation == other.thisConstructorInvocation &&
+        GenerativeConstantConstructor.mapEquals(
+            defaultValues, other.defaultValues);
+  }
+
   String toString() {
     StringBuffer sb = new StringBuffer();
     sb.write("{'type': ${thisConstructorInvocation.type}");
     defaultValues.forEach((key, ConstantExpression expression) {
       sb.write(",\n 'default:${key}': ${expression.getText()}");
     });
     sb.write(",\n 'constructor': ${thisConstructorInvocation.getText()}");
     sb.write("}");
     return sb.toString();
   }
@@ skipping 15 matching lines @@
   }
 
   Map<FieldElement, ConstantExpression> computeInstanceFields(
       List<ConstantExpression> arguments,
       CallStructure callStructure) {
     ConstantConstructor constantConstructor =
         targetConstructorInvocation.target.constantConstructor;
     return constantConstructor.computeInstanceFields(arguments, callStructure);
   }
 
+  int get hashCode {
+    return Hashing.objectHash(targetConstructorInvocation);
+  }
+
+  bool operator ==(other) {
+    if (identical(this, other)) return true;
+    if (other is! RedirectingFactoryConstantConstructor) return false;
+    return targetConstructorInvocation == other.targetConstructorInvocation;
+  }
+
   String toString() {
     StringBuffer sb = new StringBuffer();
     sb.write("{");
     sb.write("'constructor': ${targetConstructorInvocation.getText()}");
     sb.write("}");
     return sb.toString();
   }
 }
 
 /// An expression that is a compile-time constant.
@@ skipping 1542 matching lines @@
     visit(exp.name);
     if (exp.defaultValue != null) {
       sb.write(', defaultValue: ');
       visit(exp.defaultValue);
     }
     sb.write(')');
   }
 
   String toString() => sb.toString();
 }