Split implementation of KernelToElementMapImpl

pkg/compiler/lib/src/kernel/elements.dart

Index: pkg/compiler/lib/src/kernel/elements.dart
diff --git a/pkg/compiler/lib/src/kernel/elements.dart b/pkg/compiler/lib/src/kernel/elements.dart
index e90b58c1d85e55a08f5ba735d5c5dca7dbf9ee2d..056f09f3403b4920a77dd1d0c4019491f0a55ee7 100644
--- a/pkg/compiler/lib/src/kernel/elements.dart
+++ b/pkg/compiler/lib/src/kernel/elements.dart
@@ -2,246 +2,28 @@
 // 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.
 
-/// Entity model for elements derived from Kernel IR.
+/// Entity interfaces for modeling elements derived from Kernel IR.
 
 import '../elements/entities.dart';
-import '../elements/names.dart';
-import '../elements/types.dart';
 
-class KLibrary implements LibraryEntity {
-  /// Library index used for fast lookup in [KernelWorldBuilder].
-  final int libraryIndex;
-  final String name;
-  final Uri canonicalUri;
-
-  KLibrary(this.libraryIndex, this.name, this.canonicalUri);
-
-  String toString() => 'library($name)';
-}
-
-class KClass implements ClassEntity {
-  final KLibrary library;
-
-  /// Class index used for fast lookup in [KernelWorldBuilder].
-  final int classIndex;
-
-  final String name;
-  final bool isAbstract;
-
-  KClass(this.library, this.classIndex, this.name, {this.isAbstract});
-
-  @override
-  bool get isClosure => false;
-
-  String toString() => 'class($name)';
-}
-
-abstract class KMember implements MemberEntity {
-  /// Member index used for fast lookup in [KernelWorldBuilder].
-  final int memberIndex;
-  final KLibrary library;
-  final KClass enclosingClass;
-  final Name _name;
-  final bool _isStatic;
-
-  KMember(this.memberIndex, this.library, this.enclosingClass, this._name,
-      {bool isStatic: false})
-      : _isStatic = isStatic;
-
-  String get name => _name.text;
-
-  Name get memberName => _name;
-
-  @override
-  bool get isAssignable => false;
-
-  @override
-  bool get isConst => false;
-
-  @override
-  bool get isAbstract => false;
-
-  @override
-  bool get isSetter => false;
-
-  @override
-  bool get isGetter => false;
-
-  @override
-  bool get isFunction => false;
-
-  @override
-  bool get isField => false;
-
-  @override
-  bool get isConstructor => false;
-
-  @override
-  bool get isInstanceMember => enclosingClass != null && !_isStatic;
-
-  @override
-  bool get isStatic => enclosingClass != null && _isStatic;
-
-  @override
-  bool get isTopLevel => enclosingClass == null;
-
-  String get _kind;
-
-  String toString() =>
-      '$_kind(${enclosingClass != null ? '${enclosingClass.name}.' : ''}$name)';
-}
-
-abstract class KFunction extends KMember implements FunctionEntity {
-  final ParameterStructure parameterStructure;
-  final bool isExternal;
-  final AsyncMarker asyncMarker;
-
-  KFunction(int memberIndex, KLibrary library, KClass enclosingClass, Name name,
-      this.parameterStructure, this.asyncMarker,
-      {bool isStatic: false, this.isExternal: false})
-      : super(memberIndex, library, enclosingClass, name, isStatic: isStatic);
-}
-
-abstract class KConstructor extends KFunction implements ConstructorEntity {
-  final bool isConst;
-
-  KConstructor(int memberIndex, KClass enclosingClass, Name name,
-      ParameterStructure parameterStructure, {bool isExternal, this.isConst})
-      : super(memberIndex, enclosingClass.library, enclosingClass, name,
-            parameterStructure, AsyncMarker.SYNC,
-            isExternal: isExternal);
-
-  @override
-  bool get isConstructor => true;
-
-  @override
-  bool get isInstanceMember => false;
-
-  @override
-  bool get isStatic => false;
-
-  @override
-  bool get isTopLevel => false;
-
-  @override
-  bool get isFromEnvironmentConstructor => false;
-
-  String get _kind => 'constructor';
+abstract class IndexedLibrary implements LibraryEntity {
+  /// Library index used for fast lookup in [KernelToElementMapBase].
+  int get libraryIndex;
 }
 
-class KGenerativeConstructor extends KConstructor {
-  KGenerativeConstructor(int constructorIndex, KClass enclosingClass, Name name,
-      ParameterStructure parameterStructure, {bool isExternal, bool isConst})
-      : super(constructorIndex, enclosingClass, name, parameterStructure,
-            isExternal: isExternal, isConst: isConst);
-
-  @override
-  bool get isFactoryConstructor => false;
-
-  @override
-  bool get isGenerativeConstructor => true;
-}
-
-class KFactoryConstructor extends KConstructor {
-  @override
-  final bool isFromEnvironmentConstructor;
-
-  KFactoryConstructor(int memberIndex, KClass enclosingClass, Name name,
-      ParameterStructure parameterStructure,
-      {bool isExternal, bool isConst, this.isFromEnvironmentConstructor})
-      : super(memberIndex, enclosingClass, name, parameterStructure,
-            isExternal: isExternal, isConst: isConst);
-
-  @override
-  bool get isFactoryConstructor => true;
-
-  @override
-  bool get isGenerativeConstructor => false;
+abstract class IndexedClass implements ClassEntity {
+  /// Class index used for fast lookup in [KernelToElementMapBase].
+  int get classIndex;
 }
 
-class KMethod extends KFunction {
-  final bool isAbstract;
-
-  KMethod(int memberIndex, KLibrary library, KClass enclosingClass, Name name,
-      ParameterStructure parameterStructure, AsyncMarker asyncMarker,
-      {bool isStatic, bool isExternal, this.isAbstract})
-      : super(memberIndex, library, enclosingClass, name, parameterStructure,
-            asyncMarker,
-            isStatic: isStatic, isExternal: isExternal);
-
-  @override
-  bool get isFunction => true;
-
-  String get _kind => 'method';
+abstract class IndexedMember implements MemberEntity {
+  /// Member index used for fast lookup in [KernelToElementMapBase].
+  int get memberIndex;
 }
 
-class KGetter extends KFunction {
-  final bool isAbstract;
-
-  KGetter(int memberIndex, KLibrary library, KClass enclosingClass, Name name,
-      AsyncMarker asyncMarker,
-      {bool isStatic, bool isExternal, this.isAbstract})
-      : super(memberIndex, library, enclosingClass, name,
-            const ParameterStructure.getter(), asyncMarker,
-            isStatic: isStatic, isExternal: isExternal);
-
-  @override
-  bool get isGetter => true;
-
-  String get _kind => 'getter';
-}
+abstract class IndexedFunction implements IndexedMember, FunctionEntity {}
 
-class KSetter extends KFunction {
-  final bool isAbstract;
+abstract class IndexedConstructor
+    implements IndexedFunction, ConstructorEntity {}
 
-  KSetter(int memberIndex, KLibrary library, KClass enclosingClass, Name name,
-      {bool isStatic, bool isExternal, this.isAbstract})
-      : super(memberIndex, library, enclosingClass, name,
-            const ParameterStructure.setter(), AsyncMarker.SYNC,
-            isStatic: isStatic, isExternal: isExternal);
-
-  @override
-  bool get isAssignable => true;
-
-  @override
-  bool get isSetter => true;
-
-  String get _kind => 'setter';
-}
-
-class KField extends KMember implements FieldEntity {
-  final bool isAssignable;
-  final bool isConst;
-
-  KField(int memberIndex, KLibrary library, KClass enclosingClass, Name name,
-      {bool isStatic, this.isAssignable, this.isConst})
-      : super(memberIndex, library, enclosingClass, name, isStatic: isStatic);
-
-  @override
-  bool get isField => true;
-
-  String get _kind => 'field';
-}
-
-class KTypeVariable implements TypeVariableEntity {
-  final Entity typeDeclaration;
-  final String name;
-  final int index;
-
-  KTypeVariable(this.typeDeclaration, this.name, this.index);
-
-  String toString() => 'type_variable(${typeDeclaration.name}.$name)';
-}
-
-class KLocalFunction implements Local {
-  final String name;
-  final MemberEntity memberContext;
-  final Entity executableContext;
-  final FunctionType functionType;
-
-  KLocalFunction(
-      this.name, this.memberContext, this.executableContext, this.functionType);
-
-  String toString() =>
-      'local_function(${memberContext.name}.${name ?? '<anonymous>'})';
-}
+abstract class IndexedField implements IndexedMember, FieldEntity {}