Fasta builders.

pkg/fasta/lib/src/builder/procedure_builder.dart

+// Copyright (c) 2016, 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 fasta.procedure_builder;
+
+// Note: we're deliberately using AsyncMarker and ProcedureKind from kernel
+// outside the kernel-specific builders. This is simpler than creating
+// additional enums.
+import 'package:kernel/ast.dart' show
+    AsyncMarker,
+    ProcedureKind;
+
+import 'builder.dart' show
+    Builder,
+    FormalParameterBuilder,
+    MemberBuilder,
+    MetadataBuilder,
+    TypeBuilder,
+    TypeVariableBuilder;
+
+import 'scope.dart' show
+    Scope;
+
+abstract class ProcedureBuilder<T extends TypeBuilder> extends MemberBuilder {
+  final List<MetadataBuilder> metadata;
+
+  final int modifiers;
+
+  final T returnType;
+
+  final String name;
+
+  final List<TypeVariableBuilder> typeVariables;
+
+  final List<FormalParameterBuilder> formals;
+
+  ProcedureBuilder(this.metadata, this.modifiers, this.returnType, this.name,
+      this.typeVariables, this.formals);
+
+  AsyncMarker get asyncModifier;
+
+  ProcedureKind get kind;
+
+  bool get isConstructor => false;
+
+  bool get isRegularMethod => identical(ProcedureKind.Method, kind);
+
+  bool get isGetter => identical(ProcedureKind.Getter, kind);
+
+  bool get isSetter => identical(ProcedureKind.Setter, kind);
+
+  bool get isOperator => identical(ProcedureKind.Operator, kind);
+
+  bool get isFactory => identical(ProcedureKind.Factory, kind);
+
+  void set body(statement);
+
+  /// This is the formal parameter scope as specified in the Dart Programming
+  /// Language Specifiction, 4th ed, section 9.2.
+  Scope computeFormalParameterScope(Scope parent) {
+    if (formals == null) return parent;
+    Map<String, Builder> local = <String, Builder>{};
+    for (FormalParameterBuilder formal in formals) {
+      if (!formal.hasThis) {
+        local[formal.name] = formal;
+      }
+    }
+    return new Scope(local, parent, isModifiable: false);
+  }
+
+  /// This scope doesn't correspond to any scope specified in the Dart
+  /// Programming Language Specifiction, 4th ed. It's an unspecified extension
+  /// to support generic methods.
+  Scope computeTypeParameterScope(Scope parent) {
+    if (typeVariables == null) return parent;
+    Map<String, Builder> local = <String, Builder>{};
+    for (TypeVariableBuilder variable in typeVariables) {
+      local[variable.name] = variable;
+    }
+    return new Scope(local, parent, isModifiable: false);
+  }
+}