// Copyright (c) 2022, 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.

import 'package:kernel/ast.dart';

import '../source/source_library_builder.dart';
import 'library_builder.dart';
import 'named_type_builder.dart';
import 'nullability_builder.dart';
import 'type_builder.dart';

class OmittedTypeBuilder extends TypeBuilder {
  const OmittedTypeBuilder();

  @override
  DartType build(LibraryBuilder library, TypeUse typeUse) {
    throw new UnsupportedError('$runtimeType.build');
  }

  @override
  DartType buildAliased(LibraryBuilder library, TypeUse typeUse) {
    throw new UnsupportedError('$runtimeType.buildAliased');
  }

  @override
  Supertype? buildMixedInType(LibraryBuilder library) {
    throw new UnsupportedError('$runtimeType.buildMixedInType');
  }

  @override
  Supertype? buildSupertype(LibraryBuilder library) {
    throw new UnsupportedError('$runtimeType.buildSupertype');
  }

  @override
  int? get charOffset => null;

  @override
  TypeBuilder clone(
      List<NamedTypeBuilder> newTypes,
      SourceLibraryBuilder contextLibrary,
      TypeParameterScopeBuilder contextDeclaration) {
    return this;
  }

  @override
  String get debugName => 'OmittedTypeBuilder';

  @override
  Uri? get fileUri => null;

  @override
  bool get isVoidType => false;

  @override
  Object? get name => null;

  @override
  NullabilityBuilder get nullabilityBuilder =>
      const NullabilityBuilder.omitted();

  @override
  StringBuffer printOn(StringBuffer buffer) => buffer;

  @override
  TypeBuilder withNullabilityBuilder(NullabilityBuilder nullabilityBuilder) {
    return this;
  }
}