// Copyright 2016 Google Inc. Use of this source code is governed by an
// MIT-style license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT.

import '../visitor/interface/value.dart';
import '../value.dart';

const sassTrue = const SassBoolean._(true);
const sassFalse = const SassBoolean._(false);

class SassBoolean extends Value {
  final bool value;

  bool get isTruthy => value;

  factory SassBoolean(bool value) => value ? sassTrue : sassFalse;

  const SassBoolean._(this.value);

  /*=T*/ accept/*<T>*/(ValueVisitor/*<T>*/ visitor) =>
      visitor.visitBoolean(this);

  Value unaryNot() => value ? sassFalse : sassTrue;
}