Line data Source code
1 : // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
2 : // for details. All rights reserved. Use of this source code is governed by a
3 : // BSD-style license that can be found in the LICENSE file.
4 :
5 : import '../boolean_selector.dart';
6 : import 'intersection_selector.dart';
7 :
8 : /// A selector that matches inputs that either of its sub-selectors match.
9 : class UnionSelector implements BooleanSelector {
10 : final BooleanSelector _selector1;
11 : final BooleanSelector _selector2;
12 :
13 0 : UnionSelector(this._selector1, this._selector2);
14 :
15 : List<String> get variables =>
16 0 : _selector1.variables.toList()..addAll(_selector2.variables);
17 :
18 : bool evaluate(semantics) =>
19 0 : _selector1.evaluate(semantics) || _selector2.evaluate(semantics);
20 :
21 : BooleanSelector intersection(BooleanSelector other) =>
22 0 : new IntersectionSelector(this, other);
23 :
24 : BooleanSelector union(BooleanSelector other) =>
25 0 : new UnionSelector(this, other);
26 :
27 : void validate(bool isDefined(String variable)) {
28 0 : _selector1.validate(isDefined);
29 0 : _selector2.validate(isDefined);
30 : }
31 :
32 0 : String toString() => "($_selector1) && ($_selector2)";
33 :
34 : bool operator==(other) =>
35 0 : other is UnionSelector &&
36 0 : _selector1 == other._selector1 &&
37 0 : _selector2 == other._selector2;
38 :
39 0 : int get hashCode => _selector1.hashCode ^ _selector2.hashCode;
40 : }
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