Index: lib/src/union_selector.dart |
diff --git a/lib/src/union_selector.dart b/lib/src/union_selector.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..6b6cf87dad04f512c19a1beb8f5713529f82a9d2 |
--- /dev/null |
+++ b/lib/src/union_selector.dart |
@@ -0,0 +1,33 @@ |
+// 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. |
+ |
+import '../boolean_selector.dart'; |
+import 'intersection_selector.dart'; |
+ |
+/// A selector that matches inputs that either of its sub-selectors match. |
+class UnionSelector implements BooleanSelector { |
+ final BooleanSelector _selector1; |
+ final BooleanSelector _selector2; |
+ |
+ UnionSelector(this._selector1, this._selector2); |
+ |
+ List<String> get variables => |
+ _selector1.variables.toList()..addAll(_selector2.variables); |
+ |
+ bool evaluate(semantics) => |
+ _selector1.evaluate(semantics) || _selector2.evaluate(semantics); |
+ |
+ BooleanSelector intersection(BooleanSelector other) => |
+ new IntersectionSelector(this, other); |
+ |
+ BooleanSelector union(BooleanSelector other) => |
+ new UnionSelector(this, other); |
+ |
+ void validate(bool isDefined(String variable)) { |
+ _selector1.validate(isDefined); |
+ _selector2.validate(isDefined); |
+ } |
+ |
+ String toString() => "($_selector1) && ($_selector2)"; |
+} |