Index: pkg/yaml/lib/src/deep_equals.dart |
diff --git a/pkg/yaml/lib/src/deep_equals.dart b/pkg/yaml/lib/src/deep_equals.dart |
deleted file mode 100644 |
index 68fb236a078e11594d979ad67b9a8f316e87c840..0000000000000000000000000000000000000000 |
--- a/pkg/yaml/lib/src/deep_equals.dart |
+++ /dev/null |
@@ -1,81 +0,0 @@ |
-// Copyright (c) 2012, 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 yaml.deep_equals; |
- |
-/// Returns whether two objects are structurally equivalent. |
-/// |
-/// This considers `NaN` values to be equivalent. It also handles |
-/// self-referential structures. |
-bool deepEquals(obj1, obj2) => new _DeepEquals().equals(obj1, obj2); |
- |
-/// A class that provides access to the list of parent objects used for loop |
-/// detection. |
-class _DeepEquals { |
- final _parents1 = []; |
- final _parents2 = []; |
- |
- /// Returns whether [obj1] and [obj2] are structurally equivalent. |
- bool equals(obj1, obj2) { |
- // _parents1 and _parents2 are guaranteed to be the same size. |
- for (var i = 0; i < _parents1.length; i++) { |
- var loop1 = identical(obj1, _parents1[i]); |
- var loop2 = identical(obj2, _parents2[i]); |
- // If both structures loop in the same place, they're equal at that point |
- // in the structure. If one loops and the other doesn't, they're not |
- // equal. |
- if (loop1 && loop2) return true; |
- if (loop1 || loop2) return false; |
- } |
- |
- _parents1.add(obj1); |
- _parents2.add(obj2); |
- try { |
- if (obj1 is List && obj2 is List) { |
- return _listEquals(obj1, obj2); |
- } else if (obj1 is Map && obj2 is Map) { |
- return _mapEquals(obj1, obj2); |
- } else if (obj1 is num && obj2 is num) { |
- return _numEquals(obj1, obj2); |
- } else { |
- return obj1 == obj2; |
- } |
- } finally { |
- _parents1.removeLast(); |
- _parents2.removeLast(); |
- } |
- } |
- |
- /// Returns whether [list1] and [list2] are structurally equal. |
- bool _listEquals(List list1, List list2) { |
- if (list1.length != list2.length) return false; |
- |
- for (var i = 0; i < list1.length; i++) { |
- if (!equals(list1[i], list2[i])) return false; |
- } |
- |
- return true; |
- } |
- |
- /// Returns whether [map1] and [map2] are structurally equal. |
- bool _mapEquals(Map map1, Map map2) { |
- if (map1.length != map2.length) return false; |
- |
- for (var key in map1.keys) { |
- if (!map2.containsKey(key)) return false; |
- if (!equals(map1[key], map2[key])) return false; |
- } |
- |
- return true; |
- } |
- |
- /// Returns whether two numbers are equivalent. |
- /// |
- /// This differs from `n1 == n2` in that it considers `NaN` to be equal to |
- /// itself. |
- bool _numEquals(num n1, num n2) { |
- if (n1.isNaN && n2.isNaN) return true; |
- return n1 == n2; |
- } |
-} |