Cleanup equality operator to accept any Object rather than just a SourceLocation.

BUG=
R=nweiz@google.com

Review URL: https://codereview.chromium.org//881673002

pkgs/source_span/CHANGELOG.md

diff --git a/pkgs/source_span/CHANGELOG.md b/pkgs/source_span/CHANGELOG.md
index f057e9b..195bcf8 100644
--- a/pkgs/source_span/CHANGELOG.md
+++ b/pkgs/source_span/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 1.0.3
+
+* Cleanup equality operator to accept any Object rather than just a
+  `SourceLocation`.
+
 # 1.0.2
 
 * Avoid unintentionally allocating extra objects for internal `FileSpan`

pkgs/source_span/lib/src/location.dart

diff --git a/pkgs/source_span/lib/src/location.dart b/pkgs/source_span/lib/src/location.dart
index 41f2518..2705742 100644
--- a/pkgs/source_span/lib/src/location.dart
+++ b/pkgs/source_span/lib/src/location.dart
@@ -77,8 +77,9 @@
     return offset - other.offset;
   }
 
-  bool operator ==(SourceLocation other) =>
-      sourceUrl == other.sourceUrl && offset == other.offset;
+  bool operator ==(other) =>
+      other is SourceLocation && sourceUrl == other.sourceUrl &&
+      offset == other.offset;
 
   int get hashCode => sourceUrl.hashCode + offset;
 

pkgs/source_span/pubspec.yaml

diff --git a/pkgs/source_span/pubspec.yaml b/pkgs/source_span/pubspec.yaml
index 55ac89a..03b290b 100644
--- a/pkgs/source_span/pubspec.yaml
+++ b/pkgs/source_span/pubspec.yaml
@@ -1,6 +1,6 @@
 name: source_span
 
-version: 1.0.2
+version: 1.0.3
 author: Dart Team <misc@dartlang.org>
 description: A library for identifying source spans and locations.
 homepage: http://github.com/dart-lang/source_span