Implement DeclarationMirror.location for all but ParameterMirrors.

tests/lib/mirrors/other_declarations_location_test.dart

+// Copyright (c) 2015, 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 test.declarations_location;
+
+import "dart:mirrors";
+import "package:expect/expect.dart";
+import "library_without_declaration.dart";
+import "library_with_annotated_declaration.dart";
+
+const metadata = 'metadata';
+
+class C<S, @metadata T> {
+  var a;
+  final b = 2;
+  static var c;
+  static final d = 4;
+  @metadata var e;
+  List<C> f;
+}
+
+
+// We only check for a suffix of the uri because the test might be run from
+// any number of absolute paths.
+expectLocation(DeclarationMirror mirror, String uriSuffix, int line, int column) {
+  Uri uri = mirror.location.sourceUri;
+  Expect.isTrue(uri.toString().endsWith(uriSuffix),
+                "Expected suffix $uriSuffix in $uri");
+  Expect.equals(line, mirror.location.line, "line");
+  Expect.equals(column, mirror.location.column, "column");
+}
+
+main() {
+  String mainSuffix = 'other_declarations_location_test.dart';
+
+  // Fields.
+  expectLocation(reflectClass(C).declarations[#a], mainSuffix, 15, 7);
+  expectLocation(reflectClass(C).declarations[#b], mainSuffix, 16, 9);
+  expectLocation(reflectClass(C).declarations[#c], mainSuffix, 17, 14);
+  expectLocation(reflectClass(C).declarations[#d], mainSuffix, 18, 16);
+  expectLocation(reflectClass(C).declarations[#e], mainSuffix, 19, 17);
+  expectLocation(reflectClass(C).declarations[#f], mainSuffix, 20, 11);
+
+  // Type variables.
+  expectLocation(reflectClass(C).declarations[#S], mainSuffix, 14, 9);
+  expectLocation(reflectClass(C).declarations[#T], mainSuffix, 14, 12);
+  
+  // Libraries.
+  expectLocation(reflectClass(C).owner, mainSuffix, 5, 1);
+  expectLocation(reflectClass(ClassInLibraryWithoutDeclaration).owner,
+                 "library_without_declaration.dart", 1, 1);
+  expectLocation(reflectClass(ClassInLibraryWithAnnotatedDeclaration).owner,
+                 "library_with_annotated_declaration.dart", 5, 1);
+}