| // Copyright (c) 2014, the Dart project authors. |
| // Copyright (c) 2006, Kirill Simonov. |
| // |
| // Use of this source code is governed by an MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT. |
| |
| import 'package:source_span/source_span.dart'; |
| |
| /// A [SourceSpan] with no location information. |
| /// |
| /// This is used with [YamlMap.wrap] and [YamlList.wrap] to provide means of |
| /// accessing a non-YAML map that behaves transparently like a map parsed from |
| /// YAML. |
| class NullSpan extends SourceSpanMixin { |
| @override |
| final SourceLocation start; |
| @override |
| SourceLocation get end => start; |
| @override |
| final text = ''; |
| |
| NullSpan(sourceUrl) : start = SourceLocation(0, sourceUrl: sourceUrl); |
| } |
