mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
b0bfee6627
The implementation of const map literals is based on linear lookups in an array containing key/value pairs instead of a hash table. Bug: https://github.com/dart-lang/sdk/issues/45908 Golem CL: https://chrome-internal-review.googlesource.com/c/golem/+/3852562 Change-Id: If0a980339ee1342c41f9388e0bd7b3615a4ef4e3 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/200188 Commit-Queue: Daco Harkes <dacoharkes@google.com> Reviewed-by: Jonas Termansen <sortie@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
43 lines
1.5 KiB
Dart
43 lines
1.5 KiB
Dart
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:io';
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void main() {
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final buffer = StringBuffer();
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buffer.write('''
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// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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''');
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generateMap(buffer, 'const1', 1, isConst: true);
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generateMap(buffer, 'final1', 1, isConst: false);
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generateMap(buffer, 'const5', 5, isConst: true);
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generateMap(buffer, 'final5', 5, isConst: false);
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generateMap(buffer, 'const10', 10, isConst: true);
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generateMap(buffer, 'final10', 10, isConst: false);
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generateMap(buffer, 'const100', 100, isConst: true);
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generateMap(buffer, 'final100', 100, isConst: false);
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for (final folder in ['dart', 'dart2']) {
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final path = Platform.script.resolve('$folder/maps.dart').toFilePath();
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File(path).writeAsStringSync(buffer.toString());
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Process.runSync(Platform.executable, ['format', path]);
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print('Generated $path.');
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}
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}
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void generateMap(StringBuffer buffer, String name, int mapSize,
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{bool isConst = true}) {
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final constOrFinal = isConst ? 'const' : 'final';
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buffer.write('$constOrFinal $name = <String, String>{');
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for (int i = 0; i < mapSize; i++) {
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buffer.write("'$i': '${i + 1}',");
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}
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buffer.write('};');
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buffer.write('\n\n');
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}
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