Johnni Winther
1114d0c30f
In preparation for fixing https://github.com/dart-lang/sdk/issues/51812 Change-Id: I810be0a0330f0bf90fc1230b5a2d17f695d6e46b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292007 Reviewed-by: Jens Johansen <jensj@google.com> Commit-Queue: Johnni Winther <johnniwinther@google.com>
30 lines
757 B
Dart
30 lines
757 B
Dart
// Copyright (c) 2023, 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:math' show pi;
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abstract class Shape {}
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class Square implements Shape {
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final double length;
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Square(this.length);
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}
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class Circle implements Shape {
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final double radius;
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Circle(this.radius);
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}
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double calculateArea(Shape shape) => switch (shape) {
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Square(length: var l) when l >= 0 => l * l,
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Circle(radius: var r) when r >= 0 => pi * r * r,
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Square(length: var l) when l < 0 => -1,
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Circle(radius: var r) when r < 0 => -1,
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Shape() => 0
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};
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testMain() {
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calculateArea(Circle(-123));
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}
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