| // Copyright (c) 2012, 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. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| // Test cascades. |
| |
| class A { |
| int x; |
| int y; |
| |
| A(this.x, this.y); |
| |
| A setX(int x) { |
| this.x = x; |
| return this; |
| } |
| |
| void setY(int y) { |
| this.y = y; |
| } |
| |
| Function swap() { |
| int tmp = x; |
| x = y; |
| y = tmp; |
| return this.swap; |
| } |
| |
| void check(int x, int y) { |
| Expect.equals(x, this.x); |
| Expect.equals(y, this.y); |
| } |
| |
| operator [](var i) { |
| if (i == 0) return x; |
| if (i == 1) return y; |
| if (i == "swap") return this.swap; |
| return null; |
| } |
| |
| operator []=(int i, int value) { |
| if (i == 0) { |
| x = value; |
| } else if (i == 1) { |
| y = value; |
| } |
| } |
| |
| /** |
| * A pseudo-keyword. |
| */ |
| import() { |
| x++; |
| } |
| } |
| |
| main() { |
| A a = new A(1, 2); |
| a |
| ..check(1, 2) |
| ..swap() |
| ..check(2, 1) |
| ..x = 4 |
| ..y = 9 |
| ..check(4, 9) |
| ..setX(10) |
| ..check(10, 9) |
| ..y = 5 |
| ..check(10, 5) |
| ..swap()()() |
| ..check(5, 10) |
| ..[0] = 2 |
| ..check(2, 10) |
| ..setX(10).setY(3) |
| ..check(10, 3) |
| ..setX(7)["swap"]() |
| ..check(3, 7) |
| ..import() |
| ..check(4, 7) |
| ..["swap"]()()() |
| ..check(7, 4); |
| a.check(7, 4); |
| a..(42); |
| // ^ |
| // [analyzer] SYNTACTIC_ERROR.MISSING_IDENTIFIER |
| // [cfe] Expected an identifier, but got ''. |
| // ^ |
| // [cfe] Expected an identifier, but got '('. |
| a..37; |
| // ^^ |
| // [analyzer] SYNTACTIC_ERROR.MISSING_IDENTIFIER |
| // [cfe] Expected an identifier, but got '37'. |
| a.."foo"; |
| // ^^^^^ |
| // [analyzer] SYNTACTIC_ERROR.MISSING_IDENTIFIER |
| // [cfe] Expected an identifier, but got '"foo"'. |
| } |