| // Copyright (c) 2018, 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"; |
| |
| import "implicit_const_context_prefix_constructor_named_test.dart" as prefix; |
| |
| // Test that constructor invocations are constant |
| // when evaluated in a const context. |
| |
| class C { |
| final Object x; |
| const C.named(this.x); |
| |
| // Static const. |
| static const staticConst = prefix.C.named(42); |
| } |
| |
| // Top-level const. |
| const topConst = prefix.C.named(42); |
| |
| main() { |
| const c0 = const prefix.C.named(42); // Explicit const. |
| |
| // RHS of const local variable. |
| const c1 = prefix.C.named(42); |
| |
| // Inside const expression. |
| var c2 = (const [prefix.C.named(42)])[0]; // List element. |
| var c3 = (const {prefix.C.named(42): 0}).keys.first; // Map key. |
| var c4 = (const {0: prefix.C.named(42)}).values.first; // Map value. |
| var c5 = (const C.named(prefix.C.named(42))).x; // Constructor argument. |
| |
| Expect.identical(c0, c1); |
| Expect.identical(c0, c2); |
| Expect.identical(c0, c3); |
| Expect.identical(c0, c4); |
| Expect.identical(c0, c5); |
| Expect.identical(c0, C.staticConst); |
| Expect.identical(c0, topConst); |
| |
| // Switch case expression. |
| switch (c0) { |
| case prefix.C.named(42): |
| break; |
| default: |
| Expect.fail("Didn't match constant"); |
| } |
| |
| // Annotation argument. |
| // (Cannot check that it's const, just that it's accepted). |
| @C.named(prefix.C.named(42)) |
| var foo = null; |
| foo; // avoid "unused" hints. |
| } |