| // Copyright (c) 2019, 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. |
| |
| /// @assertion Dynamic Semantics |
| /// The new dynamic semantics are a superset of the original behavior. To avoid |
| /// redundancy and handle nested uses, the semantics are expressed in terms of a |
| /// separate procedure below: |
| /// . . . |
| /// Sets |
| /// |
| /// 1. Create a fresh instance [collection] of a class that implements [Set<E>]. |
| /// |
| /// 2. For each [element] in the set literal: |
| /// i. Evaluate [element] using the procedure below. |
| /// |
| /// 3. The result of the literal expression is [collection]. |
| /// . . . |
| /// To evaluate a collection [element]: |
| /// This procedure handles elements in both list and map literals because the |
| /// only difference is how a base expression element or entry element is handled. |
| /// The control flow parts are the same so are unified here. |
| /// |
| /// 1. If [element] is an [if] element: |
| /// |
| /// i. Evaluate the condition expression to a value [condition]. |
| /// ii. Subject [condition] to boolean conversion to a value [result]. |
| /// iii. If [result] is [true]: |
| /// a. Evaluate the "then" element using this procedure. |
| /// iv. Else, if there is an "else" element of the [if]: |
| /// a. Evaluate the "else" element using this procedure. |
| /// . . . |
| /// @description Checks that if [element] of set literal is an [if] element, this |
| /// element is evaluated using the specified procedure. |
| /// @author ngl@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| const t = false; |
| const int x = 1; |
| |
| var set1exp = new Set<int>(); |
| if (t) { |
| set1exp.add(x); |
| } else { |
| set1exp.add(x + 10); |
| } |
| if (!t) { |
| set1exp.add(x + 1); |
| } else { |
| set1exp.add(x + 11); |
| } |
| set1exp.add(-1); |
| Expect.isTrue(set1exp is Set<int>); |
| checkType(checkIs<Set<int>>, true, set1exp); |
| |
| var set1 = <int>{if (t) x else x + 10, if (!t) x + 1 else x + 11, -1}; |
| // set1exp {11, 2, -1} |
| Expect.setEquals(set1exp, set1); |
| Expect.isTrue(set1 is Set<int>); |
| checkType(checkIs<Set<int>>, true, set1); |
| |
| var set2exp = new Set<int>(); |
| if (t) { |
| set2exp.add(x); |
| } else { |
| if (!t) { |
| set2exp.add(x); |
| } else { |
| set2exp.add(x + 10); |
| } |
| } |
| if (!t) { |
| set2exp.add(x + 1); |
| } else { |
| set2exp.add(x + 11); |
| } |
| set2exp.add(-1); |
| Expect.isTrue(set2exp is Set<int>); |
| checkType(checkIs<Set<int>>, true, set2exp); |
| |
| var set2 = <int>{ |
| if (t) x else if (!t) x else x + 10, |
| if (!t) x + 1 else x + 11, -1 |
| }; |
| // set2exp {1, 2, -1} |
| Expect.setEquals(set2exp, set2); |
| Expect.isTrue(set2 is Set<int>); |
| checkType(checkIs<Set<int>>, true, set2); |
| |
| var set3exp = new Set<int>(); |
| if (t) { |
| set3exp.add(x); |
| } else { |
| set3exp.add(x + 10); |
| } |
| if (!t) { |
| if (t) { |
| set3exp.add(x + 1); |
| } else { |
| set3exp.add(x + 11); |
| } |
| } else { |
| set3exp.add(x + 12); |
| } |
| set3exp.add(-1); |
| Expect.isTrue(set3exp is Set<int>); |
| checkType(checkIs<Set<int>>, true, set3exp); |
| |
| var set3 = { |
| if (t) x else x + 10, |
| if (!t) if (t) x + 1 else x + 11 else x + 12, -1 |
| }; |
| // set3exp {11, 12, -1} |
| Expect.setEquals(set3exp, set3); |
| Expect.isTrue(set3 is Set<int>); |
| checkType(checkIs<Set<int>>, true, set3); |
| } |