| // Copyright (c) 2011, 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 Let d be the declaration of a variable v. If d is a local or |
| /// instance variable, then the invocation of the implicit getter of v |
| /// evaluates to the value stored in v. |
| /// If d is a static or library variable then the implicit getter method of v |
| /// executes as follows: |
| /// - Non-constant variable declaration with initializer. If d is of one of the |
| /// forms var v = e; , T v = e; , final v = e; , final T v = e; , static |
| /// v = e; , static T v = e; , static final v = e; or static final T v = e; |
| /// and no value has yet been stored into v then the initializer expression |
| /// e is evaluated. If, during the evaluation of e, the getter for v is |
| /// invoked, a CyclicInitializationError is thrown. If the evaluation |
| /// succeeded yielding an object o, let r = o, otherwise let r = null. In |
| /// any case, r is stored into v. The result of executing the getter is r. |
| /// - Constant variable declaration. If d is of one of the forms const v = e; , |
| /// const T v = e; , static const v = e; or static const T v = e; the result |
| /// of the getter is the value of the compile time constant e. Note that a |
| /// compile time constant cannot depend on itself, so no cyclic references |
| /// can occur. Otherwise |
| /// - Variable declaration without initializer. The result of executing the |
| /// getter method is the value stored in v. |
| /// |
| /// @note NNBD Spec now reads: If a variable or field is read from during the |
| /// process of evaluating its own initializer expression, and no write to the |
| /// variable has occurred, the read is treated as a first read and the |
| /// nitializer expression is evaluated again. |
| /// |
| /// A toplevel or static variable with an initializer is evaluated as if it was |
| /// marked [late]. Note that this is a change from pre-NNBD semantics in that: |
| /// |
| /// Reading the variable during initializer evaluation is no longer checked for, |
| /// and does not cause an error. |
| /// |
| /// @description Checks that an error is not thrown when getter is referenced |
| /// during evaluation of initialization expression. |
| /// @author kaigorodov |
| /// @Issue 42470 |
| /// @issue 42642 |
| |
| import "../../../Utils/expect.dart"; |
| |
| int count = 0; |
| |
| int f() { |
| return count++ < 20 ? C.sTyped : count; |
| } |
| |
| class C { |
| static int sTyped = f(); |
| } |
| |
| main() { |
| Expect.equals (21, C.sTyped); |
| } |