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// 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 CyclicInitializationError 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);