blob: 13bb717818fdd9cb1235504b79e3244a3351b0bb [file] [log] [blame]
// Copyright (c) 2017, 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 test for static checks on situations where expressions of type void
// can be used. The point is simply that there are no compile-time errors.
// We need expressions of type `void`; `void x` would do, but using
// `void get x` will work with tools that do not yet handle `void x`.
void get x => null;
void use(dynamic x) {}
main() {
// In an expressionStatement `e;`, e may have type void.
// In the initialization and increment expressions of a for-loop,
// `for (e1; e2; e3) {..}`, `e1` and `e3` may have type void.
for (x;; x) {
// In a typeCast `e as T`, `e` may have type void.
var y = x as Object?;
// In a parenthesized expression `(e)`, `e` may have type void.
// In a return statement `return e;`, when the return type of the
// innermost enclosing function is the type void, e may have type void.
void f() => x;
void g() {
return x;