| // -lang=go1.12 |
| |
| // Copyright 2022 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package p |
| |
| type resultFlags uint |
| |
| // Example from #52031. |
| // |
| // The following shifts should not produce errors on Go < 1.13, as their |
| // untyped constant operands are representable by type uint. |
| const ( |
| _ resultFlags = (1 << iota) / 2 |
| |
| reportEqual |
| reportUnequal |
| reportByIgnore |
| reportByMethod |
| reportByFunc |
| reportByCycle |
| ) |
| |
| // Invalid cases. |
| var x int = 1 |
| var _ = (8 << x /* ERROR "signed shift count .* requires go1.13 or later" */) |
| |
| const _ = (1 << 1.2 /* ERROR "truncated to uint" */) |
| |
| var y float64 |
| var _ = (1 << y /* ERROR "must be integer" */) |
