| // 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. |
| |
| // Test conversion operations. |
| |
| package main |
| |
| func left(x int) { _ = 1 << x } |
| func right(x int) { _ = 1 >> x } |
| |
| func main() { |
| wantPanic( |
| func() { |
| left(-1) |
| }, |
| "runtime error: negative shift amount", |
| ) |
| wantPanic( |
| func() { |
| right(-1) |
| }, |
| "runtime error: negative shift amount", |
| ) |
| } |
| |
| func wantPanic(fn func(), s string) { |
| defer func() { |
| err := recover() |
| if err == nil { |
| panic("expected panic") |
| } |
| if got := err.(error).Error(); got != s { |
| panic("expected panic " + s + " got " + got) |
| } |
| }() |
| fn() |
| } |
