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// 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",
)
wantPanic(
func() {
const maxInt32 = 1<<31 - 1
var idx int64 = maxInt32*2 + 8
x := make([]int, 16)
_ = x[idx]
},
"runtime error: runtime error: index out of range [4294967302] with length 16",
)
}
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()
}
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