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// Copyright 2016 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 reflectutil
import "reflect"
// Swapper returns a function which swaps the elements in slice.
// Swapper panics if the provided interface is not a slice.
//
// Its goal is to work safely and efficiently for all versions and
// variants of Go: pre-Go1.5, Go1.5+, safe, unsafe, App Engine,
// GopherJS, etc.
//
// Deprecated: this moved to the Go standard library. Use
// reflect.Swapper in Go 1.8+ instead.
func Swapper(slice interface{}) func(i, j int) {
v := reflect.ValueOf(slice)
if v.Kind() != reflect.Slice {
panic(&reflect.ValueError{Method: "reflectutil.Swapper", Kind: v.Kind()})
}
return swapper(v)
}
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