22 lignes
686 o
Go
22 lignes
686 o
Go
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package reflectutil
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import "reflect"
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// Swapper returns a function which swaps the elements in slice.
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// Swapper panics if the provided interface is not a slice.
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//
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// Its goal is to work safely and efficiently for all versions and
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// variants of Go: pre-Go1.5, Go1.5+, safe, unsafe, App Engine,
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// GopherJS, etc.
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func Swapper(slice interface{}) func(i, j int) {
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v := reflect.ValueOf(slice)
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if v.Kind() != reflect.Slice {
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panic(&reflect.ValueError{Method: "reflectutil.Swapper", Kind: v.Kind()})
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}
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return swapper(v)
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}
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