mirror of
https://github.com/golang/go
synced 2024-10-05 21:21:21 -06:00
fd4dc91a96
The function is here ONLY for symmetry with package bytes. This function should be used ONLY if it makes code clearer. It is not here for performance. Remove any performance benefit. If performance becomes an issue, the compiler should be fixed to recognize the three-way compare (for all comparable types) rather than encourage people to micro-optimize by using this function. Change-Id: I71f4130bce853f7aef724c6044d15def7987b457 Reviewed-on: https://go-review.googlesource.com/3012 Reviewed-by: Rob Pike <r@golang.org>
29 lines
1.1 KiB
Go
29 lines
1.1 KiB
Go
// Copyright 2015 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 strings
|
|
|
|
// Compare returns an integer comparing two strings lexicographically.
|
|
// The result will be 0 if a==b, -1 if a < b, and +1 if a > b.
|
|
//
|
|
// Compare is included only for symmetry with package bytes.
|
|
// It is usually clearer and always faster to use the built-in
|
|
// string comparison operators ==, <, >, and so on.
|
|
func Compare(a, b string) int {
|
|
// NOTE(rsc): This function does NOT call the runtime cmpstring function,
|
|
// because we do not want to provide any performance justification for
|
|
// using strings.Compare. Basically no one should use strings.Compare.
|
|
// As the comment above says, it is here only for symmetry with package bytes.
|
|
// If performance is important, the compiler should be changed to recognize
|
|
// the pattern so that all code doing three-way comparisons, not just code
|
|
// using strings.Compare, can benefit.
|
|
if a == b {
|
|
return 0
|
|
}
|
|
if a < b {
|
|
return -1
|
|
}
|
|
return +1
|
|
}
|