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Diffstat (limited to 'libgo/go/strings/compare.go')
| -rw-r--r-- | libgo/go/strings/compare.go | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/libgo/go/strings/compare.go b/libgo/go/strings/compare.go new file mode 100644 index 00000000000..b84dddea74e --- /dev/null +++ b/libgo/go/strings/compare.go @@ -0,0 +1,28 @@ +// 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 +} |