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bytes, strings: document that FieldsFunc f must not be stateful

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Fixes #8738.

LGTM=adg
R=golang-codereviews, adg
CC=golang-codereviews
https://golang.org/cl/143260045
This commit is contained in:
Russ Cox 2014-09-18 19:40:31 -04:00
parent ab76638cdc
commit e9ec8e7a26
2 changed files with 4 additions and 0 deletions
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2
src/bytes/bytes.go
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@ -267,6 +267,8 @@ func Fields(s []byte) [][]byte {
// It splits the slice s at each run of code points c satisfying f(c) and
// returns a slice of subslices of s. If all code points in s satisfy f(c), or
// len(s) == 0, an empty slice is returned.
// FieldsFunc makes no guarantees about the order in which it calls f(c).
// If f does not return consistent results for a given c, FieldsFunc may crash.
func FieldsFunc(s []byte, f func(rune) bool) [][]byte {
n := 0
inField := false