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strings: fix minor bug in LastIndexFunc

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R=r, rsc
CC=golang-dev
https://golang.org/cl/2250042
This commit is contained in:
Roger Peppe 2010-09-21 22:58:09 -04:00 committed by Russ Cox
parent b11740fb6d
commit 8ee986570a
2 changed files with 2 additions and 1 deletions
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2
src/pkg/strings/strings.go
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@ -463,7 +463,7 @@ func lastIndexFunc(s string, f func(r int) bool, truth bool) int {
} }
} }
if start < 0 { if start < 0 {
return -1 start = 0
} }
var wid int var wid int
rune, wid = utf8.DecodeRuneInString(s[start:end]) rune, wid = utf8.DecodeRuneInString(s[start:end])

1
src/pkg/strings/strings_test.go
View File

@ -514,6 +514,7 @@ var indexFuncTests = []IndexFuncTest{
IndexFuncTest{"\xc0☺\xc0\xc0", not(isValidRune), 0, 5}, IndexFuncTest{"\xc0☺\xc0\xc0", not(isValidRune), 0, 5},
IndexFuncTest{"ab\xc0a\xc0cd", not(isValidRune), 2, 4}, IndexFuncTest{"ab\xc0a\xc0cd", not(isValidRune), 2, 4},
IndexFuncTest{"a\xe0\x80cd", not(isValidRune), 1, 2}, IndexFuncTest{"a\xe0\x80cd", not(isValidRune), 1, 2},
IndexFuncTest{"\x80\x80\x80\x80", not(isValidRune), 0, 3},
} }
func TestIndexFunc(t *testing.T) { func TestIndexFunc(t *testing.T) {