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regexp: issue parse string #68940

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Alter-stack opened this issue Aug 19, 2024 · 3 comments
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regexp: issue parse string #68940

Alter-stack opened this issue Aug 19, 2024 · 3 comments

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@Alter-stack
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Alter-stack commented Aug 19, 2024 •
edited by seankhliao
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Go version

go1.20

Output of go env in your module/workspace:

GOPRIVATE=""
GOPROXY="https://goproxy.cn,direct"
GOROOT="/Users/xxxx/go1.20/go1.20"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/Users/xxxx/go1.20/go1.20/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.20"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/jl/_cckn_y96kg7wnz6t3624xkr0000gn/T/go-build4144142847=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

func main() {
	pattern := fmt.Sprintf(`\b%s\b`, "ch")
	regex := regexp.MustCompile(pattern)
	result := regex.ReplaceAllStringFunc("chácara", func(match string) string {
		trimmedMatch := strings.TrimSpace(match)
		replacement := "replacement"
		return strings.ReplaceAll(match, trimmedMatch, replacement)
	})
	fmt.Println(result)
}

What did you see happen?

actually result is "replacementácara"

What did you expect to see?

except result is "chácara"
@Alter-stack
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sorry， code is：

func main() {
	pattern := fmt.Sprintf(`\b%s\b`, "ch")

	regex := regexp.MustCompile(pattern)
	result := regex.ReplaceAllStringFunc("chácara", func(match string) string {
		trimmedMatch := strings.TrimSpace(match)
		replacement := "replacement"
		return strings.ReplaceAll(match, trimmedMatch, replacement)
	})
	fmt.Println(result)
}

@gabyhelp
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Related Issues and Documentation

(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)

@seankhliao
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see https://github.com/google/re2/wiki/Syntax
word boundaries use only ascii

Unlike many projects, the Go project does not use GitHub Issues for general discussion or asking questions. GitHub Issues are used for tracking bugs and proposals only.

For questions please refer to https://github.com/golang/go/wiki/Questions

@seankhliao seankhliao closed this as not planned Won't fix, can't repro, duplicate, stale Aug 19, 2024
This was referenced Sep 11, 2024
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@seankhliao @Alter-stack @gabyhelp