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x/text/language: Match() choses the wrong Tag #37662

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Flamefork opened this issue Mar 4, 2020 · 1 comment
Open

x/text/language: Match() choses the wrong Tag #37662

Flamefork opened this issue Mar 4, 2020 · 1 comment

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@Flamefork
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@Flamefork Flamefork commented Mar 4, 2020

What version of Go are you using (go version)?

$ go version
go version go1.14 linux/amd64

Does this issue reproduce with the latest release?

Yes.

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build210008815=/tmp/go-build -gno-record-gcc-switches"

What did you do?

https://play.golang.org/p/_qlIzcAWD5F

package main

import (
	"fmt"
	"golang.org/x/text/language"
)

func main() {
	matcher := language.NewMatcher([]language.Tag{
		language.MustParse("en-GB"),
		language.MustParse("fr-FR"),
		language.MustParse("es-ES"),
	})
	tag, _, confidence := matcher.Match(
		language.MustParse("en"),
		language.MustParse("fr"),
		language.MustParse("en-US"),
	)
	fmt.Printf("best match: %s, confidence: %s\n", tag, confidence)
}

What did you expect to see?

best match: en-GB, confidence: High

What did you see instead?

best match: fr-FR, confidence: Exact
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