kanaconv 
日本語のひらがなカタカナ、全角半角を変換するパッケージ written in Go
Installation
go get -u github.com/miiton/kanaconv
Usage
import (
"fmt"
"github.com/miiton/kanaconv"
)
func main() {
fmt.Println(kanaconv.HiraganaToKatakana("ひらがなをカタカナに"))
// ヒラガナヲカタカナニ
fmt.Println(kanaconv.KatakanaToHiragana("カタカナをひらがなに"))
// かたかなをひらがなに
fmt.Println(kanaconv.HankakuToZenkaku("ﾊﾝｶｸｦゼンカクﾆ"))
// ハンカクヲゼンカクニ
fmt.Println(kanaconv.ZenkakuToHankaku("ゼンカクヲﾊﾝｶｸニ"))
// ｾﾞﾝｶｸｦﾊﾝｶｸﾆ
fmt.Println(kanaconv.SmartConv("ｶﾀｶﾅは全角に統一ＥＩＳＵＵＪＩ＋＝−，記号は半角に統一します"))
// カタカナは全角に統一EISUUJI+=-,記号は半角に統一します
}
Benchmarks
- MacBook Air (11-inch, Mid 2011)
% go test -bench .
PASS
BenchmarkHiraganaToKatakana-4 1000000 1657 ns/op
BenchmarkKatakanaToHiragana-4 1000000 1597 ns/op
BenchmarkHankakuToZenkaku-4 1000000 1995 ns/op
BenchmarkZenkakuToHankaku-4 1000000 2008 ns/op
BenchmarkSmartConv-4 1000000 2063 ns/op
ok github.com/miiton/kanaconv9.450s
- MacBook Pro (15-inch, 2016)
% go test -bench .
goos: darwin
goarch: amd64
pkg: github.com/miiton/kanaconv
BenchmarkHiraganaToKatakana-8 3000000 533 ns/op
BenchmarkKatakanaToHiragana-8 3000000 519 ns/op
BenchmarkHankakuToZenkaku-8 2000000 795 ns/op
BenchmarkZenkakuToHankaku-8 2000000 709 ns/op
BenchmarkSmartConv-8 2000000 820 ns/op
PASS
ok github.com/miiton/kanaconv 11.271s