package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)\b
(
(?<abrev>(?:[A-Z]\.)+)
|(?<roman>M{0,4}(?:CM|CD|D?C{0,3})(?:XC|XL|L?X{0,3})(?:IX|IV|V?I{0,3}))
|(?<prep>(?i)d?[aoe]s?(?-i))
|(?<first>\w)(?<rest>\w+)
)
\b`)
var str = `alto dO cruzeiro
joão paulo II
N.S. aparecida
N.S. DAS GRAÇAS`
var substitution = "${abrev}${roman}\L${prep}\E\U${first}\L${rest}"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/