package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?s)(?:\G(?!\A)|<p(?:\s[^>]*)?\sclass="(?:[^"]*\s)?c01[\s"])(?:(?!<p[\s>]).)*?\K\.(?=.*?</p>)`)
var str = `<p class="c01 c02">lorem ipsum. dolor sit. amet sed.</p>
<p class="c01 c02 c03 nnn>lorem ipsum. dolor sit. amet sed.</p>
<p class="c00 c01 c02 c03 nnn>lorem ipsum. dolor sit. amet sed.</p>
<p class="c00 c01-1 c02 c03 nnn>lorem ipsum. dolor sit. amet sed.</p>`
var substitution = "$0 #"
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/