package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?mi)(?=procedure A;)(procedure \w+;\s*(?:(?!procedure|begin|end;)[\s\S]|(?1))*(begin(?:(?!begin|end;)[\s\S]|(?2))*end;))`)
var str = `procedure A;
procedure B;
begin
end;
procedure C;
begin
end;
begin
if True then
begin
end;
end;
procedure C;
begin
if True then
begin
end;
end;
procedure A;
procedure B;
begin
end;
procedure C;
begin
end;
begin
if True then
begin
end;
end;
procedure C;
begin
if True then
begin
end;
end;
`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
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/