You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: xurls.go
    path of file: ./repos/darktile/vendor/mvdan.cc/xurls
    
    the code of the file until where you have to start completion: // Copyright (c) 2015, Daniel Mart√≠ <mvdan@mvdan.cc>
// See LICENSE for licensing information

// Package xurls extracts urls from plain text using regular expressions.
p
    
func StrictMatchingScheme(exp string) (*regexp.Regexp, error) {
	strictMatching := `(\b(?i)(` + exp + `)(?-i)` + pathCont + `)`
	re, err := regexp.Compile(strictMatching)
	if err != nil {
		return nil, err
	}
	re.Longest()
	return re, nil
}