v/examples/regex/pcre.vv

module main

// NB: you need to `v install pcre` to be able to compile this example.

import pcre

fn example() {
	r := pcre.new_regex('Match everything after this: (.+)', 0) or {
		println('An error occurred!')
		return
	}

	m := r.match_str('Match everything after this: "I ❤️ VLang!"', 0, 0) or {
		println('No match!')
		return
	}

	// m.get(0) -> Match everything after this: "I ❤️ VLang!"
	// m.get(1) -> "I ❤️ VLang!"'
	// m.get(2) -> Error!
	whole_match := m.get(0) or {
		println('We matched nothing...')
		return
	}

	matched_str := m.get(1) or {
		println('We matched nothing...')
		return
	}

	println(whole_match) // Match everything after this: "I ❤️ VLang!"
	println(matched_str) // "I ❤️ VLang!"
}

fn main() {
	example()

	mut text := '[ an s. s! ]( wi4ki:something )
	[ an s. s! ]( wi4ki:something )
	[ an s. s! ](wiki:something)
	[ an s. s! ](something)dd
	d [ an s. s! ](something ) d
	[  more text ]( something ) s [ something b ](something)dd

	'

	// check the regex on https://regex101.com/r/HdYya8/1/

	regex := r'(\[[a-z\.\! ]*\]\( *\w*\:*\w* *\))*'

	r := pcre.new_regex(regex, 0) or {
		println('An error occurred!')
		return
	}

	m := r.match_str(text, 0, 0) or {
		println('No match!')
		return
	}

	whole_match1 := m.get(0) or {
		println('We matched nothing 0...')
		return
	}

	println(whole_match1)

	println(m.get_all())
}