swuecho/test_regex_in_ocaml_lexer

Test Ocaml Lexer Regex

usage

change the regex pattern and run make. test.exe will output the matchs in data.txt

{ 
open Lexing    
}

let regex = ['0'-'9']+ (* <---  change the regex here)

rule read = parse
| regex { Lexing.lexeme lexbuf |> print_endline; read lexbuf }
| _  {  read lexbuf }
| eof { () }

demo

➜  test_regex_in_ocaml_lexer git:(master) make
jbuilder build test.exe
./_build/default/test.exe  data.txt
123
5
6
4