Escape sequences in Ocaml

Question

Is there a standard way in Ocaml to convert from (for example) a\n(a three byte string:) 0x61,0x5c,0x6eto a double byte string 0x61,0x0a:?

My Ocaml program can get strings with escaped characters, like their "unescape"?

+3

pbp Apr 17 '12 at 12:17

2 answers

If you are using OCaml 4.0.0 or later, you can use Scanf.unescaped.

Example:

# open Scanf
# Scanf.unescaped "a\\n";;
- : bytes = "a\n"      
# Scanf.unescaped "\\n\\t\\\\";;
- : bytes = "\n\t\\"

Interface: ( via OCaml docs )

val unescaped : string -> string
escape-, OCaml, . escape-, , String.escaped.
4.00.0

+1

Kevin Chen 02 . '15 4:09

pbp · Accepted Answer · 2012-04-17T12:55:40+0000

let unescape s = Scanf.sscanf ("\"" ^ s ^ "\"") "%S%!" (fun u -> u)