Module `Rx_intf.Char_class`

type t = | Chars_in of string Chars_in s matches characters in s (e.g., ":digit:" matches ':') | Range of char * char Range (c1, c2) matches characters between c1 and c2 inclusive.

`\|` `Chars_in of string`	`Chars_in s` matches characters in `s` (e.g., "`:digit:`" matches ':')
`\|` `Range of char * char`	`Range (c1, c2)` matches characters between `c1` and `c2` inclusive.