ragel_builtin_machines

There are several built-in machines available for use. They are all two state machines for the purpose of matching common classes of characters. They are:

– any     – Any character in the alphabet.
– ascii   – Ascii characters. 0..127
– extend  – Ascii extended characters. This is the range -128..127 for signed alphabets and the range 0..255 for unsigned alphabets.
– alpha   – Alphabetic characters. [A-Za-z]
– digit   – Digits. [0-9]
– alnum   – Alpha numerics. [0-9A-Za-z]
– lower   – Lowercase characters. [a-z]
– upper   – Uppercase characters. [A-Z]
– xdigit  – Hexadecimal digits. [0-9A-Fa-f]
– cntrl   – Control characters. 0..31
– graph   – Graphical characters. [!-˜]
– print   – Printable characters. [ -˜]
– punct   – Punctuation. Graphical characters that are not alphanumerics. [!-/:-@[-‘{-˜]
– space   – Whitespace. [\t\v\f\n\r ]
– zlen    – Zero length string. ""
– empty   – Empty set. Matches nothing. ˆany