(Changed in version 2.9.0) The p0 call-by-name arguments is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
(Changed in version 2.10.0) stringLiteral allows escaping single and double quotes, but not forward slashes any longer.
(Since version 2.10.0) lastNoSuccess was not thread-safe and will be removed in 2.11.0
(Since version 2.10.0) lastNoSuccess was not thread-safe and will be removed in 2.11.0