Network.Parser.Rfc2234
vcharPred
spPred
lfPred
htPred
hexdigPred
digitPred
dquotePred
ctlPred
charPred
upalphaPred
loalphaPred
alphaPred
bitPred
wsp
vchar
sp
octet
lwsp
lf
ht
hexdig
digit
dquote
ctl
crlf
cr
char
bit
upalpha
loalpha
alpha
manyN
manyNtoM