Error parsing valid charset class

[mingodad]

Trying to parse a valid peg grammar with cpp-peglib I found that it doesn't accept the charset class shown bellow:

plusorless  <-  [+-]

Playgound output:

1:21 syntax error

Changing Range to the one shown bellow fix the issue:

Range <-  (Char  '-'  ! ']' Char) /  Char

Hardcoded fix in peglib.h:

g["Range"] <= cho(seq(g["Char"], chr('-'), npd(chr(']')), g["Char"]), g["Char"]);

[yhirose]

@mingodad, thank you for the feedback. I tried to make the cpp-httplib PEG parser syntax as faithful as the one described on the 2nd page in the original Bryan Ford paper, but the enhancement that you suggests looks reasonable. I'll consider to take the suggestion. Thank you.

[mingodad]

Another missing feature are some escape sequences like \v, \f, ...

Char		<- '\\' [abefnrtv'"[\]\\^]

[yhirose]

\v, \f are same as #87.