Copyright	This file is part of the package addy. It is subject to the license terms in the LICENSE file found in the top-level directory of this distribution and at: https://code.devalot.com/open/addy No part of this package including this file may be copied modified propagated or distributed except according to the terms contained in the LICENSE file.
License	BSD-2-Clause
Safe Haskell	None
Language	Haskell2010

Addy.Internal.Char

Description

Internal functions representing character classes in email addresses.

Obsolete characters are only supported in Lenient mode and are filtered out after parsing.

Synopsis

Documentation

utf8NonAscii :: Char -> Bool Source #

Is a character in the UTF8-non-ascii class from RFC 6532?

Since: 0.1.0.0

obsNoWsCtl :: Char -> Bool Source #

Obsolete control characters.

obs-NO-WS-CTL   =   %d1-8 /            ; US-ASCII control
                    %d11 /             ;  characters that do not
                    %d12 /             ;  include the carriage
                    %d14-31 /          ;  return, line feed, and
                    %d127              ;  white space characters

Since: 0.1.0.0

wsp :: Char -> Bool Source #

Whitepace.

Since: 0.1.0.0

vchar :: Char -> Bool Source #

RFC 5234: Visible character.

VCHAR          =  %x21-7E
                       ; visible (printing) characters

RFC 6532 §3.2

VCHAR   =/  UTF8-non-ascii

Since: 0.1.0.0

atext :: Char -> Bool Source #

RFC 5322 §3.2.3

atext =   ALPHA / DIGIT /    ; Printable US-ASCII
          "!" / "#" /        ;  characters not including
          "$" / "%" /        ;  specials.  Used for atoms.
          "&" / "'" /
          "*" / "+" /
          "-" / "/" /
          "=" / "?" /
          "^" / "_" /
          "`" / "{" /
          "|" / "}" /
          "~"

RFC 6532 §3.2

atext =/  UTF8-non-ascii

Since: 0.1.0.0

dtext :: Char -> Bool Source #

RFC 5322 dtext.

dtext           =   %d33-90 /          ; Printable US-ASCII
                    %d94-126 /         ;  characters not including
                    obs-dtext          ;  "[", "]", or "\"
obs-dtext       =   obs-NO-WS-CTL / quoted-pair

RFC 6532 §3.2

dtext   =/  UTF8-non-ascii

Since: 0.1.0.0

ctext :: Char -> Bool Source #

RFC 5322 ctext.

ctext           =   %d33-39 /          ; Printable US-ASCII
                    %d42-91 /          ;  characters not including
                    %d93-126 /         ;  "(", ")", or "\"
                    obs-ctext

obs-ctext       =   obs-NO-WS-CTL

RFC 6532 §3.2

ctext   =/  UTF8-non-ascii

Since: 0.1.0.0

ctextObs :: Char -> Bool Source #

Obsolete ctext.

obs-ctext = obs-NO-WS-CTL

Since: 0.1.0.0

qtext :: Char -> Bool Source #

Characters that can appear in a quoted string.

RFC 5322 §3.2.4:

qtext =   %d33 /             ; Printable US-ASCII
          %d35-91 /          ;  characters not including
          %d93-126 /         ;  "\" or the quote character
          obs-qtext

RFC 6532 §3.2:

qtext =/ UTF8-non-ascii

Since: 0.1.0.0

qtextObs :: Char -> Bool Source #

Obsolete qtext.

obs-qtext = obs-NO-WS-CTL

Since: 0.1.0.0

quotedPair :: Char -> Bool Source #

Characters that can follow a backslash.

quoted-pair     =   ("\" (VCHAR / WSP)) / obs-qp

Since: 0.1.0.0

quotedPairObs :: Char -> Bool Source #

Obsolete characters that can be escaped with a backslash.

obs-qp          =   "\" (%d0 / obs-NO-WS-CTL / LF / CR)

Since: 0.1.0.0