ch.ethz.iks.slp.impl.attr.attributes.abnf Maven / Gradle / Ivy

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# Parser generator comes from: 
# http://www.parse2.com/index.shtml
#
# Grammar comes from 2608 [1] and has been completed with 4234 [2]:
# [1] http://tools.ietf.org/html/rfc2608
# [2] http://tools.ietf.org/html/rfc4234

attr-list 		= attribute / attribute "," attr-list;
attribute 		= "(" attr-tag "=" attr-val-list ")" / attr-tag;
attr-val-list 	= attr-val / attr-val "," attr-val-list;
attr-tag 		= 1*safe-tag;
attr-val 		= intval / strval / boolval / opaque;
intval 			= "-"1*DIGIT;
strval 			= 1*safe-val;
boolval 		= "true" / "false";
opaque 			= "\FF" 1*escape-val;
safe-val 		= %x20 / %x22-27 / %x2A-2B / %x2D-3B / %x3F-5B / %x5D-7D; #Any character except reserved.
safe-tag 		= %x20 / %x22-27 / %x2B    / %x2D-3B / %x3F-5B / %x5D-5E / %x60-7D; #Any character except reserved, star and bad-tag.
#reserved 		= "(" / ")" / "," / "\" / "!"  / "<" / "=" / ">" / "~" / CTL;
escape-val 		= "\" HEXDIG HEXDIG;
#bad-tag 		= CR / LF / HTAB / "_";
#star 			= "*";

##------------------------------------------------------------------------
## Taken from rfc4234
## core rules
##------------------------------------------------------------------------

#ALPHA          =  %x41-5A / %x61-7A;
#BIT            =  "0" / "1";
#CHAR           =  %x01-7F;
#CR             =  %x0D;
#CRLF           =  (CR LF) / LF;
#CTL            =  %x00-1F / %x7F;
DIGIT          =  %x30-39;
#DQUOTE         =  %x22;
HEXDIG         =  DIGIT / "A" / "B" / "C" / "D" / "E" / "F";
#HTAB           =  %x09;
#LF             =  %x0A;
#LWSP           =  *(WSP / CRLF WSP);
#OCTET          =  %x00-FF;
#SP             =  %x20;
#VCHAR          =  %x21-7E;
#WSP            =  SP / HTAB;