sabnf文件注释

;********************************************************************
;  APG - an ABNF Parser Generator
;  Copyright (C) 2011 Lowell D. Thomas, all rights reserved
;
;    author: Lowell D. Thomas
;            [email protected]
;            http://www.coasttocoastresearch.com
;
;   purpose: ABNF for SABNF
;
;*********************************************************************
; symbol alphabet is ASCII
; code points: 9, 10, 13, 32-126
;
File          = *(BlankLine/Rule/RuleError)
BlankLine     = *sp LineEnd
Rule          = NameDef owsp (IncAlt/DefinedAs) owsp Alternation owsp LineEnd
RuleError     = *fsp LineEnd
Alternation   = Concatenation *(AltOp Concatenation)
Concatenation = owsp Repetition *(CatOp Repetition)
Repetition    = Repeat / Predicate / Element
Repeat        = Rep Element
Predicate     = (AndOp / NotOp) Element ;(&/!)
Rep           = (rep-min StarOp rep-max) / ;->3*4
                (rep-min StarOp)         / ;->5*
                (StarOp rep-max)         / ;->*7
                 StarOp                  / ;->*
                 rep-min-max
Element       = TrgOp   / ;->%d03-78
                TbsOp   / ;->%093.56
                TlsOp   / ;->  ""
                TcsOp   / ;-> ''
                UdtOp   / ;u_/e_
                RnmOp   / ;alphanum
                Group   / ;()
                Option  / ;[]
                ProsVal ;<>
Group         = %d40 owsp  Alternation owsp %d41 ;()
Option        = %d91 owsp Alternation owsp %d93 ;[]
ProsVal       = %d60 *(%d32-61/%d63-127/%d9) %d62 ;<>

NameDef       = alphanum
DefinedAs     = %d61 ;=
IncAlt        = %d61.47 ;=/
RnmOp         = alphanum
UdtOp         = (%d117.95/%d101.95) alphanum ;u_/e_
AltOp         = owsp %d47 ;something like space, add /
CatOp         = wsp
StarOp        = %d42 ;*
AndOp         = %d38 ;&
NotOp         = %d33 ;!
TrgOp         = %d37 TrgRange ;->%d03-78
TbsOp         = %d37 TbsString ;->%093.56
TlsOp         = %d34 *(%d32-33/%d35-127/%d9/%x4e00-9fbf) %d34 ;" * remove 34  ->  ""
TcsOp         = %d39 *(%d32-38/%d40-127/%d9/%x4e00-9fbf) %d39 ;' * remove 39 -> ''

rep-min       = 1*(%d48-57) ;48-57 represent digit 0-9
rep-min-max   = 1*(%d48-57) ;0-9
rep-max       = 1*(%d48-57) ;0-9
TrgRange      = (Dec dnum %d45 dnum) / (Hex xnum %d45 xnum) / (Bin bnum %d45 bnum) ;-
TbsString     = (Dec dnum *(%d46 dnum)) / (Hex xnum *(%d46 xnum)) / (Bin bnum *(%d46 bnum)) ;.
Dec           = (%d68/%d100) ;D/d
Hex           = (%d88/%d120) ;X/x
Bin           = (%d66/%d98) ;B/b
dnum          = 1*(%d48-57) ;0-9
bnum          = 1*%d48-49 ;0-1
xnum          = 1*(%d48-57 / %d65-70 / %d97-102) ;0-9/A-F/a-f

; Basics
alphanum      = (%d97-122/%d65-90) *(%d97-122/%d65-90/%d48-57/%d45) ;(a-z/A-Z) *(a-z/A-Z/0-9/-)
sp            = %d32    / ;space
                %d9     / ;tab
                comment
fsp           = %d32    / ;new line
                %d9     / ;tab
                comment /
                LineContinue
owsp          = *fsp
wsp           = 1*fsp
comment       = %d59 *(%d32-127 / %d9) ; ;*(all/tab)
LineEnd       = %d13.10 / %d10 /%d13 ;enter.newline
LineContinue  = LineEnd (%d32/%d9)