Luego de mucho trabajar ya dimos con el resultado de este dilema que tantos lectores de nuestro espacio han presentado. Si tienes algún detalle que compartir no dudes en compartir tu conocimiento.
Solución:
Puede ver uno para Perl regexp (se muestra un poco más en detalle aquí, según lo publicado por edg)
Para publicarlos en el sitio:
CMPT 384 Lecture Notes Robert D. Cameron 29 de noviembre – 1 de diciembre de 1999
BNF Grammar of Regular Expressions
Following the precedence rules given previously, a BNF grammar for Perl-style regular expressions can be constructed as follows.
::= |
::= "|"
::= |
::=
::= | |
::= "*"
::= "+"
::= | | | |
::= "(" ")"
::= "."
::= "$"
::= any non metacharacter | "" metacharacter
::= |
::= "[" "]"
::= "[^" "]"
::= |
::= |
::= "-"
a través de VonC.
— Knud van Eeden — 21 de octubre de 2003 – 03:22 am ——————–
PERL: Buscar / Reemplazar: Expresión regular: Backus Naur Forma: ¿Cuál es el BNF posible para una expresión regular?
expression = term
term | expression
term = factor
factor term
factor = atom
atom metacharacter
atom = character
.
( expression )
[ characterclass ]
[ ^ characterclass ]
min
min ,
min , max
characterclass = characterrange
characterrange characterclass
characterrange = begincharacter
begincharacter - endcharacter
begincharacter = character
endcharacter = character
character =
anycharacterexceptmetacharacters
anycharacterexceptspecialcharacters
metacharacter = ?
* =0 or more, greedy
*? =0 or more, non-greedy
+ =1 or more, greedy
+? =1 or more, non-greedy
^ =begin of line character
$ =end of line character
$` =the characters to the left of the match
$' =the characters to the right of the match
$& =the characters that are matched
t =tab character
n =newline character
r =carriage return character
f =form feed character
cX =control character CTRL-X
N =the characters in Nth tag (if on match side)
$N=the characters in Nth tag (if not on match side)
NNN =octal code for character NNN
b =match a 'word' boundary
B =match not a 'word' boundary
d =a digit, [0-9]
D =not a digit, [^0-9]
s =whitespace, [ tnrf]
S =not a whitespace, [^ tnrf]
w ='word' character, [a-zA-Z0-9_]
W =not a 'word' character, [^a-zA-Z0-9_]
Q =put a quote (de-meta) on characters, until E
U =change characters to uppercase, until E
L =change characters to uppercase, until E
min = integer
max = integer
integer = digit
digit integer
anycharacter = ! " # $ % & ' ( ) * + , - . / :
; < = > ? @ [ ] ^ _ ` ~
0 1 2 3 4 5 6 7 8 9
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
a b c d e f g h i j k l m n o p q r s t u v w x y z
---
[book: see also: Bucknall, Julian - the Tomes of Delphi: Algorithms
and Datastructures - p. 37 - 'Using regular expressions' -
http://www.amazon.com/exec/obidos/tg/detail/-
/1556227361/qid=1065748783/sr=1-1/ref=sr_1_1/002-0122962-7851254?
v=glance&s=books]
---
---
Internet: see also:
---
Compiler: Grammar: Expression: Regular: Which grammar defines set of
all regular expressions? [BNF]
http://www.faqts.com/knowledge_base/view.phtml/aid/25950/fid/1263
---
Perl Regular Expression: Quick Reference 1.05
http://www.erudil.com/preqr.pdf
---
Top: Computers: Programming: Languages: Regular Expressions: Perl
http://dmoz.org/Computers/Programming/Languages/Regular_Expressions/Per
l/
---
TSE: Search/Replace:Regular Expression:Backus Naur Form:What is
possible BNF for regular expression?
http://www.faqts.com/knowledge_base/view.phtml/aid/25714/fid/1236
---
Delphi: Search: Regular expression: Create: How to create a regular
expression parser in Delphi?
http://www.faqts.com/knowledge_base/view.phtml/aid/25645/fid/175
---
Delphi: Search: Regular expression: How to add regular expression
searching to Delphi? [Systools]
http://www.faqts.com/knowledge_base/view.phtml/aid/25295/fid/175
----------------------------------------------------------------------
a través de Ed Guinness.
http://web.archive.org/web/20090129224504/http://faqts.com/knowledge_base/view.phtml/aid/25718/fid/200
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