[Issue 12367] std.regex: Recognize (?# ... ) comment syntax

2016-04-11 Thread via Digitalmars-d-bugs 
https://issues.dlang.org/show_bug.cgi?id=12367

--- Comment #2 from github-bugzi...@puremagic.com ---
Commits pushed to master at https://github.com/D-Programming-Language/phobos

https://github.com/D-Programming-Language/phobos/commit/12c7d680449dde70fdb5f35c997d6940e4298a81
Fix issue 12367 - std.regex: Recognize (?# ... ) comment syntax

https://github.com/D-Programming-Language/phobos/commit/9f256889edd5069fe6d3e6babb22c406933dbd2c
Add documnetation and changelog for issue 12367

https://github.com/D-Programming-Language/phobos/commit/b4f0478434ba3c44306f9cfaf74d250e481fca32
Merge pull request #4159 from DmitryOlshansky/issue-12367

Fix issue 12367 - std.regex: Recognize (?# ... ) comment syntax

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[Issue 12367] std.regex: Recognize (?# ... ) comment syntax

2014-04-23 Thread via Digitalmars-d-bugs 
https://issues.dlang.org/show_bug.cgi?id=12367

Dmitry Olshansky dmitry.o...@gmail.com changed:

   What|Removed |Added

 CC||dmitry.o...@gmail.com
   Assignee|nob...@puremagic.com|dmitry.o...@gmail.com

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[Issue 12367] std.regex: Recognize (?# ... ) comment syntax

2014-03-14 Thread d-bugmail 
https://d.puremagic.com/issues/show_bug.cgi?id=12367


bearophile_h...@eml.cc changed:

   What|Removed |Added

 CC||bearophile_h...@eml.cc


--- Comment #1 from bearophile_h...@eml.cc 2014-03-14 17:21:08 PDT ---
(In reply to comment #0)
 A comment syntax would be handy for particularly long expressions.
 
 This syntax seems to be already supported by several existing engines:
 http://www.regular-expressions.info/freespacing.html#parenscomment

While it's good to have a basic (?# ... ) comment syntax, I much prefer the
Python verbose regex syntax, because it allows me to lay down regexes as little
programs, with logically indented lines and #-style comments:

http://docs.python.org/2/library/re.html

http://www.diveintopython.net/regular_expressions/verbose.html


 pattern = 
^   # beginning of string
M{0,4}  # thousands - 0 to 4 M's
(CM|CD|D?C{0,3})# hundreds - 900 (CM), 400 (CD), 0-300 (0 to 3 C's),
#or 500-800 (D, followed by 0 to 3 C's)
(XC|XL|L?X{0,3})# tens - 90 (XC), 40 (XL), 0-30 (0 to 3 X's),
#or 50-80 (L, followed by 0 to 3 X's)
(IX|IV|V?I{0,3})# ones - 9 (IX), 4 (IV), 0-3 (0 to 3 I's),
#or 5-8 (V, followed by 0 to 3 I's)
$   # end of string


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