Re: Idea about recurse pattern matching (%r)

[Xavier Wang <weasley.wx@...>]

makes subpattern support capture may complicate. so I don't plan to support it.

the issue of using braces is that, it breaks Lua's compatible. the {}
is not magic-char before, but it is now.

%r is a unused "magic" char, so we don't worry about compatibility.

2012/11/7 Egor Skriptunoff <egor.skriptunoff@gmail.com>:
> On 11/6/12, Xavier Wang <weasley.wx@gmail.com> wrote:
>> now Lua don't support ?,*,+,- on a so-called sub-pattern, but from the
>> source, to add this support is easy: we can add a special %r (means
>> recurse) modifier, so as:
>> ("catcatcat"):match "%r(cat)+"
>> returns
>> catcatcat
>> the idea is call match repeatly with sub-pattern on subject
>
> I like the idea of using subpatterns in patterns.
> Would it be more convenient to use curly braces instead of %r()?
> I also want to get captures from any subpattern.
>
> ("Abracadabra"):match "({([Aa])bra{ca()d}?}+)"
> returns
> Abracadabra     A     7     a
>



-- 
regards,
Xavier Wang.