Matching block of nested brace pairs

[Peng Yu]

Suppose I have some C++ code like the following, I want to match the
whole namespace x block.

namespace x
{
namespace y
{
....
}

}

The following webpage shows brace-matching for perl regex. But I don't
find the matchpairs module. (I'm using perl 5.10.1). Would you please
let me know if there is a way to match block of nested braces in perl?

http://dev.perl.org/perl6/rfc/145.html

 

[Charlton Wilbur]

PY> Would you please let me know if there is a way to match block of
PY> nested braces in perl?

Yes, there is. What did you find when you consulted the FAQ?

Charlton

 

[Peng Yu]

    PY> Would you please let me know if there is a way to match blockof
    PY> nested braces in perl?

Yes, there is.  What did you find when you consulted the FAQ?

http://faq.perl.org/perlfaq6.html#Can_I_use_Perl_regul

The example on this link is daunting to me. I have read perlre.

$re = qr{ ( # paren group 1
(full function)
foo
( # paren group 2
(parens)
\(
( # paren group 3
(contents of parens)
(?:
(?> [^()]+ ) # Non-parens without
backtracking
|
(?2) # Recurse to start
of paren group 2
)*
)
\)
)
)
}x;

I still don't understand it how it works. What doesn't "Recurse to
start of paren group 2"?

For my specific problem (C++ namespace), would you please show me how
to do it and explain it to me how it works? Thank you!

 

[Charlton Wilbur]

PY> The example on this link is daunting to me. I have read perlre.

PY> I still don't understand it how it works. What doesn't "Recurse
PY> to start of paren group 2"?

Do you understand what "recurse" means? Do you understand what "paren
group 2" means?

PY> For my specific problem (C++ namespace), would you please show
PY> me how to do it and explain it to me how it works? Thank you!

Frankly, no, because if I do, you'll ignore the explanation and ask
comp.lang.perl.misc the next time you have a problem to solve, and I'm
already tired of seeing you ask FAQs. You really have two options: you
can put in the work to understand what you're doing, or you can hire
someone, for money, who will write code to your specification.

Charlton

 

[Jürgen Exner]

The following webpage shows brace-matching for perl regex. But I don't
find the matchpairs module. (I'm using perl 5.10.1). Would you please
let me know if there is a way to match block of nested braces in perl?

You keep asking very basic questions and questions that are answered in
the FAQ. I _VERY_STRONGLY_ suggest you familiarize yourself with the
FAQ.

Here is the last fish for you: "perldoc -q nest":
"How do I find matching/nesting anything?"

jue