Named backreferences with Oniguruma

ruby-talk
1

Hi all,

Ruby 1.8.4
Oniguruma 2.5.6

I'm trying to figure out how to get at named backreferences with
Oniguruma, but I'm having some problems figuring it out. Here's the
interface I would *like* to have:

# pseudo.rb
str = "hello world"
reg = /^(?<first>\w+?)\s(?<last>\w+)$/

match = reg.match(str)

first = match[:first]
last = match[:last]

But this doesn't work - I mean, the regex works, but the way I'm trying
to get at the backreferences does not. Nor does there appear to be
anything like Python's MatchData#groupdict() method (which returns a
hash).

How do I get at the named backreferences from the MatchData object? Is
there a way?

Thanks,

Dan

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2

reg = /^(?<first>\w+?)\s(?<last>\w+)$/

moulon% cat b.rb
#!/usr/bin/ruby
str = "hello world"
reg = /^(?<first>\w+?)\s(?<last>\w+)$/

match = reg.match(str)

first = match[:first]
last = match[:last]

p first,last
moulon%

moulon% ruby -v b.rb
ruby 1.9.0 (2006-07-14) [i686-linux]
"hello"
"world"
moulon%

moulon% grep ONIGURUMA_VERSION ruby/oniguruma.h
#define ONIGURUMA_VERSION_MAJOR 4
#define ONIGURUMA_VERSION_MINOR 0
#define ONIGURUMA_VERSION_TEENY 3
moulon%

Guy Decoux

3

Hi,

At Thu, 27 Jul 2006 22:11:02 +0900,
Berger, Daniel wrote in [ruby-talk:204263]:

Ruby 1.8.4
Oniguruma 2.5.6

Not 1.9? That combination isn't supported officially.

I'm trying to figure out how to get at named backreferences with
Oniguruma, but I'm having some problems figuring it out. Here's the
interface I would *like* to have:

MatchData# in 1.8 doesn't take symbols.

···

--
Nobu Nakada

4

nobu@ruby-lang.org wrote:

Hi,

At Thu, 27 Jul 2006 22:11:02 +0900,
Berger, Daniel wrote in [ruby-talk:204263]:

Ruby 1.8.4
Oniguruma 2.5.6

Not 1.9? That combination isn't supported officially.

Oh, I didn't know that.

I'm trying to figure out how to get at named backreferences with
Oniguruma, but I'm having some problems figuring it out. Here's the
interface I would *like* to have:

MatchData# in 1.8 doesn't take symbols.

Couldn't it be added? I mean, it's a custom re.c anyway, isn't it?

Thanks,

Dan

This communication is the property of Qwest and may contain confidential or
privileged information. Unauthorized use of this communication is strictly prohibited and may be unlawful. If you have received this communication in error, please immediately notify the sender by reply e-mail and destroy all copies of the communication and any attachments.

5

Hi,

At Thu, 27 Jul 2006 22:35:18 +0900,
Daniel Berger wrote in [ruby-talk:204267]:

>> I'm trying to figure out how to get at named backreferences with
>> Oniguruma, but I'm having some problems figuring it out. Here's the
>> interface I would *like* to have:
>
> MatchData# in 1.8 doesn't take symbols.
>

Couldn't it be added? I mean, it's a custom re.c anyway, isn't it?

To which? Oniguruma doesn't contain the patch for 1.8?

···

--
Nobu Nakada