Re: [Boost-users] [Xpressive] Problem with more than 49 named captures

Subject: Re: [Boost-users] [Xpressive] Problem with more than 49 named captures
From: Eric Niebler (eniebler_at_[hidden])
Date: 2013-04-23 16:11:25

On 13-04-21 05:23 PM, michael.donnerer_at_[hidden] wrote:
> Hi all,
> 
> I am having trouble getting more than 49 named captures to work with boost xpressive 1.49.0. I extended the default mark_tag  like so:
> 
> boost::xpressive::mark_tag s10(10);
> boost::xpressive::mark_tag s11(11);
> boost::xpressive::mark_tag s12(12);
> …
> boost::xpressive::mark_tag s48(48);
> boost::xpressive::mark_tag s49(49);
> 
> together with a regular expression that uses these named captures:
> 
> (skip rather long expression)… (s49= +(boost::xpressive::set[boost::xpressive::range('0','9')|'-']))

Whoa.

> This works as long as I stick to only using up to s49, as soon as I start using s50 the regular expression no longer seems to match. Is there anything obvious I am missing before I start digging deeper?

It's not a known problem. I guess it's pointless to ask for a *small*
repro. ;-) Some self-contained code demonstrating the problem would be a
help.

-- 
Eric Niebler
Boost.org