[Patch] Reimplment regex matcher using DFS

[Paolo Carlini]

Hi,

On 07/23/2013 03:07 PM, Tim Shen wrote:
> At last, two bug reports(libstdc++/53622 and libstdc++/57173) said
> that there're regex grouping problems. It's relatively simple fix it
> in the DFS approach, and I added them to the testsuite. Shall I write
> PR in the ChangeLog? What does PR stand for?
PR stands for Problem Report. Traditionally adding this kind of header 
to the ChangeLog entry triggered a script on the machine running 
Subversion which sent a message to Bugzilla, which added the commit log 
to the Audit Trail of the corresponding bug report. Nice. Unfortunately, 
the thing doesn't work now (apparently we need another Google Summer of 
Code person for it ;) but I don't see why we shouldn't keep on 
decorating the ChangeLog entry like this, in this specific way instead 
of another. The general idea is that if a commit is fixing a bug, that 
should be clear in the ChangeLog and I think it makes a lot of sense. Of 
course, if the commit does *much* more than fixing a bug, it's debatable 
whether the header really makes sense, we could as well only write the 
bug number in a comment inside the testcase, or use it as the name 
itself of the testcase (or both).

Paolo.