[Bug c++/29896] GDB git doesn't recognize template function name

["tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29896

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
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                 CC|                            |tromey at sourceware dot org

--- Comment #3 from Tom Tromey <tromey at sourceware dot org> ---
What happens is that the first scan (the cooked index) takes
the name from the DWARF and gets "t0<>".  The cooked index
just uses strncasecmp to find entries, so it doesn't find
this name.

Full symbol name matching, I think, is done with strncmp_iw_with_mode,
which handles a lot of weird cases and ignores the "<>":

      /* Skip template parameters in STRING1 if STRING2 does not contain
         any.  E.g.:
[...]

So, that sucks.

I'm not completely sure how to solve it.  Perhaps stripping
the template parmaeters before recording the entry in the index would
work.

One idea is to have two entries, both with and without the parameters,
but I wonder about combinatorial explosion if there are nested templates
like a<>::b<>::c<>::d<> -- since the entries record parent information.

Another idea is to change the hashing and the lookup to use
strncmp_iw_with_mode somehow, at least for C++ names.

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