[RFA] testsuite/gdb.c++/cplusfuncs.{exp,cc}: work with either g++ demangler

[Michael Snyder]

Michael Elizabeth Chastain wrote:
> 
> This is Sunday Sourceware patch #2, revision 2.
> 
> Changes since revision 1:
>   - Change wording of ChangeLog with respect to gdb/19.
>   - Change one more "char *" to "$dm_type_char_star".
> 
> gdb has two g++ demanglers.  Currently, this test script works okay on
> the v2 demangler, but gives 83 FAILs with the v3 demangler.  This patch
> enhances testsuite/gdb.c++/cplusfuncs.{cc,exp} to work with either
> demangler.
> 
> The bulk of the change is handling formatting differences:
> 
>   old demangler         new demangler
>   --- ---------         --- ---------
>   "operator, "          "operator,"
>   "char *"              "char*"
>   "int *"               "int*"
>   "long *"              "long*"
>   "void *"              "void*"
>   "foo &"               "foo&"
>   "unsigned int"        "unsigned"
>   "void"                ""

Michael, 
I'm curious why you didn't simply write separate regular expressions,
one to recognize the new demangler style and one to recognize the old,
rather than add all this new mechanics.  I'm concerned about the tcl 
scripts becoming complicated and difficult to maintain.

Please don't get me wrong -- I very much appreciate both the work
that you're investing and the fact that you're championing this
cause.