[Bug c++/16843] GDB relies on the mangled name of a subprogram to be a prefix of the enclosing class name

["dblaikie at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16843

--- Comment #6 from David Blaikie <dblaikie at gmail dot com> ---
(In reply to Tom Tromey from comment #5)
> There are some differences between the canonicalizer
> and the demangler, see bug #17762.  Is that what is 
> meant here?

Yeah, they're certainly similar bugs - I don't know enough about the GDB
implementation details to know if they're totally duplicate/identical root
cause.

One difference (that may be superficial) is that this bug is about type names,
that bug is about function names, at least partially.

But, yeah, that char literals aren't canonicalized where other types like `long
int`/`long` is the/a bug somewhere. There's probably other canonicalization
issues for interesting literals - I think I came across a few in Clang.

(lambdas are the worst - I've tried to have some discussion with the DWARF
Committee about how we should render templates instantiated with lambdas in
such a way that they can be canonicalized between compilations and between
compilers... )

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