[llvm-dev] VC C++ demangler

[David Blaikie via llvm-dev]

Yeah, may well be the case - I don't /think/ LLVM quite matches the exact
syntax of the GCC demangler either (I seem to recall constants as non-type
template parameters were a bit different).

On Tue, Jun 20, 2017 at 10:36 AM Rui Ueyama <ruiu at google.com> wrote:

> On Tue, Jun 20, 2017 at 10:17 AM, Robinson, Paul <paul.robinson at sony.com>
> wrote:
>
>> Just to be clear - once LLVM has its own demangler, it should probably
>> use it on all platforms, so there'd be no worry about different behavior
>> between LLVM on Windows and LLVM elsewhere.
>>
>> But that said, it's probably still important/worthwhile to make sure it's
>> consistent with the platform demangler.
>>
>>
>>
>> Personally I would be all for a unit test program that verified against
>> the Windows API when run on Windows, and against canned output on
>> non-Windows.
>>
>
> That was my preference too, but looks like getting the exact same results
> as the Windows API is not that easy nor worthwhile when it comes to
> arbitrary formatting rules. For example, IIRC, UnDecorateSymbolName
> generates not "int const* const* x" nor "int const * const * x" but "int
> const* const * x". This is simply odd, and I'd guess we don't want to
> mimic all these corner cases. So mixing our own demangler and the Windows
> demangler can cause unnecessary churn.
>
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