Various incorrectly demangled symbols

[RootCubed]

I came across a few symbols which weren't being demangled correctly by this tool.

• @248@__dt__11SndAudioMgrFv: fails to demangle, should be non-virtual thunk to SndAudioMgr::~SndAudioMgr().
• @8@4@f__2C1Fv: fails to demangle, should be virtual thunk to C1::f()
• ptm__FM3Clsi: fails to demangle, should be ptm(int Cls::*).
  Yeah, apparently PTMs without the F are a thing.
• f__Fr: fails to demangle, should be f(long double).
• mDoExt_J3DModel__create__FP12J3DModelDataUlUl: fails to demangle, should be mDoExt_J3DModel__create(J3DModelData*, unsigned long, unsigned long).
  For this one, the strategy I used here was to look for the pattern __[CFQ0123456789] to find the true delimiter between method name and the rest of the symbol, but of course that could still fail. I'm not sure if there's an easy rule to always find the correct delimiter...
• @LOCAL@drawQuad__20dDrawShadowProjMap_cFv@c_scale@3: fails to demangle, should be dDrawShadowProjMap_c::drawQuad()::c_scale
• @STRING@__ct__19MarioLauncherLayoutFv: fails to demangle, should be MarioLauncherLayout::MarioLauncherLayout()::string literal (note that this can also have an @<number> at the end, such as @STRING@init__19MarioLauncherLayoutFRC12JMapInfoIter@1)

And a bonus symbol, if you're up for the challenge:
__opM5ClassFPCvPCv_M5ClassFPCvPCv_PA4_f__5ClassCFv, should demangle to Class::operator float (* (Class::* (Class::*)() const)() const) [4]() const (...or at least according to c++filt after compiling with g++. This isn't a valid C++ declaration, typedefs are required for this I believe)

I can provide source samples for replicating these symbols, if you need any.

[RootCubed]

Some additional symbols that fail:

@8@test__1TFv@@13MyTemplate<i>
@4@test__14MyTemplate2<i>Fv@@14MyTemplate1<i>
@4@test__1TFv@@14MyTemplate2<i>
@8@test__1TFM15MyTemplate1<Cc>FPCvPv_v@@15MyTemplate1<Cc>
@STRING@test__1TFv@@15MyTemplate1<Cc>__1TFv
@STRING@test__1TFM15MyTemplate1<Cc>FPCvPv_v@@15MyTemplate1<Cc>__1TFM15MyTemplate1<Cc>FPCvPv_v@0
test2__FOi

The expected demangled symbols are:

covariant return thunk to T::test()
covariant return thunk to MyTemplate2<int>::test()
covariant return thunk to T::test()
covariant return thunk to T::test(void (MyTemplate1<char const>::*)())
covariant return thunk to T::test()::string literal
covariant return thunk to T::test(void (MyTemplate1<char const>::*)())::string literal
test2(int&&)

See https://gist.github.com/RootCubed/c2753da1722c2b683f16f37bcb89c8af for code to generate these.