JonasToth added inline comments.
================
Comment at: test/clang-tidy/hicpp-exception-baseclass.cpp:191
+void templated_thrower() { throw T{}(); }
+// CHECK-MESSAGES: [[@LINE-1]]:34: warning: throwing an exception whose type
'int' is not derived from 'std::exception'
+
----------------
JonasToth wrote:
> alexfh wrote:
> > hokein wrote:
> > > I think giving message on the template function here is confusing to
> > > users even it gets instantiated somewhere in this TU -- because users
> > > have to find the location that triggers the template instantiation.
> > >
> > > Maybe
> > > 1) Add a note which gives the instantiation location to the message, or
> > > 2) ignore template case (some clang-tidy checks do this)
> > In this particular case it seems to be useful to get warnings from template
> > instantiations. But the message will indeed be confusing.
> >
> > Ideally, the message should have "in instantiation of xxx requested here"
> > notes attached, as clang warnings do. But this is not working
> > automatically, and it's implemented in Sema
> > (`Sema::PrintInstantiationStack()` in lib/Sema/SemaTemplateInstantiate.cpp).
> >
> > I wonder whether it's feasible to produce similar notes after Sema is dead?
> > Maybe not the whole instantiation stack, but at least it should be possible
> > to figure out that the enclosing function is a template instantiation or is
> > a member function of an type that is an instantiation of a template. That
> > would be useful for other checks as well.
> It should be possible to figure out, that the type comes from template
> instantiation and that information could be added to the warning.
>
> I will take a look at Sema and think about something like this. Unfortunatly
> i dont have a lot of time :/
I did look further into the issue, i think it is non-trivial.
The newly added case is not a templated exception perse, but there is a
exception-factory, which is templated, that creates a normal exception.
I did add another note for template instantiations, but i could not figure out
a way to give better diagnostics for the new use-case.
Repository:
rCTE Clang Tools Extra
https://reviews.llvm.org/D48714
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