Yeah, looks like a bug in Clang to me - CC'ing Richard Smith in case this
is quick/easy/obvious to him. Here's my slightly modified test case
comparing Clang and GCC's behavior, and adding a non-member overload
situation to demonstrate that that works on both compilers:
https://godbolt.org/z/cTq06R
On Sat, Nov 3, 2018 at 3:19 PM Werner LEMBERG via cfe-users <
cfe-users@lists.llvm.org> wrote:
>
> Folks,
>
>
> below is a MWE that compiles fine with g++ but fails with clang
> (tested version 6.0.1 on a GNU/Linux box):
>
> clang-problem.cpp:19:7: error:
> no matching member function for call to 'zip'
> bex.zip <&B::fun> ();
> ~~~~^~~~~~~~~~~~~
> clang-problem.cpp:13:8: note: candidate template ignored:
> invalid explicitly-specified argument for template parameter 'mf'
> void zip () { }
> ^
>
> To my best knowledge, the code is valid C++. This means there are two
> possible corrolaries: either I'm wrong, and it is not valid C++
> according to the standard, or clang++ has a bug. Hopefully, it's the
> former.
>
> Can you point out a solution?
>
>
> Werner
>
>
> ======================================================================
>
>
> class A {
> public:
> template <void (A::*mf)()>
> void zip () { }
> void fun () { }
> };
>
> class B : public A
> {
> public:
> using A::zip; // Fails to involve A::zip in overloading resolution
> template <void (B::*mf)()>
> void zip () { }
> } bex;
>
>
> void x ()
> {
> bex.zip <&B::fun> ();
> }
>
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> cfe-users@lists.llvm.org
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>
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