[C++ PATCH] Add test for c++/72845

[Jakub Jelinek]

On Sat, Jun 08, 2019 at 08:48:43AM -0400, Marek Polacek wrote:
> This was crashing because our handling of friend decls with noexcept-specifiers
> was broken.  Fixed by fairly recent r270005.
> 
> Tested x86_64-linux, applying to trunk.
> 
> 2019-06-08  Marek Polacek  <polacek@redhat.com>
> 
> 	PR c++/72845.patch

s/\.patch//

> 	* g++.dg/cpp0x/noexcept41.C: New test.
> 
> diff --git gcc/testsuite/g++.dg/cpp0x/noexcept41.C gcc/testsuite/g++.dg/cpp0x/noexcept41.C
> new file mode 100644
> index 00000000000..4cd3d8d7854
> --- /dev/null
> +++ gcc/testsuite/g++.dg/cpp0x/noexcept41.C
> @@ -0,0 +1,12 @@
> +// PR c++/72845
> +// { dg-do compile { target c++11 } }
> +
> +template <typename> struct g { static const int h = 0; };
> +template <typename i> void declval() { static_assert(!g<i>::h,""); }
> +template <typename> struct a {
> +  template <typename d, typename c>
> +  friend auto f(d &&, c &&) noexcept(declval<c>) -> decltype(declval<c>); // { dg-error "different exception" }
> +};
> +template <typename d, typename c> auto f(d &&, c &&) -> decltype(declval<c>);
> +struct e {};
> +static_assert((e{}, declval<a<int>>),""); // { dg-error "no context to resolve type" }

	Jakub