1 // PR c++/98545
2 // { dg-do compile { target c++11 } }
3 // { dg-options "-Wabi=14" }
4
5 class a {
6 public:
7 a();
8 template <typename b> a(b);
9 };
10 template <class = double> using c = a;
11 class f {
12 protected:
13 template <class d, class e> void operator()(d, double, e);
14 };
15 class i : f {
16 public:
17 template <class... g>
18 [[gnu::used]] auto h(g...) -> decltype(operator()(g()...)) {} // { dg-warning "mangled name" }
19 // { dg-final { scan-assembler "_ZN1i1hIJ1adS1_EEEDTcldtdefpTonclspcvT__EEEDpS2_" } }
20 };
21 template <class> class C {
22 public:
23 template <class j> C(j);
24 i k() const;
operator()25 int operator()() {
26 int l = 10;
27 c<> m, n;
28 operator()(m, l, n);
29 return 0;
30 }
31 int operator()(c<> &, c<> const &, c<> const &) const;
k(d m,double gamma,e o)32 template <class d, class e> void k(d m, double gamma, e o) const {
33 k().h(m, gamma, o);
34 }
35 };
operator()36 template <class r> int C<r>::operator()(c<> &, c<> const &, c<> const &) const {
37 [&](c<> m, double gamma, c<> o) { k(m, gamma, o); };
38 return 0;
39 }
40 c<> p = C<double>(p)();
41