1 // Tests for late-specified return type.
2 // { dg-options "-std=c++0x" }
9 template<class T, class U>
10 auto add(T t, U u) -> decltype (t+u)
15 template<class T, class U>
16 decltype(T()+U()) add2(T t, U u)
21 template <class T, class U>
27 template<class T, class U>
28 auto add3(T t, U u) -> decltype (ag(t,u))
33 template<class T, class U>
34 decltype(*(T*)0+*(U*)0) add4(T t, U u)
53 auto f(T* t) -> decltype (t->f())
59 auto g(T t) -> decltype (t.f())
64 template <class T, class U>
65 auto h(T t, U u) -> decltype (t.template g<U>())
67 return t.template g<U>();
71 struct C: public A<int>::B<D>
75 template <class T, class U, class V>
76 auto k(T t, U u, V v) -> decltype (t.U::template B<V>::MEM)
78 return t.U::template B<V>::MEM;
81 // For these two examples we can elide the 'decltype' and just mangle the type.
83 auto l(T t) -> decltype (t)
88 template <class T, T u>
89 auto m(T t) -> decltype (u)
98 // { dg-final { scan-assembler "_Z3addIidEDTplsTT_sTT0_ES0_S1_" } }
100 // { dg-final { scan-assembler "_Z4add4IidEDTplsTT_sTT0_ES0_S1_" } }
101 auto i4 = add4(1, 2.0);
102 // { dg-final { scan-assembler "_Z4add2IidEDTplsRT_sRT0_ES0_S1_" } }
103 auto i2 = add2(1, 2.0);
104 // { dg-final { scan-assembler "_Z4add3IidEDTclL_Z2agEsTT_sTT0_EES0_S1_" } }
105 auto i3 = add3(1, 2.0);
106 // { dg-final { scan-assembler "_Z1fI1AIiEEDTclptsTPT_1fEES3_" } }
108 // { dg-final { scan-assembler "_Z1gI1AIiEEDTcldtsTT_1fEES2_" } }
110 // { dg-final { scan-assembler "_Z1hI1AIiEdEDTcldtsTT_1gIT0_EEES2_S3_" } }
112 // { dg-final { scan-assembler "_Z1kI1C1AIiE1DEDtdtsTT_srNT0_1BIT1_EE3MEMES4_S5_S7_" } }
113 k( C(), A<int>(), D() );
114 // { dg-final { scan-assembler "_Z1lIiET_S0_" } }
116 // { dg-final { scan-assembler "_Z1mIiLi1EET_S0_" } }