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// Tests for late-specified return type.
// { dg-options "-std=c++0x" }
auto f() -> int
{
return 0;
}
template<class T, class U>
auto add(T t, U u) -> decltype (t+u)
{
return t+u;
}
template<class T, class U>
decltype(T()+U()) add2(T t, U u)
{
return t+u;
}
template <class T, class U>
U ag (T, U)
{
return U();
}
template<class T, class U>
auto add3(T t, U u) -> decltype (ag(t,u))
{
return ag(t,u);
}
template<class T, class U>
decltype(*(T*)0+*(U*)0) add4(T t, U u)
{
return t+u;
}
template <class T>
struct A
{
T f() {}
template <class U>
T g() {}
template <class V>
struct B
{
int MEM;
};
};
template <class T>
auto f(T* t) -> decltype (t->f())
{
return t->f();
}
template <class T>
auto g(T t) -> decltype (t.f())
{
return t.f();
}
template <class T, class U>
auto h(T t, U u) -> decltype (t.template g<U>())
{
return t.template g<U>();
}
struct D { };
struct C: public A<int>::B<D>
{
};
template <class T, class U, class V>
auto k(T t, U u, V v) -> decltype (t.U::template B<V>::MEM)
{
return t.U::template B<V>::MEM;
}
// For these two examples we can elide the 'decltype' and just mangle the type.
template <class T>
auto l(T t) -> decltype (t)
{
return t;
}
template <class T, T u>
auto m(T t) -> decltype (u)
{
return t;
}
A<int> a, *p;
int main()
{
// { dg-final { scan-assembler "_Z3addIidEDTplsTT_sTT0_ES0_S1_" } }
auto i = add(1, 2.0);
// { dg-final { scan-assembler "_Z4add4IidEDTplsTT_sTT0_ES0_S1_" } }
auto i4 = add4(1, 2.0);
// { dg-final { scan-assembler "_Z4add2IidEDTplsRT_sRT0_ES0_S1_" } }
auto i2 = add2(1, 2.0);
// { dg-final { scan-assembler "_Z4add3IidEDTclL_Z2agEsTT_sTT0_EES0_S1_" } }
auto i3 = add3(1, 2.0);
// { dg-final { scan-assembler "_Z1fI1AIiEEDTclptsTPT_1fEES3_" } }
f(p);
// { dg-final { scan-assembler "_Z1gI1AIiEEDTcldtsTT_1fEES2_" } }
g(a);
// { dg-final { scan-assembler "_Z1hI1AIiEdEDTcldtsTT_1gIT0_EEES2_S3_" } }
h(a,1.0);
// { dg-final { scan-assembler "_Z1kI1C1AIiE1DEDtdtsTT_srNT0_1BIT1_EE3MEMES4_S5_S7_" } }
k( C(), A<int>(), D() );
// { dg-final { scan-assembler "_Z1lIiET_S0_" } }
l(1);
// { dg-final { scan-assembler "_Z1mIiLi1EET_S0_" } }
m<int,1>(1);
}
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