Viewing file:  auto-fncast2.C (1.3 KB) -rw-r--r--
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// PR c++/103049
// P0849R8 - auto(x)
// { dg-do compile { target c++23 } }
struct X { };
X& fn ();
X&& fnr ();
void h()
{
double v[] = { 1.2, 3.4 };
+auto(v);
+auto{v};
static_assert (__is_same_as (decltype (auto(v)), double *));
static_assert (__is_same_as (decltype (auto{v}), double *));
auto a1 = fn ();
static_assert (__is_same_as (decltype (auto(fn())), decltype (a1)));
static_assert (__is_same_as (decltype (auto{fn()}), decltype (a1)));
auto a2 = fnr ();
static_assert (__is_same_as (decltype (auto(fnr())), decltype (a2)));
static_assert (__is_same_as (decltype (auto{fnr()}), decltype (a2)));
+auto(1);
new auto(1);
+auto{1};
new auto{1};
}
template<typename T>
void baz (T t, const T &tr, T &&trr)
{
+auto(t);
+auto{t};
+auto(tr);
+auto{tr};
+auto(trr);
+auto{trr};
static_assert (__is_same_as (decltype (auto(t)), T));
static_assert (__is_same_as (decltype (auto{t}), T));
static_assert (__is_same_as (decltype (auto(tr)), T));
static_assert (__is_same_as (decltype (auto{tr}), T));
static_assert (__is_same_as (decltype (auto(trr)), T));
static_assert (__is_same_as (decltype (auto{trr}), T));
}
template<typename = decltype(auto(1))>
void foo ()
{
}
template<int = auto(1)>
void bar ()
{
}
void
g()
{
foo<>();
bar<>();
int i = 42;
baz (1, i, 42);
}
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