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// P2564R3
// { dg-do compile { target c++20 } }
// Test unevaluated operands.
consteval int id (int i) { return i; }
constexpr int
f1 (auto i)
{
// Unevaluated operand -> don't promote.
auto p = sizeof (&id);
(void) p;
return i;
}
constexpr int
f2 (auto i)
{
// Unevaluated operand -> don't promote.
auto p = noexcept (id);
(void) p;
return i;
}
constexpr int
f3 (auto i)
{
// Unevaluated operand -> don't promote.
auto p = noexcept (id (i));
(void) p;
return i;
}
constexpr int
f4 (auto i)
{
// Unevaluated operand -> don't promote.
decltype(id) p;
(void) p;
return i;
}
constexpr int
f5 (auto i)
{
// Unevaluated operand -> don't promote.
__extension__ auto p = alignof (id (i));
(void) p;
return i;
}
constexpr int
f6 (auto i) requires requires { id (i); }
{
return i;
}
void
g (int non_const)
{
f1 (42);
f1 (non_const);
f2 (42);
f2 (non_const);
f3 (42);
f3 (non_const);
f4 (42);
f4 (non_const);
f5 (42);
f5 (non_const);
f6 (42);
f6 (non_const);
}
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