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// PR c++/71093
// { dg-do compile { target c++14 } }
constexpr int f (const int *p)
{
typedef int T;
p->~T (); // { dg-error "destroying" }
return *p;
}
constexpr int i = 0;
constexpr int j = f (&i);
template <typename T>
constexpr bool test_access() {
T x {};
x.~T();
T y = x; // { dg-error "lifetime" }
return true;
}
template <typename T>
constexpr bool test_modification() {
T x {};
x.~T();
x = T(); // { dg-error "lifetime" }
return true;
}
template <typename T>
constexpr bool test_scope() {
{
T x {};
x.~T();
} // { dg-error "destroying" }
return true;
}
template <typename T>
constexpr bool test_destroy_temp() {
T{}.~T(); // { dg-error "destroying" }
return true;
}
template <typename T>
constexpr bool test_parameter(T t) {
// note: error message occurs at point of call
t.~T();
return true;
}
template <typename T>
constexpr void test_bindings_impl(int n) {
if (n == 0) return;
T a {};
if (n == 1) return;
T b {};
}
template <typename T>
constexpr bool test_bindings() {
test_bindings_impl<T>(1);
test_bindings_impl<T>(0);
test_bindings_impl<T>(2);
return true;
}
constexpr bool i1 = test_access<int>(); // { dg-message "in .constexpr." }
constexpr bool i2 = test_modification<int>(); // { dg-message "in .constexpr." }
constexpr bool i3 = test_scope<int>(); // { dg-message "in .constexpr." }
constexpr bool i4 = test_destroy_temp<int>(); // { dg-message "in .constexpr." "" { xfail *-*-* } }
constexpr bool i5 = test_parameter(int{}); // { dg-error "destroying" }
constexpr bool i6 = test_bindings<int>();
struct Trivial { int x; };
constexpr bool t1 = test_access<Trivial>(); // { dg-message "in .constexpr." }
constexpr bool t2 = test_modification<Trivial>(); // { dg-message "in .constexpr." }
constexpr bool t3 = test_scope<Trivial>(); // { dg-message "in .constexpr." }
constexpr bool t4 = test_destroy_temp<Trivial>(); // { dg-message "in .constexpr." }
constexpr bool t5 = test_parameter(Trivial{}); // { dg-error "destroying" }
constexpr bool t6 = test_bindings<Trivial>();
#if __cplusplus >= 202002L
struct NonTrivial { int x; constexpr ~NonTrivial() {} }; // { dg-error "destroying" "" { target c++20 } }
constexpr bool n1 = test_access<NonTrivial>(); // { dg-message "in .constexpr." "" { target c++20 } }
constexpr bool n2 = test_modification<NonTrivial>(); // { dg-message "in .constexpr." "" { target c++20 } }
constexpr bool n3 = test_scope<NonTrivial>(); // { dg-message "in .constexpr." "" { target c++20 } }
constexpr bool n4 = test_destroy_temp<NonTrivial>(); // { dg-message "in .constexpr." "" { target c++20 } }
constexpr bool n5 = test_parameter(NonTrivial{}); // { dg-error "destroying" "" { target c++20 } }
constexpr bool n6 = test_bindings<NonTrivial>();
#endif
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