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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// XFAIL: with_system_cxx_lib=macosx10.12
// XFAIL: with_system_cxx_lib=macosx10.11
// XFAIL: with_system_cxx_lib=macosx10.10
// XFAIL: with_system_cxx_lib=macosx10.9
// XFAIL: with_system_cxx_lib=macosx10.7
// XFAIL: with_system_cxx_lib=macosx10.8
// <optional>
// template <class U>
// constexpr EXPLICIT optional(U&& u);
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "archetypes.hpp"
#include "test_convertible.hpp"
using std::optional;
struct ImplicitThrow
{
constexpr ImplicitThrow(int x) { if (x != -1) TEST_THROW(6);}
};
struct ExplicitThrow
{
constexpr explicit ExplicitThrow(int x) { if (x != -1) TEST_THROW(6);}
};
struct ImplicitAny {
template <class U>
constexpr ImplicitAny(U&&) {}
};
template <class To, class From>
constexpr bool implicit_conversion(optional<To>&& opt, const From& v)
{
using O = optional<To>;
static_assert(test_convertible<O, From>(), "");
static_assert(!test_convertible<O, void*>(), "");
static_assert(!test_convertible<O, From, int>(), "");
return opt && *opt == static_cast<To>(v);
}
template <class To, class Input, class Expect>
constexpr bool explicit_conversion(Input&& in, const Expect& v)
{
using O = optional<To>;
static_assert(std::is_constructible<O, Input>::value, "");
static_assert(!std::is_convertible<Input, O>::value, "");
static_assert(!std::is_constructible<O, void*>::value, "");
static_assert(!std::is_constructible<O, Input, int>::value, "");
optional<To> opt(std::forward<Input>(in));
return opt && *opt == static_cast<To>(v);
}
void test_implicit()
{
{
static_assert(implicit_conversion<long long>(42, 42), "");
}
{
static_assert(implicit_conversion<long double>(3.14, 3.14), "");
}
{
int x = 42;
optional<void* const> o(&x);
assert(*o == &x);
}
{
using T = TrivialTestTypes::TestType;
static_assert(implicit_conversion<T>(42, 42), "");
}
{
using T = TestTypes::TestType;
assert(implicit_conversion<T>(3, T(3)));
}
{
using O = optional<ImplicitAny>;
static_assert(!test_convertible<O, std::in_place_t>(), "");
static_assert(!test_convertible<O, std::in_place_t&>(), "");
static_assert(!test_convertible<O, const std::in_place_t&>(), "");
static_assert(!test_convertible<O, std::in_place_t&&>(), "");
static_assert(!test_convertible<O, const std::in_place_t&&>(), "");
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
try {
using T = ImplicitThrow;
optional<T> t = 42;
assert(false);
((void)t);
} catch (int) {
}
}
#endif
}
void test_explicit() {
{
using T = ExplicitTrivialTestTypes::TestType;
static_assert(explicit_conversion<T>(42, 42), "");
}
{
using T = ExplicitConstexprTestTypes::TestType;
static_assert(explicit_conversion<T>(42, 42), "");
static_assert(!std::is_convertible<int, T>::value, "");
}
{
using T = ExplicitTestTypes::TestType;
T::reset();
{
assert(explicit_conversion<T>(42, 42));
assert(T::alive == 0);
}
T::reset();
{
optional<T> t(42);
assert(T::alive == 1);
assert(T::value_constructed == 1);
assert(T::move_constructed == 0);
assert(T::copy_constructed == 0);
assert(t.value().value == 42);
}
assert(T::alive == 0);
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
try {
using T = ExplicitThrow;
optional<T> t(42);
assert(false);
} catch (int) {
}
}
#endif
}
int main() {
test_implicit();
test_explicit();
}
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