//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // UNSUPPORTED: c++98, c++03, c++11, c++14 // XFAIL: dylib-has-no-bad_optional_access && !libcpp-no-exceptions // <optional> // constexpr optional(const T& v); #include <optional> #include <type_traits> #include <cassert> #include "test_macros.h" #include "archetypes.h" using std::optional; int main(int, char**) { { typedef int T; constexpr T t(5); constexpr optional<T> opt(t); static_assert(static_cast<bool>(opt) == true, ""); static_assert(*opt == 5, ""); struct test_constexpr_ctor : public optional<T> { constexpr test_constexpr_ctor(const T&) {} }; } { typedef double T; constexpr T t(3); constexpr optional<T> opt(t); static_assert(static_cast<bool>(opt) == true, ""); static_assert(*opt == 3, ""); struct test_constexpr_ctor : public optional<T> { constexpr test_constexpr_ctor(const T&) {} }; } { const int x = 42; optional<const int> o(x); assert(*o == x); } { typedef TestTypes::TestType T; T::reset(); const T t(3); optional<T> opt = t; assert(T::alive == 2); assert(T::copy_constructed == 1); assert(static_cast<bool>(opt) == true); assert(opt.value().value == 3); } { typedef ExplicitTestTypes::TestType T; static_assert(!std::is_convertible<T const&, optional<T>>::value, ""); T::reset(); const T t(3); optional<T> opt(t); assert(T::alive == 2); assert(T::copy_constructed == 1); assert(static_cast<bool>(opt) == true); assert(opt.value().value == 3); } { typedef ConstexprTestTypes::TestType T; constexpr T t(3); constexpr optional<T> opt = {t}; static_assert(static_cast<bool>(opt) == true, ""); static_assert(opt.value().value == 3, ""); struct test_constexpr_ctor : public optional<T> { constexpr test_constexpr_ctor(const T&) {} }; } { typedef ExplicitConstexprTestTypes::TestType T; static_assert(!std::is_convertible<const T&, optional<T>>::value, ""); constexpr T t(3); constexpr optional<T> opt(t); static_assert(static_cast<bool>(opt) == true, ""); static_assert(opt.value().value == 3, ""); struct test_constexpr_ctor : public optional<T> { constexpr test_constexpr_ctor(const T&) {} }; } #ifndef TEST_HAS_NO_EXCEPTIONS { struct Z { Z(int) {} Z(const Z&) {throw 6;} }; typedef Z T; try { const T t(3); optional<T> opt(t); assert(false); } catch (int i) { assert(i == 6); } } #endif return 0; }