301 lines
8.8 KiB
C++
301 lines
8.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11
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// XFAIL: libcpp-no-exceptions
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// <optional>
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// template <class T> void swap(optional<T>& x, optional<T>& y)
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// noexcept(noexcept(x.swap(y)));
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#include <experimental/optional>
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#include <type_traits>
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#include <cassert>
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using std::experimental::optional;
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class X
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{
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int i_;
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public:
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static unsigned dtor_called;
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X(int i) : i_(i) {}
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X(X&& x) = default;
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X& operator=(X&&) = default;
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~X() {++dtor_called;}
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friend bool operator==(const X& x, const X& y) {return x.i_ == y.i_;}
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};
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unsigned X::dtor_called = 0;
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class Y
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{
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int i_;
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public:
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static unsigned dtor_called;
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Y(int i) : i_(i) {}
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Y(Y&&) = default;
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~Y() {++dtor_called;}
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friend constexpr bool operator==(const Y& x, const Y& y) {return x.i_ == y.i_;}
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friend void swap(Y& x, Y& y) {std::swap(x.i_, y.i_);}
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};
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unsigned Y::dtor_called = 0;
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class Z
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{
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int i_;
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public:
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Z(int i) : i_(i) {}
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Z(Z&&) {throw 7;}
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friend constexpr bool operator==(const Z& x, const Z& y) {return x.i_ == y.i_;}
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friend void swap(Z& x, Z& y) {throw 6;}
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};
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int main()
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{
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{
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optional<int> opt1;
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optional<int> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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}
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{
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optional<int> opt1(1);
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optional<int> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == false);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 1);
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}
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{
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optional<int> opt1;
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optional<int> opt2(2);
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 2);
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assert(static_cast<bool>(opt2) == false);
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}
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{
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optional<int> opt1(1);
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optional<int> opt2(2);
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 2);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 1);
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}
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{
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optional<X> opt1;
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optional<X> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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assert(X::dtor_called == 0);
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}
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{
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optional<X> opt1(1);
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optional<X> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == false);
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X::dtor_called = 0;
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swap(opt1, opt2);
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assert(X::dtor_called == 1);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 1);
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}
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{
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optional<X> opt1;
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optional<X> opt2(2);
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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X::dtor_called = 0;
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swap(opt1, opt2);
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assert(X::dtor_called == 1);
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 2);
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assert(static_cast<bool>(opt2) == false);
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}
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{
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optional<X> opt1(1);
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optional<X> opt2(2);
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static_assert(noexcept(swap(opt1, opt2)) == true, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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X::dtor_called = 0;
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swap(opt1, opt2);
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assert(X::dtor_called == 1); // from inside std::swap
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 2);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 1);
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}
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{
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optional<Y> opt1;
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optional<Y> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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assert(Y::dtor_called == 0);
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}
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{
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optional<Y> opt1(1);
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optional<Y> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == false);
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Y::dtor_called = 0;
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swap(opt1, opt2);
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assert(Y::dtor_called == 1);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 1);
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}
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{
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optional<Y> opt1;
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optional<Y> opt2(2);
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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Y::dtor_called = 0;
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swap(opt1, opt2);
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assert(Y::dtor_called == 1);
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 2);
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assert(static_cast<bool>(opt2) == false);
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}
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{
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optional<Y> opt1(1);
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optional<Y> opt2(2);
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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Y::dtor_called = 0;
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swap(opt1, opt2);
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assert(Y::dtor_called == 0);
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 2);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 1);
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}
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{
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optional<Z> opt1;
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optional<Z> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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swap(opt1, opt2);
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == false);
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}
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{
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optional<Z> opt1;
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opt1.emplace(1);
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optional<Z> opt2;
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == false);
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try
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{
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swap(opt1, opt2);
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assert(false);
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}
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catch (int i)
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{
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assert(i == 7);
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}
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == false);
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}
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{
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optional<Z> opt1;
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optional<Z> opt2;
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opt2.emplace(2);
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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try
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{
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swap(opt1, opt2);
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assert(false);
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}
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catch (int i)
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{
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assert(i == 7);
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}
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assert(static_cast<bool>(opt1) == false);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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}
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{
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optional<Z> opt1;
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opt1.emplace(1);
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optional<Z> opt2;
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opt2.emplace(2);
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static_assert(noexcept(swap(opt1, opt2)) == false, "");
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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try
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{
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swap(opt1, opt2);
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assert(false);
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}
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catch (int i)
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{
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assert(i == 6);
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}
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assert(static_cast<bool>(opt1) == true);
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assert(*opt1 == 1);
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assert(static_cast<bool>(opt2) == true);
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assert(*opt2 == 2);
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}
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}
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