140 lines
2.5 KiB
C++
140 lines
2.5 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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// <optional>
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// optional(const optional<T>& rhs);
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#include <experimental/optional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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using std::experimental::optional;
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template <class T>
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void
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test(const optional<T>& rhs, bool is_going_to_throw = false)
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{
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bool rhs_engaged = static_cast<bool>(rhs);
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#ifdef TEST_HAS_NO_EXCEPTIONS
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if (is_going_to_throw)
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return;
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#else
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try
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#endif
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{
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optional<T> lhs = rhs;
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assert(is_going_to_throw == false);
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assert(static_cast<bool>(lhs) == rhs_engaged);
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if (rhs_engaged)
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assert(*lhs == *rhs);
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}
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#ifndef TEST_HAS_NO_EXCEPTIONS
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catch (int i)
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{
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assert(i == 6);
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assert(is_going_to_throw);
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}
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#endif
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}
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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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X(int i) : i_(i) {}
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X(const X& x) : i_(x.i_) {}
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~X() {i_ = 0;}
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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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class Y
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{
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int i_;
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public:
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Y(int i) : i_(i) {}
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Y(const Y& x) : i_(x.i_) {}
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friend constexpr bool operator==(const Y& x, const Y& y) {return x.i_ == y.i_;}
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};
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int count = 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(const Z&)
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{
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if (++count == 2)
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TEST_THROW(6);
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}
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friend constexpr bool operator==(const Z& x, const Z& y) {return x.i_ == y.i_;}
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};
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int main()
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{
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{
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typedef int T;
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optional<T> rhs;
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test(rhs);
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}
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{
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typedef int T;
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optional<T> rhs(3);
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test(rhs);
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}
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{
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typedef const int T;
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optional<T> rhs(3);
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test(rhs);
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}
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{
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typedef X T;
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optional<T> rhs;
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test(rhs);
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}
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{
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typedef X T;
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optional<T> rhs(X(3));
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test(rhs);
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}
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{
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typedef const X T;
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optional<T> rhs(X(3));
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test(rhs);
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}
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{
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typedef Y T;
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optional<T> rhs;
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test(rhs);
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}
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{
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typedef Y T;
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optional<T> rhs(Y(3));
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test(rhs);
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}
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{
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typedef Z T;
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optional<T> rhs;
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test(rhs);
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}
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{
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typedef Z T;
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optional<T> rhs(Z(3));
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test(rhs, true);
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}
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}
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