102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "test_macros.h"
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#include <string>
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#include <cassert>
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#include <type_traits>
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// <string>
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// template <class stateT>
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// class fpos;
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template<class T, class = void>
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struct is_equality_comparable : std::false_type { };
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template<class T>
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struct is_equality_comparable
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<T, typename std::enable_if<true, decltype(std::declval<T const&>() == std::declval<T const&>(),
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(void)0)>::type
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> : std::true_type { };
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template<class T>
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void test_traits()
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{
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static_assert(std::is_default_constructible <std::fpos<T> >::value, "");
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static_assert(std::is_copy_constructible <std::fpos<T> >::value, "");
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static_assert(std::is_copy_assignable <std::fpos<T> >::value, "");
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static_assert(std::is_destructible <std::fpos<T> >::value, "");
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static_assert(is_equality_comparable <std::fpos<T> >::value, "");
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static_assert(std::is_trivially_copy_constructible<T>::value ==
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std::is_trivially_copy_constructible<std::fpos<T> >::value, "");
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static_assert(std::is_trivially_copy_assignable<T>::value ==
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std::is_trivially_copy_assignable<std::fpos<T> >::value, "");
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static_assert(std::is_trivially_destructible<T>::value ==
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std::is_trivially_destructible<std::fpos<T> >::value, "");
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}
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struct Foo { };
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int main(int, char**)
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{
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test_traits<std::mbstate_t>();
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test_traits<int>();
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test_traits<Foo>();
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// Position type requirements table 106 (in order):
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std::streampos p1(42);
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std::streamoff o1(p1);
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{
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assert(o1 == 42);
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}
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{
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std::streampos p2(42);
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std::streampos q1(43);
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std::streampos const p3(44);
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std::streampos const q2(45);
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assert(p2 != q1);
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assert(p3 != q2);
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assert(p2 != q2);
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assert(p3 != q1);
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}
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{
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std::streampos p2 = p1 + o1;
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assert(p2 == 84);
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}
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{
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std::streampos& p2 = p1 += o1;
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assert(p2 == 84);
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assert(p1 == 84);
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}
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{
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std::streampos p2 = p1 - o1;
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assert(p2 == 42);
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}
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{
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std::streampos& p2 = p1 -= o1;
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assert(p2 == 42);
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assert(p1 == 42);
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}
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{
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std::streampos p2 = o1 + p1;
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assert(p2 == 84);
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}
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{
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std::streampos q1(42);
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std::streamoff o2 = q1 - p1;
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assert(o2 == 0);
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}
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return 0;
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}
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