diff --git a/libcxx/include/concepts b/libcxx/include/concepts --- a/libcxx/include/concepts +++ b/libcxx/include/concepts @@ -334,6 +334,14 @@ assignable_from<_Tp&, _Tp> && swappable<_Tp>; +template +concept copyable = + copy_constructible<_Tp> && + movable<_Tp> && + assignable_from<_Tp&, _Tp&> && + assignable_from<_Tp&, const _Tp&> && + assignable_from<_Tp&, const _Tp>; + // [concept.invocable] template concept invocable = requires(_Fn&& __fn, _Args&&... __args) { diff --git a/libcxx/test/std/concepts/object/copyable.compile.pass.cpp b/libcxx/test/std/concepts/object/copyable.compile.pass.cpp new file mode 100644 --- /dev/null +++ b/libcxx/test/std/concepts/object/copyable.compile.pass.cpp @@ -0,0 +1,172 @@ +//===----------------------------------------------------------------------===// +// +// 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++03, c++11, c++14, c++17 +// UNSUPPORTED: libcpp-no-concepts + +// template +// concept copyable = see below; + +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); + +struct S {}; +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); +static_assert(std::copyable); + +static_assert(std::copyable >); +static_assert( + std::copyable< + std::vector > >); // IFNDR: doesn't model copyable +static_assert(std::copyable >); +static_assert(std::copyable >); +static_assert(std::copyable >); +static_assert( + std::copyable< + std::map, + std::unique_ptr > >); // IFNDR: doesn't model copyable +static_assert(std::copyable > >); +static_assert(std::copyable > >); +static_assert(std::copyable, + std::unique_ptr > >); // IFNDR: doesn't model copyable +static_assert(std::copyable >); +static_assert(std::copyable > >); + +// Not objects +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); +static_assert(!std::copyable); + +// Not copy constructible or copy assignable +static_assert(!std::copyable >); + +// Not assignable +static_assert(!std::copyable); +static_assert(!std::copyable); + +struct no_copy_constructor { + no_copy_constructor(no_copy_constructor const&) = delete; + no_copy_constructor(no_copy_constructor&&) = default; +}; +static_assert(!std::copyable); + +struct no_copy_assignment { + no_copy_assignment& operator=(no_copy_assignment const&) = delete; + no_copy_assignment& operator=(no_copy_assignment&&) = default; +}; +static_assert(!std::copyable); + +struct no_copy_assignment_mutable { + no_copy_assignment_mutable& + operator=(no_copy_assignment_mutable const&) = default; + no_copy_assignment_mutable& operator=(no_copy_assignment_mutable&) = delete; + no_copy_assignment_mutable& operator=(no_copy_assignment_mutable&&) = default; +}; +static_assert(std::is_copy_assignable_v); +static_assert(!std::copyable); + +struct no_const_value_assignment { + no_const_value_assignment& + operator=(no_const_value_assignment const) = delete; +}; +static_assert(!std::copyable); + +struct derived_from_noncopyable : std::unique_ptr {}; +static_assert(!std::copyable); + +struct has_noncopyable { + std::unique_ptr x; +}; +static_assert(!std::copyable); + +struct has_const_member { + int const x; +}; +static_assert(!std::copyable); + +struct has_volatile_member { + int volatile x; +}; +static_assert(std::copyable); + +struct has_cv_member { + int const volatile x; +}; +static_assert(!std::copyable); + +struct has_lvalue_reference_member { + int& x; +}; +static_assert(!std::copyable); + +struct has_rvalue_reference_member { + int&& x; +}; +static_assert(!std::copyable); + +struct has_array_member { + int x[5]; +}; +static_assert(std::copyable); + +struct has_function_ref_member { + int (&f)(); +}; +static_assert(!std::copyable); + +int main(int, char**) { return 0; }