[libcxx-commits] [libcxx] [libc++][sstream] Explicitly delete special member functions (PR #80254)

[Mark de Wever via libcxx-commits]

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@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <sstream>
+
+// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
+// class basic_ostringstream
+//     : public basic_ostream<charT, traits>
+// {
+// public:
+//     typedef charT                          char_type;
+//     typedef traits                         traits_type;
+//     typedef typename traits_type::int_type int_type;
+//     typedef typename traits_type::pos_type pos_type;
+//     typedef typename traits_type::off_type off_type;
+//     typedef Allocator                      allocator_type;
+//
+//     basic_ostringstream(const basic_ostringstream&) = delete;
+//     basic_ostringstream& operator=(const basic_ostringstream&) = delete;
+//
+//     basic_ostringstream(basic_ostringstream&& rhs);
+//     basic_ostringstream& operator=(basic_ostringstream&& rhs);
+
+#include <sstream>
+#include <type_traits>
+
+#include "test_macros.h"
+
+// Types
+
+static_assert((std::is_base_of<std::basic_ostream<char>, std::basic_ostringstream<char> >::value), "");
+static_assert((std::is_same<std::basic_ostringstream<char>::char_type, char>::value), "");
+static_assert((std::is_same<std::basic_ostringstream<char>::traits_type, std::char_traits<char> >::value), "");
+static_assert((std::is_same<std::basic_ostringstream<char>::int_type, std::char_traits<char>::int_type>::value), "");
+static_assert((std::is_same<std::basic_ostringstream<char>::pos_type, std::char_traits<char>::pos_type>::value), "");
+static_assert((std::is_same<std::basic_ostringstream<char>::off_type, std::char_traits<char>::off_type>::value), "");
+static_assert((std::is_same<std::basic_ostringstream<char>::allocator_type, std::allocator<char> >::value), "");
+
+// Copy properties
+
+static_assert(!std::is_copy_constructible<std::istringstream>::value, "");
+static_assert(!std::is_copy_assignable<std::istringstream>::value, "");
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+static_assert(!std::is_copy_constructible<std::wistringstream>::value, "");
+static_assert(!std::is_copy_assignable<std::wistringstream>::value, "");
+#endif
+
+// Move properties
+
+static_assert(std::is_move_constructible<std::istringstream>::value, "");
+static_assert(std::is_move_assignable<std::istringstream>::value, "");
+
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+static_assert(std::is_move_constructible<std::wistringstream>::value, "");
+static_assert(std::is_move_assignable<std::wistringstream>::value, "");
+#endif
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mordante wrote:

you copy pasted `istringstream` and didn't update the changes. The same happened to the other two tests below.

https://github.com/llvm/llvm-project/pull/80254