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//===----------------------------------------------------------------------===//
// 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: GCC-ALWAYS_INLINE-FIXME
// TODO FMT This test should not require std::to_chars(floating-point)
// XFAIL: availability-fp_to_chars-missing
// Tests whether a move only type can be formatted. This is required by
// P2418R2 "Add support for std::generator-like types to std::format"
// <format>
#include <format>
#include <cassert>
#include "MoveOnly.h"
#include "make_string.h"
#include "test_macros.h"
#ifndef TEST_HAS_NO_LOCALIZATION
# include <locale>
#endif
#define SV(S) MAKE_STRING_VIEW(CharT, S)
template <class CharT>
struct std::formatter<MoveOnly, CharT> : std::formatter<int, CharT> {
auto format(const MoveOnly& m, auto& ctx) const -> decltype(ctx.out()) {
return std::formatter<int, CharT>::format(m.get(), ctx);
}
};
template <class CharT>
static void test() {
MoveOnly m{10};
CharT buffer[10];
#ifndef TEST_HAS_NO_LOCALIZATION
std::locale loc;
#endif
assert(std::format(SV("{}"), MoveOnly{}) == SV("1"));
assert(std::format(SV("{}"), m) == SV("10"));
assert(m.get() == 10);
assert(std::format(SV("{}"), std::move(m)) == SV("10"));
assert(m.get() == 10);
#ifndef TEST_HAS_NO_LOCALIZATION
assert(std::format(loc, SV("{}"), MoveOnly{}) == SV("1"));
assert(std::format(loc, SV("{}"), m) == SV("10"));
assert(m.get() == 10);
assert(std::format(loc, SV("{}"), std::move(m)) == SV("10"));
assert(m.get() == 10);
#endif
assert(std::format_to(buffer, SV("{}"), MoveOnly{}) == &buffer[1]);
assert(std::format_to(buffer, SV("{}"), m) == &buffer[2]);
assert(m.get() == 10);
assert(std::format_to(buffer, SV("{}"), std::move(m)) == &buffer[2]);
assert(m.get() == 10);
#ifndef TEST_HAS_NO_LOCALIZATION
assert(std::format_to(buffer, loc, SV("{}"), MoveOnly{}) == &buffer[1]);
assert(std::format_to(buffer, loc, SV("{}"), m) == &buffer[2]);
assert(m.get() == 10);
assert(std::format_to(buffer, loc, SV("{}"), std::move(m)) == &buffer[2]);
assert(m.get() == 10);
#endif
assert(std::format_to_n(buffer, 5, SV("{}"), MoveOnly{}).out == &buffer[1]);
assert(std::format_to_n(buffer, 5, SV("{}"), m).out == &buffer[2]);
assert(m.get() == 10);
assert(std::format_to_n(buffer, 5, SV("{}"), std::move(m)).out == &buffer[2]);
assert(m.get() == 10);
#ifndef TEST_HAS_NO_LOCALIZATION
assert(std::format_to_n(buffer, 5, loc, SV("{}"), MoveOnly{}).out == &buffer[1]);
assert(std::format_to_n(buffer, 5, loc, SV("{}"), m).out == &buffer[2]);
assert(m.get() == 10);
assert(std::format_to_n(buffer, 5, loc, SV("{}"), std::move(m)).out == &buffer[2]);
assert(m.get() == 10);
#endif
assert(std::formatted_size(SV("{}"), MoveOnly{}) == 1);
assert(std::formatted_size(SV("{}"), m) == 2);
assert(m.get() == 10);
assert(std::formatted_size(SV("{}"), std::move(m)) == 2);
assert(m.get() == 10);
#ifndef TEST_HAS_NO_LOCALIZATION
assert(std::formatted_size(loc, SV("{}"), MoveOnly{}) == 1);
assert(std::formatted_size(loc, SV("{}"), m) == 2);
assert(m.get() == 10);
assert(std::formatted_size(loc, SV("{}"), std::move(m)) == 2);
assert(m.get() == 10);
#endif
}
int main(int, char**) {
test<char>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<wchar_t>();
#endif
return 0;
}
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