forked from OSchip/llvm-project
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___FORMAT_FORMAT_ARGS_H
|
|
#define _LIBCPP___FORMAT_FORMAT_ARGS_H
|
|
|
|
#include <__availability>
|
|
#include <__config>
|
|
#include <__format/format_fwd.h>
|
|
#include <cstddef>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
#include <__undef_macros>
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER > 17
|
|
|
|
// TODO FMT Remove this once we require compilers with proper C++20 support.
|
|
// If the compiler has no concepts support, the format header will be disabled.
|
|
// Without concepts support enable_if needs to be used and that too much effort
|
|
// to support compilers with partial C++20 support.
|
|
#if !defined(_LIBCPP_HAS_NO_CONCEPTS)
|
|
|
|
template <class _Context>
|
|
class _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT basic_format_args {
|
|
public:
|
|
// TODO FMT Implement [format.args]/5
|
|
// [Note 1: Implementations are encouraged to optimize the representation of
|
|
// basic_format_args for small number of formatting arguments by storing
|
|
// indices of type alternatives separately from values and packing the
|
|
// former. - end note]
|
|
// Note: Change __format_arg_store to use a built-in array.
|
|
_LIBCPP_HIDE_FROM_ABI basic_format_args() noexcept = default;
|
|
|
|
template <class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI basic_format_args(
|
|
const __format_arg_store<_Context, _Args...>& __store) noexcept
|
|
: __size_(sizeof...(_Args)), __data_(__store.__args.data()) {}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI
|
|
basic_format_arg<_Context> get(size_t __id) const noexcept {
|
|
return __id < __size_ ? __data_[__id] : basic_format_arg<_Context>{};
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI size_t __size() const noexcept { return __size_; }
|
|
|
|
private:
|
|
size_t __size_{0};
|
|
const basic_format_arg<_Context>* __data_{nullptr};
|
|
};
|
|
|
|
#endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
|
|
|
|
#endif //_LIBCPP_STD_VER > 17
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___FORMAT_FORMAT_ARGS_H
|