basic_format_args.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2023 Tobias Hienzsch
 
#ifndef TETL_FORMAT_BASIC_FORMAT_ARGS_HPP
#define TETL_FORMAT_BASIC_FORMAT_ARGS_HPP
 
#include <etl/_cstddef/size_t.hpp>
#include <etl/_format/basic_format_arg.hpp>
#include <etl/_format/basic_format_context.hpp>
#include <etl/_format/format_arg_store.hpp>
#include <etl/_span/span.hpp>
 
namespace etl {
 
template <typename Context>
struct basic_format_args {
    constexpr basic_format_args() noexcept = default;
 
    template <typename... Args>
    constexpr basic_format_args(detail::format_arg_store<Context, Args...> const& store) noexcept
        : _args{store.args}
    {
    }
 
    [[nodiscard]] constexpr auto get(size_t i) const noexcept -> basic_format_arg<Context>
    {
        if (i >= _args.size()) {
            return basic_format_arg<Context>{};
        }
        return _args[i];
    }
 
private:
    span<basic_format_arg<Context> const> _args;
};
 
using format_args  = basic_format_args<format_context>;
using wformat_args = basic_format_args<wformat_context>;
 
} // namespace etl
 
#endif // TETL_FORMAT_BASIC_FORMAT_ARGS_HPP