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/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TRINITYCORE_STRING_FORMAT_H
#define TRINITYCORE_STRING_FORMAT_H
#include "Optional.h"
#include <fmt/core.h>
namespace Trinity
{
template<typename... Args>
using FormatString = fmt::format_string<Args...>;
using FormatStringView = fmt::string_view;
using FormatArgs = fmt::format_args;
template<typename... Args>
constexpr auto MakeFormatArgs(Args&&... args) { return fmt::make_format_args(args...); }
/// Default TC string format function.
template<typename... Args>
inline std::string StringFormat(FormatString<Args...> fmt, Args&&... args)
{
try
{
return fmt::format(fmt, std::forward<Args>(args)...);
}
catch (std::exception const& formatError)
{
return fmt::format("An error occurred formatting string \"{}\" : {}", FormatStringView(fmt), formatError.what());
}
}
template<typename OutputIt, typename... Args>
inline OutputIt StringFormatTo(OutputIt out, FormatString<Args...> fmt, Args&&... args)
{
try
{
return fmt::format_to(out, fmt, std::forward<Args>(args)...);
}
catch (std::exception const& formatError)
{
return fmt::format_to(out, "An error occurred formatting string \"{}\" : {}", FormatStringView(fmt), formatError.what());
}
}
inline std::string StringVFormat(FormatStringView fmt, FormatArgs args)
{
try
{
return fmt::vformat(fmt, args);
}
catch (std::exception const& formatError)
{
return fmt::format("An error occurred formatting string \"{}\" : {}", fmt, formatError.what());
}
}
template<typename OutputIt>
inline OutputIt StringVFormatTo(OutputIt out, FormatStringView fmt, FormatArgs args)
{
try
{
return fmt::vformat_to(out, fmt, args);
}
catch (std::exception const& formatError)
{
return fmt::format_to(out, "An error occurred formatting string \"{}\" : {}", fmt, formatError.what());
}
}
/// Returns true if the given char pointer is null.
inline bool IsFormatEmptyOrNull(char const* fmt)
{
return fmt == nullptr;
}
/// Returns true if the given std::string is empty.
inline bool IsFormatEmptyOrNull(std::string const& fmt)
{
return fmt.empty();
}
/// Returns true if the given std::string_view is empty.
inline constexpr bool IsFormatEmptyOrNull(std::string_view fmt)
{
return fmt.empty();
}
inline constexpr bool IsFormatEmptyOrNull(fmt::string_view fmt)
{
return fmt.size() == 0;
}
}
template<typename T, typename Char>
struct fmt::formatter<Optional<T>, Char> : formatter<T, Char>
{
template<typename FormatContext>
auto format(Optional<T> const& value, FormatContext& ctx) const -> decltype(ctx.out())
{
if (value.has_value())
return formatter<T, Char>::format(*value, ctx);
return formatter<string_view, Char>().format("(nullopt)", ctx);
}
};
#endif
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