time_zone.hpp

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// Copyright Take Vos 2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../macros.hpp"
#include "terminate.hpp"
#include "exception.hpp"
#include <chrono>
 
hi_export_module(hikogui.utility.time_zone);
 
hi_export namespace hi { inline namespace v1 {
namespace detail {
 
[[nodiscard]] inline std::chrono::time_zone const *_cached_current_zone() noexcept
{
    try {
        return std::chrono::current_zone();
    } catch (...) {
        hi_no_default("std::chrono::current_zone() throws");
    }
}
 
} // namespace detail
 
[[nodiscard]] inline std::chrono::time_zone const& cached_current_zone() noexcept
{
    static auto *zone = detail::_cached_current_zone();
    return *zone;
}
 
}} // namespace hi::v1