std::chrono...ck::from_utc(3)

💅 std::chrono::file_clock::to_utc / std::chrono::file_clock::from_utc 💅

okay so bestie, this page is from the C++ Standard Libary manual, and the main characters are std::chrono::file_clock::to_utc and std::chrono::file_clock::from_utc — iconic clock-conversion duo, no cap 🕰️✨

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✨ Synopsis ✨

two function templates, both since C++20, both optional — here's the exact shape:

          template< class Duration >
                                                                        (since
       C++20)
          static std::chrono::utc_time</* see below */>             (1)
       (optional)

              to_utc( const std::chrono::file_time<Duration>& t );
          template< class Duration >
                                                                        (since
       C++20)
          static std::chrono::file_time</* see below */>            (2)
       (optional)

              from_utc( const std::chrono::utc_time<Duration>& t );

1. Converts the file_time t to a utc_time representing the same point in time.
2. Converts the utc_time t to a file_time representing the same point in time.

The duration of the return type is computed from Duration in an unspecified manner.

These function templates are optional: an implementation may choose to instead provide to_sys and from_sys. like, they can lowkey swap them out on you, so don't act surprised 👀

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🫶 Return value 🫶

1. A utc_time representing the same point in time as the argument.
2. A file_time representing the same point in time as the argument.

same moment, different clock outfit — slay 💫

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🌸 Notes 🌸

bestie, real talk: user code should usually use std::chrono::clock_cast, which provides a generic interface to convert time points between clocks, rather than call these functions directly. it's giving "use the main character API, not the side quest" energy 🧚

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🦋 Example 🦋

This section is incomplete.

Reason: no example.

not me showing up with an empty example section 😭 it's literally just vibes and a todo 🎀

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👑 See also 👑

• to_sys — converts between file_time and sys_time
• from_sys — (public static member function) [static] (optional)
• clock_cast — convert time points of one clock to another (C++20) (function template)

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💀 Category 💀

• Todo no example

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with all the love and zero cap, this page came from source/version http://cppreference.com, dated 2024.06.10, page std::chrono...ck::from_utc(3) 🎀✨🦋