std::chrono...nth_day::day(3)

🦋 std::chrono::month_day::month, std::chrono::month_day::day 🦋

okay so bestie, we're deep in the C++ Standard Library manual (C++ Standard Libary, yes that's how the page spells it, i don't make the rules 💅) and today's main character is the humble month_day accessor duo. they're getters. they're constexpr. they're noexcept. they're literally the chillest little functions you will ever meet. 🫶

✨ NAME ✨

std::chrono::month_day::month, std::chrono::month_day::day — bestie, it's giving "same thing twice" energy:

std::chrono::month_day::month,std::chrono::month_day::day

that's it. that's the name. two accessors, one month_day object, zero drama. 💖

🌸 Synopsis 🌸

here's the whole vibe, copy-pasted straight from the source because i would never do you dirty:

constexpr std::chrono::month month() const noexcept; (1) (since C++20)
constexpr std::chrono::day day() const noexcept;     (1) (since C++20)

(yes, both of them say (1) on the page — that's what it says, i'm just the messenger, don't come for me 😭)

what do they do? they retrieve the month and day values stored in this month_day object. that's the whole job. slay. 👑

🎀 Return value 🎀

1. returns the stored std::chrono::month value. 💖
2. returns the stored std::chrono::day value. 🦋

that's it. no surprises, no hidden side quests, no cap. ✨

🌈 Example 🌈

okay this is the part where you go "ohhh that's actually kinda cute" — look at this:

// Run this code

#include <chrono>

int main()
{
    constexpr auto md{std::chrono::July/15};
    static_assert(md.month() == std::chrono::month(7));
    static_assert(md.day() == std::chrono::day(15));
}

the way that std::chrono::July/15 just builds a month_day out of thin air and then you can static_assert on it at compile time?? that's main character energy fr fr. md.month() gives you back std::chrono::month(7), md.day() gives you back std::chrono::day(15), and it all compiles before your code even runs. iconic. 🔥

ngl the whole point of these two is that everything is constexpr and noexcept — so go wild, check your dates at compile time, live your best life. 💜

okay bye bestie, go read your calendar code, and remember — this little page came from cppreference.com, dated 2024.06.10, filed under std::chrono...nth_day::day(3) (the page title got truncated mid-word, she's doing her best 🥺). love u, hydrate, and may all your static_asserts pass on the first try. 🍓🧚💫