# core/time.h

## Free functions

### `constexpr Time operator""_ns(unsigned long long v) noexcept { ... }`
### `return Time::from_ns(static_cast<Time::rep>(v));`
### `constexpr Time operator""_us(unsigned long long v) noexcept { ... }`
### `return Time::from_us(static_cast<Time::rep>(v));`
### `constexpr Time operator""_ms(unsigned long long v) noexcept { ... }`
### `return Time::from_ms(static_cast<Time::rep>(v));`
### `constexpr Time operator""_s (unsigned long long v) noexcept { ... }`
### `return Time::from_s (static_cast<Time::rep>(v));`

## class Time — public interface

### `constexpr Time() : _nsec(0) { ... }`
### `explicit constexpr Time(rep ns) : _nsec(ns) { ... }`
### `static constexpr Time from_ns(rep ns) noexcept { ... }`
### `return Time(ns);`
### `static constexpr Time from_us(rep us) noexcept { ... }`
### `return Time(us * 1000ULL);`
### `static constexpr Time from_ms(rep ms) noexcept { ... }`
### `return Time(ms * 1000ULL * 1000ULL);`
### `static constexpr Time from_s (rep s ) noexcept { ... }`
### `return Time(s * 1000ULL * 1000ULL * 1000ULL);`
### `constexpr rep ns() const noexcept { ... }`
### `constexpr rep count() const noexcept { ... }`
### `static constexpr rep us_to_ns(rep us) noexcept { ... }`
### `static constexpr rep ms_to_ns(rep ms) noexcept { ... }`
### `return Time(a._nsec + b._nsec);`
### `return Time(a._nsec * b._nsec);`
### `return safe_sub(a, b);`
### `if (a._nsec < b._nsec) { ... }`
### `return Time(a._nsec - b._nsec);`
### `constexpr Time unsafe_sub(Time t) const noexcept { ... }`
### `return Time(this->_nsec - t._nsec);`