Macro from_us 

macro_rules! from_us {
    ($us:expr, $frac:expr, on=$scale:expr, target=$target:expr) => { ... };
    ($us:expr, $frac:expr, target=$target:expr, on=$scale:expr) => { ... };
    ($us:expr, on=$scale:expr, target=$target:expr) => { ... };
    ($us:expr, target=$target:expr, on=$scale:expr) => { ... };
    ($us:expr, $frac:expr, on=$scale:expr) => { ... };
    ($us:expr, $frac:expr, target=$target:expr) => { ... };
    ($us:expr, on=$scale:expr) => { ... };
    ($us:expr, target=$target:expr) => { ... };
    ($us:expr, $frac:expr) => { ... };
    ($us:expr) => { ... };
}

Builds a Dt from whole microseconds and an optional signed fractional remainder in attoseconds.

Sugar for Dt::from_us. Does not perform time-scale conversion.

The fractional remainder is in attoseconds — use ns! (or another *_to_attos helper) instead of writing the attosecond literal by hand.

Defaults

Omitted	Default
fraction	0
on and target	both Scale::TAI
only on=s	target=s
only target=t	on=TAI

Forms

from_us!(us)
from_us!(us, frac)
from_us!(us, on=s)
from_us!(us, target=t)
from_us!(us, on=s, target=t)
from_us!(us, target=t, on=s)
from_us!(us, frac, on=s)
from_us!(us, frac, target=t)
from_us!(us, frac, on=s, target=t)
from_us!(us, frac, target=t, on=s)

Examples

use deep_time::{Dt, Scale, from_us, ns};

// 1.3 µs → whole microseconds + 300 ns remainder
let a = from_us!(1);
let b = from_us!(1, ns!(300));
let c = from_us!(-1, ns!(-300), on=Scale::TAI);
let d = from_us!(0, on=Scale::UTC);
let e = from_us!(1, on=Scale::TAI, target=Scale::UTC);
let f = from_us!(1, target=Scale::UTC);

assert_eq!(a, Dt::from_us(1, 0, Scale::TAI, Scale::TAI));
assert_eq!(b, Dt::from_us(1, ns!(300), Scale::TAI, Scale::TAI));
assert_eq!(c, Dt::from_us(-1, ns!(-300), Scale::TAI, Scale::TAI));
assert_eq!(d, Dt::from_us(0, 0, Scale::UTC, Scale::UTC));
assert_eq!(e, Dt::from_us(1, 0, Scale::TAI, Scale::UTC));
assert_eq!(f, e);

let signed = from_us!(-1, ns!(-300));
let floor = from_us!(-2, ns!(700));
assert_eq!(signed, floor);
assert_eq!(signed, Dt::from_us(-1, ns!(-300), Scale::TAI, Scale::TAI));