1 unstable release
0.1.0 | Jan 28, 2022 |
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#9 in #unit-system
Used in unit_system
8KB
158 lines
unit_system_derive
Proc_macro derivation of Unit
for the
unit_system
crate.
It derives Unit
for a struct B and declares structs which also derive
Unit
and whose BaseUnit
is the initial struct B. They form a typical SI
unit system. Roughly,
#[derive(Unit)]
struct B(f64);
results into
// The base unit is its own `BaseUnit`
impl Unit for B {
type BaseUnit = Self;
fn to_base(self) -> Self {
self
}
fn from_base(base: B) -> Self {
base
}
}
struct NB(f64);
struct MuB(f64);
struct MB(f64);
struct CB(f64);
struct DeciB(f64);
struct HB(f64);
struct KB(f64);
/// kiloB is 1000 B
impl Unit for KB {
type BaseUnit = B;
fn to_base(self) -> B {
B(self * 1000.)
}
fn from_base(base: Self::BaseUnit) -> Self {
Self(base / 1000.)
}
}
// ...the same for the rest of units
Dependencies
~1.5MB
~36K SLoC