feat(units): add coherent(), update unit defs

packages/units/src/accel.ts

@@ -3,22 +3,16 @@ import { ft, m } from "./length.js";
 import { s } from "./time.js";
 import { defUnit, div, mul, pow } from "./unit.js";
 
-export const m_s2 = defUnit(
-	"m/s2",
-	"meter per second squared",
-	div(m, pow(s, 2))
-);
+const s2 = pow(s, 2);
 
-export const ft_s2 = defUnit(
-	"ft/s2",
-	"foot per second squared",
-	div(ft, pow(s, 2))
-);
+export const m_s2 = defUnit("m/s2", "meter per second squared", div(m, s2));
+
+export const ft_s2 = defUnit("ft/s2", "foot per second squared", div(ft, s2));
 
 export const rad_s2 = defUnit(
 	"rad/s2",
 	"radian per second squared",
-	div(rad, pow(s, 2))
+	div(rad, s2)
 );
 
 export const g0 = defUnit("g0", "standard gravity", mul(m_s2, 9.80665));

packages/units/src/electric.ts

@@ -1,9 +1,9 @@
 import { m2 } from "./area.js";
 import { J } from "./energy.js";
 import { h, s } from "./time.js";
-import { defUnit, div, mul, prefix, unit } from "./unit.js";
+import { coherent, defUnit, div, mul, prefix } from "./unit.js";
 
-export const A = defUnit("A", "ampere", unit(3, 1, 0, true));
+export const A = defUnit("A", "ampere", coherent(3));
 export const mA = defUnit("mA", "milliampere", prefix("m", A));
 export const mAh = defUnit("mAh", "milliampere-hour", mul(mA, h));
 

packages/units/src/length.ts

@@ -1,6 +1,6 @@
-import { defUnit, mul, prefix, unit } from "./unit.js";
+import { coherent, defUnit, mul, prefix } from "./unit.js";
 
-export const m = defUnit("m", "meter", unit(1, 1, 0, true));
+export const m = defUnit("m", "meter", coherent(1));
 export const cm = defUnit("cm", "centimeter", prefix("c", m));
 export const mm = defUnit("mm", "millimeter", prefix("m", m));
 export const µm = defUnit("µm", "micrometer", prefix("µ", m));

packages/units/src/luminous.ts

@@ -1,8 +1,8 @@
 import { sr } from "./angle.js";
 import { m2 } from "./area.js";
-import { defUnit, div, mul, unit } from "./unit.js";
+import { coherent, defUnit, div, mul } from "./unit.js";
 
-export const cd = defUnit("cd", "candela", unit(6, 1, 0, true));
+export const cd = defUnit("cd", "candela", coherent(6));
 
 export const lm = defUnit("lm", "lumen", mul(cd, sr));
 export const lx = defUnit("lx", "lux", div(lm, m2));

packages/units/src/substance.ts

@@ -1,3 +1,3 @@
-import { defUnit, unit } from "./unit.js";
+import { coherent, defUnit } from "./unit.js";
 
-export const mol = defUnit("mol", "mole", unit(5, 1, 0, true));
+export const mol = defUnit("mol", "mole", coherent(5));

packages/units/src/temperature.ts

@@ -1,6 +1,6 @@
-import { defUnit, unit } from "./unit.js";
+import { coherent, defUnit, unit } from "./unit.js";
 
-export const K = defUnit("K", "kelvin", unit(4, 1));
+export const K = defUnit("K", "kelvin", coherent(4));
 export const celsius = defUnit("℃", "degree celsius", unit(4, 1, 273.15));
 export const fahrenheit = defUnit(
 	"℉",

packages/units/src/time.ts

@@ -1,6 +1,6 @@
-import { defUnit, mul, prefix, unit } from "./unit.js";
+import { coherent, defUnit, mul, prefix } from "./unit.js";
 
-export const s = defUnit("s", "second", unit(2, 1, 0, true));
+export const s = defUnit("s", "second", coherent(2));
 export const ms = defUnit("ms", "millisecond", prefix("m", s));
 export const µs = defUnit("µs", "microsecond", prefix("µ", s));
 export const ns = defUnit("ns", "nanosecond", prefix("n", s));

packages/units/src/unit.ts

@@ -30,6 +30,13 @@ export const unit = (
 	coherent,
 });
 
+/**
+ * Syntax sugar for defining coherent SI base units. See {@link unit}.
+ *
+ * @param dim
+ */
+export const coherent = (dim: Dimensions | number) => unit(dim, 1, 0, true);
+
 /**
  * Returns a new dimensionless unit (i.e. all SI dimensions are zero) with given
  * `scale` factor.