math.fractions

math.fractions provides exact rational arithmetic.

Existing i64 API

import math.fractions

f := fractions.fraction(4, 8)
assert f.reduce().str() == '1/2'

Generic backends

fractions.Rational[T] supports signed builtin integers and math.big.Integer.

import math.big
import math.fractions

huge := big.integer_from_string('1000000000000000000000000000000')!
f := fractions.big_fraction(huge, big.integer_from_int(3))
g := fractions.rational(i32(5), i32(10))

assert f.reduce().str() == '1000000000000000000000000000000/3'
assert g.reduce().str() == '1/2'