Usually operations on Rational numbers don’t return references to their arguments: julia> d = Rational{BigInt}(2) 2//1 julia> d.num === (1*d).num false julia> d.num === (0+d).num false I assumed that this holds in general, but I was wrong: julia> d.num === inv(d).den true It turns out that inv…

Should inv(::Rational) make copies of the numerator and denominator?

Elrod October 6, 2022, 11:30am 4

Someone who really wants the performance of MutableArithmetics should be grateful inv(::Rational) doesn’t allocate by default.

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