Mutation is the source of subtle bugs. This tiny package provides a simple macro that is useful for exposing unwanted mutations.
using MutationChecks
mymul(x,y) = x .* y
myadd(x,y) = x .+ y
mysub(x,y) = x .-= y # oups
function mycalc(a,b)
c = @mutcheck myadd(a,b)
d = @mutcheck mymul(c,b)
e = @mutcheck mysub(d,c)
c = @mutcheck myadd(a,e)
end
mycalc([1,2],[3,4])ERROR: Mutation detected.
* Expression: mysub(d, c)
* Calle: Not mutated.
* Positional arguments: Mutated positions are [1].
* Keyword arguments: None were mutated.