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FunctionProperties.jl is a package which contains utilities for testing the properties of Julia functions. For example, do you need to know if f has internal branches (if statements) in order to know if a given AD optimization or symbolic pass is valid? This package's functions allows you to perform such analyses on functions from a user's code by doing a compiler-based code inspection.


@test hasbranching(1, 2) do x, y
    (x < 0 ? -x : x) + exp(y)
end # true

@test hasbranching(1, 2) do x, y
    ifelse(x < 0, -x, x) + exp(y)
end # false