Get return type with given parameters

[nilshg]

Testing return types of functions

If you mean testing as in unit testing, Test offers the @inferred macro. If you mean testing as in checking what the return type will be before running g, you can also do this, but not through any exported methods (so beware). You can use Base._return_type and Base.return_types julia> Base.return_types(+, (Int, Float64)) 1-element Array{Any,1}: Float64 julia> Base._return_type(+, (Int, Float64)) Float64 The return type is only as stable as your functions and inputs though: julia> Base.retu…