Hello everyone, I was playing around with Meta-programming and I was wondering if it is possible to facilitate writing long constructor call for a structure with many fields . Suppose I have struct s_example arg_1 arg_2 ... arg_N end With a constructor function define_s(par…

I dont really see how to do that, I dont know how to broadcast the interpolation for symbols inside fieldnames.

Actually, you should do: function define_s(parameters) args = (f(parameters), ..., g(parameters)) object = s_example(args...) return object end

I agree with this, but what about the first solution you proposed ? Because we lose some readability for the proper definition of each arg_i, what we dont really care about is the call s_example(arg_1,arg_2, etc...) ( And actually we dont necessarily have functions f(parameters), it was just a wa…

Something like fld = fieldnames(s_example) fns = [:f, :g] calls = quote end for (f,fn) in zip(fld,fns) push!(calls.args, :($f = $fn(parameters))) end eval(quote function define_s_easen(parameters) $calls return s_example($(fld...)) end end) PS: you sound like you should look at Base.@kwdef o…

Nice ! Thank you very much, I didn’t know about Base.@kwdef and Parameters.jl, I just checked it out and it is indeed exactly what I need !

Meta-programming, structure constructor definition

New to Julia

mauro3 May 3, 2019, 12:51pm 2

You need to construct the entire function define_s_easen as expression and eval that.

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Meta-programming, structure constructor definition

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