Use functions as properties may not necessarily be defined when copy constructing meta

[apozharski]

No description provided.

[amontoison]

Should we add some fallbacks here in NLPModels.jl?

[apozharski]

NLPModels.jl/src/nlp/tools.jl

Lines 5 to 17 in 05bf00a

	for field in fieldnames(NLPModelMeta)
	meth = Symbol("get_", field)
	@eval begin
	@doc """
	$($meth)(nlp)
	$($meth)(meta)
	Return the value $($(QuoteNode(field))) from meta or nlp.meta.
	"""
	$meth(meta::AbstractNLPModelMeta) = getproperty(meta, $(QuoteNode(field)))
	end
	@eval $meth(nlp::AbstractNLPModel) = $meth(nlp.meta)
	@eval export $meth
	end

I think these lines create fallbacks for all of these already. Perhaps though there are some things in tools.jl that should be using the get_* functions as well to be sufficiently generic, let me checK.

[amontoison]

Thanks @apozharski !
I will finalize #540 this week and do a patch release 0.21.10.