Can't construct tuple with "implicit" fieldname unless all are.

[goretkin]

julia> (a,b) = (1, 2.3) 
(1, 2.3)

julia> @NT(a,b)
NamedTuples._NT_a_b

julia> @NT(a,b=2.4)
ERROR: Invalid tuple, all values must be specified during construction @ (b = 2.4)

julia> Pkg.status("NamedTuples")
 - NamedTuples                   4.0.2

[omus]

Note that @NT(a,b) is returning a type not a named tuple with the values of a and b:

julia> typeof(@NT(a,b))
UnionAll

julia> typeof(@NT(1,2.3))
NamedTuples._NT___1_____2__{Int64,Float64}

Note you can get an instance using the names a and b via:

julia> @NT(a=a,b=b)
(a = 1, b = 2.3)

[goretkin]

Thanks for pointing that out. I hadn't noticed that. I ran into this "issue" this morning and I thought I was doing something wrong, but it turns out I had just assumed this feature exists.

So I guess this issue isn't a bug, but a feature request. I'm not sure it's a good feature, but it would come in handy for many of my uses of named tuples.

[omus]

If this feature were to be added we would probably need to separate the creation of named tuple types and instances to avoid additional confusion.