copy(x::Symbol) isn't defined

[sbromberger]

Is there a particular reason this method was omitted?

[yuyichao]

Yes because it can't be copied. #15675

[sbromberger]

As mentioned in the linked issue, this is inconsistent. copy(5.3) works, and it's puzzling to have to do, e.g.,

copy(g::T) where T <: AbstractMetaGraph = 
    T(
        copy(g.graph), 
        copy(g.vprops), 
        copy(g.eprops), 
        copy(g.gprops), 
        g.weightfield, 
        copy(g.defaultweight)
    )

Edited: I guess I can just use deepcopy for this.

[JeffBezanson]

Generally a copy method for a (mutable) container should only copy the container structure, and not values inside.