Allow single valued enums

[schutm]

This will allow single valued enums like

defenum SingleValuedEnum do
  value OneValue, "one"
end

[edouardmenayde]

Could this be integrated ?
It can be useful when you know you gonna need an enum but do not want to write the specifics yet.

[danielatdpg]

Could this be integrated ? It can be useful when you know you gonna need an enum but do not want to write the specifics yet.

Yes, please, seconding this