Nim: [Generics] Can't infer generic params via a constructor

[awr1]

type Foo[T] = object
  a: T

var 
  bar = Foo[int](a: 1) # okay
  baz = Foo(a: 2)      # Error: object constructor needs an object type

Generic procs already have some inference capability, why not constructors?

[Araq]

Because nobody ever implemented this feature. Features start in the unfortunate state "Unimplemented".

[krux02]

This is probably related: https://github.com/nim-lang/RFCs/issues/149