Using variables before initializing them (was: Forward declaring the identity of an object)

[David Alayachew]

Looks like the first email never made it through, so let me copy and paste
it here.

Hello Amber Dev Team,

I am starting this thread to start a spin off discussion from the "Question
about circular references" thread above.

In short, RedIODev mentioned something in passing that piqued my interest.
The idea was the ability to reference a declared, but uninitialized
variable (a reference), and allowing that reference to be passed to, let's
say, another constructor, but not permitting derereference until the
variable in question has fully been initialized.

I wanted to get people's perspectives on this. Is this a good idea? A bad
one? Is this too difficult to do? Not that difficult? Please let me know
your thoughts.

Thank you for your time and insight!
David Alayachew
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