C# 7.3: ref local reassignment

[BillWagner]

This feature enables ref local variables to be declared separate from their initialization, and to be re-assigned once declared.

The spec for the feature is here: dotnet/csharplang#933

This is most likely updates to reference semantics with value types, and the reference pages for local variable declaration. It may require a new topic, but that's not clear to me yet.

[BillWagner]

Updated proposal is here

[BillWagner]

The article affected by this language feature is the ref locals and returns article in the programming guide. It doesn't explicitly say that ref local reassignment is not allowed, it doesn't explain it either.

I also reviewed the ref keyword article section on ref locals and the methods topic in the programming guide. Neither need any updates.