Method parameter names scoping change for nameof

[BillWagner]

Proposal is here: nameof(parameter)

A motivation for this is to enable nameof to name a parameter in an attribute constructor.

Effectively, the nameof(p) could find p as a parameter name to a function defined in the current scope.

Tasks:

• Update the nameof language reference page to show the new example.

[pkulikov]

@BillWagner when is a good time to start submitting PRs for C# 10 changes? (I would say: beginning of September?)

[BillWagner]

@pkulikov

I think we can start once these features are available in a public preview.

I'm converting issues to notes when a feature is merged into the main branch in the roslyn repo. That should give us an idea how soon features will be available to use.

[BillWagner]

The obvious example here is a method where a parameter has the NotNullWhenNotNull attribute.

[BillWagner]

@pkulikov I did assign this to me, but I'm happy to have others work on them. I just don't want to lose them in my queue. 😄

[BillWagner]

@jcouv This doesn't seem to be in .NET 6 preview 5.

The roslyn feature status page shows it as in the main branch, but without a release target. Can you clarify? Is this available yet?

[jcouv]

The feature status page says the feature will go straight into main (no feature branch needed since small feature) but is still "in progress".
I still want to get it into C# 10 (will aim for dev17.0p3).

[pkulikov]

@jcouv @BillWagner did this feature end up in C# 10? The roslyn lang feature status says it's in progress.

[jcouv]

nameof(parameter) didn't make it into C# 10.

[BillWagner]

I dropped the .NET 6 release label, and removed this issue from the related projects. I'll leave it open to address when the feature is available.