Publish the remaining language spec proposals for features released in C# 8.0

[jcouv]

This is a follow-up on #10725

A few more features have been implemented and shipped in the C# 8.0 preview:

• default interface members (DIM)
• readonly members
• stackalloc in nested contexts
• unmanaged generic structs
• static local functions (with new shadowing rules)

Tagging @BillWagner

Looking at the side-bar for the C# doc pages (such as https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/compiler-options/), I see a list of C# 8.0 proposals. We could add DIM and readonly members.

Those two proposals are now part of the csharp-8.0 folder (ie. their stable/final address): dotnet/csharplang#2592

[BillWagner]

Thanks @jcouv I've added this to my task list.

What should we do with the spec-let for the index and range changes? Those are approved for C# 8, correct?

It would read better if those changes were merged into the original spec, but I wouldn't want to do that until having two different docs isn't useful for the development efforts.

What are your thoughts?

[jcouv]

Thanks for calling out the Ranges doc. I'll move it to csharp-8.0 folder too.

[jcouv]

Here's the new link for Ranges changes doc: https://github.com/dotnet/csharplang/blob/master/proposals/csharp-8.0/index-range-changes.md

[jcouv]

@agocke We have a proposal for Range and a proposal for Range Changes:

• https://github.com/dotnet/csharplang/blob/master/proposals/csharp-8.0/ranges.cs
• https://github.com/dotnet/csharplang/blob/master/proposals/csharp-8.0/index-range-changes.md

Feels like the latter should be merged into the former. Any objections?