Champion "static local functions" (16.3, Core 3)

[jcouv]

The proposal is to declare a local function as non-capturing. The keyword to indicate that would be static.

Note: if we do this, then we should also consider allowing parameters and locals of the local function to shadow parameters and locals from the containing method.

• [ ] Proposal added
• [ ] Discussed in LDM
• [ ] Decision in LDM
• [ ] Finalized (done, rejected, inactive)
• [ ] Spec'ed

Related discussion thread, including a discussion of "capture lists" (a more elaborate feature): https://github.com/dotnet/csharplang/issues/1277

Note: EE scenarios are a concern.

Do we want to allow some other modifiers (like unsafe)?

LDM history:

• https://github.com/dotnet/csharplang/blob/master/meetings/2018/LDM-2018-09-10.md
• https://github.com/dotnet/csharplang/blob/master/meetings/2019/LDM-2019-01-16.md (shadowing in lambdas)