[Proposal]: Simple lambda parameters with modifiers

[CyrusNajmabadi]

Simple lambda parameters with modifiers

• Specification: https://github.com/dotnet/csharplang/blob/main/proposals/simple-lambda-parameters-with-modifiers.md
• Discussion: Link to the discussion topic for this feature.

Summary

Allow lambda parameters to be declared with modifiers without requiring their type names. For example, (ref entry) => ... rather than (ref FileSystemEntry entry) => ....

Design meetings

https://github.com/dotnet/csharplang/blob/main/meetings/2024/LDM-2024-02-21.md#declaration-of-refout-parameters-in-lambdas-without-typename
https://github.com/dotnet/csharplang/blob/main/meetings/2024/LDM-2024-10-16.md#simple-lambda-parameters