Bring the Async Rust experience closer to parity with sync Rust

[nikomatsakis]

Metadata
Owner(s)	%tmandry, %nikomatsakis
Team(s)	compiler, lang, libs, libs-api
Goal document	2024h2/async

Summary

Over the next six months, we will deliver several critical async Rust building block features

• resolve the "Send bound" problem, which blocks the widespread usage of async functions in traits;
• reorganize the async WG, so that we can be better aligned and move more swiftly from here out;
• stabilize async closures, allowing for a much wider variety of async related APIs (async closures are implemented on nightly).

Tasks and status

• [ ] Overall program management (%tmandry, %nikomatsakis)
• [ ] "Send bound" problem (%nikomatsakis)
  • [x] Implementation (%compiler-errors)
  • [x] Author RFC (%nikomatsakis)
  • [x] RFC decision (lang )
  • [ ] Stabilization decision (lang )
• [ ] Async WG reorganization (%nikomatsakis)
  • [ ] Author proposal
  • [ ] Org decision (libs, lang )
• [ ] Async closures (%compiler-errors)
  • [x] implementation
  • [ ] Author RFC
  • [ ] RFC decision (lang )
  • [ ] Design meeting (lang )
  • [ ] Author call for usage (%compiler-errors)
  • [ ] Stabilization decision (lang )
• [ ] Trait for async iteration (%eholk)
  • [ ] Author RFC
  • [ ] RFC decision (libs-api, lang )
  • [ ] Design meeting (lang )
  • [ ] Implementation
• [ ] Dyn dispatch for AFIT (%spastorino)
  • [ ] Implementation (%spastorino)
  • [ ] Standard reviews (%tmandry)
• [ ] Async drop experiments (%petrochenkov)
  • [x] author MCP
  • [x] MCP decision ()
  • [ ] Implementation work
  • [ ] Design meeting (lang )
  • [ ] Standard reviews (compiler )