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EXPERIMENT: Make `async fn`, `.await`, `async move? {` legal on 2015 #64286

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Centril opened this issue Sep 8, 2019 · 0 comments

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@Centril
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commented Sep 8, 2019

The parser currently will not parse async fn, async move? $block, and <expr>.await on Rust 2015.

Check whether:

  • doing so would simplify the parser & the grammar.
  • it is feasible with a crater run for <expr>.await and async move? $block

Drawbacks include:

  • folks having fewer incentives to use Rust 2018.
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