bors 6153d3cbe6 Auto merge of #101212 - eholk:dyn-star, r=compiler-errors ... Initial implementation of dyn* This PR adds extremely basic and incomplete support for [dyn*](https://smallcultfollowing.com/babysteps//blog/2022/03/29/dyn-can-we-make-dyn-sized/). The goal is to get something in tree behind a flag to make collaboration easier, and also to make sure the implementation so far is not unreasonable. This PR does quite a few things: * Introduce `dyn_star` feature flag * Adds parsing for `dyn* Trait` types * Defines `dyn* Trait` as a sized type * Adds support for explicit casts, like `42usize as dyn* Debug` * Including const evaluation of such casts * Adds codegen for drop glue so things are cleaned up properly when a `dyn* Trait` object goes out of scope * Adds codegen for method calls, at least for methods that take `&self` Quite a bit is still missing, but this gives us a starting point. Note that this is never intended to become stable surface syntax for Rust, but rather `dyn*` is planned to be used as an implementation detail for async functions in dyn traits. Joint work with `@nikomatsakis` and `@compiler-errors.` r? `@bjorn3`		2022-09-14 18:10:51 +00:00
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src	Auto merge of #101212 - eholk:dyn-star, r=compiler-errors	2022-09-14 18:10:51 +00:00
Cargo.toml	Migrate to 2021	2021-09-20 22:21:42 -04:00