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authorbors <bors@rust-lang.org>2022-05-14 23:53:11 +0000
committerbors <bors@rust-lang.org>2022-05-14 23:53:11 +0000
commit2a8a0fc4237da544aca0d6631ee467891caad9ad (patch)
tree9a554210e3423b8808e0d3297a35b43247e4ce48 /compiler/rustc_mir_dataflow/src
parent70b3681bf621bc0de91ffab711b2350068b4c466 (diff)
parent06a1e8854c95d5be5db0bebe4630c691b604e792 (diff)
downloadrust-2a8a0fc4237da544aca0d6631ee467891caad9ad.tar.gz
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Auto merge of #96883 - jackh726:early-binder-2, r=oli-obk
Add EarlyBinder

Chalk has no concept of `Param` (https://github.com/rust-lang/chalk/blob/e0ade19d139bc784384acc6736cd960c91dd55a1/chalk-ir/src/lib.rs#L579) or `ReEarlyBound` (https://github.com/rust-lang/chalk/blob/e0ade19d139bc784384acc6736cd960c91dd55a1/chalk-ir/src/lib.rs#L1308). Everything  is just "bound" - the equivalent of rustc's late-bound. It's not completely clear yet whether to move everything to the same time of binder in rustc or add `Param` and `ReEarlyBound` in Chalk.

Either way, tracking when we have or haven't already substituted out these in rustc can be helpful.

As a first step, I'm just adding a `EarlyBinder` newtype that is required to call `subst`. I also add a couple "transparent" `bound_*` wrappers around a couple query that are often immediately substituted.

r? `@nikomatsakis`
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