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Auto merge of #96883 - jackh726:early-binder-2, r=oli-obk

Add EarlyBinder

Chalk has no concept of `Param` (e0ade19d13/chalk-ir/src/lib.rs (L579)) or `ReEarlyBound` (e0ade19d13/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`
This commit is contained in:
bors 2022-05-14 23:53:11 +00:00
commit 2a8a0fc423
67 changed files with 400 additions and 217 deletions

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@ -2393,7 +2393,7 @@ impl<'tcx> Operand<'tcx> {
substs: SubstsRef<'tcx>,
span: Span,
) -> Self {
let ty = tcx.type_of(def_id).subst(tcx, substs);
let ty = tcx.bound_type_of(def_id).subst(tcx, substs);
Operand::Constant(Box::new(Constant {
span,
user_ty: None,