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Auto merge of #112988 - spastorino:new-rpitit-24, r=compiler-errors

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Replace RPITIT current impl with new strategy that lowers as a GAT

This PR replaces the current implementation of RPITITs with the new implementation that we had under -Zlower-impl-trait-in-trait-to-assoc-ty flag that lowers the RPIT as a GAT on the trait and on the impls that implement that trait.

Opening this PR as a draft because this goes after #112682, ~#112981~ and ~#112983~.
As soon as those are merged, I can rebase and we should run perf, crater and test a lot.

r? `@compiler-errors`
This commit is contained in:
bors 2023-07-10 19:01:30 +00:00
commit 8ca44ef9ca
146 changed files with 1106 additions and 586 deletions
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3
compiler/rustc_session/src/options.rs
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@ -1583,9 +1583,6 @@ options! {
"what location details should be tracked when using caller_location, either \
`none`, or a comma separated list of location details, for which \
valid options are `file`, `line`, and `column` (default: `file,line,column`)"),
lower_impl_trait_in_trait_to_assoc_ty: bool = (false, parse_bool, [TRACKED],
"modify the lowering strategy for `impl Trait` in traits so that they are lowered to \
generic associated types"),
ls: bool = (false, parse_bool, [UNTRACKED],
"list the symbols defined by a library crate (default: no)"),
macro_backtrace: bool = (false, parse_bool, [UNTRACKED],