fix(reborrow): recursive implementation#159103
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If Reborrow finds '&'a mut T' fields where 'a is the Reborrowed type's first lifetime parameter (currently the only lifetime that is allowed to reborrow) then it inserts a Deref and borrow of the T, and likewise if it finds a 'T: Reborrow' field then the field type is recursed into. This makes Reborrow always produce the correct borrow checking logic at the cost of most probably being inconsiderately expensive. The thinking is that performance will be a followup consideration.
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt This PR changes MIR cc @oli-obk, @RalfJung, @JakobDegen, @vakaras Some changes occurred to the CTFE machinery Some changes occurred to the CTFE / Miri interpreter cc @rust-lang/miri Some changes occurred to constck cc @fee1-dead This PR changes rustc_public |
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cc @bjorn3
cc @rust-lang/clippy |
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If Reborrow finds '&'a mut T' fields where 'a is the Reborrowed type's first lifetime parameter (currently the only lifetime that is allowed to reborrow) then it inserts a Deref and borrow of the T, and likewise if it finds a 'T: Reborrow' field then the field type is recursed into.
This makes Reborrow always produce the correct borrow checking logic at the cost of most probably being inconsiderately expensive. The thinking is that performance will be a followup consideration.
r? @oli-obk