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authorbors <bors@rust-lang.org>2023-05-28 18:04:53 +0000
committerbors <bors@rust-lang.org>2023-05-28 18:04:53 +0000
commit1c53407e8c7cc922d718bde61ca34f47b6d2120f (patch)
treecb51d4703b9467f6794bdee1a94df3909c2017b1 /compiler/rustc_ty_utils/src/needs_drop.rs
parent3fae1b9fc35fc449186e2138bdf8ee75dac78dae (diff)
parentc29c212f8dc80e40f099b6dbc9da3111177ba7bf (diff)
downloadrust-1c53407e8c7cc922d718bde61ca34f47b6d2120f.tar.gz
rust-1c53407e8c7cc922d718bde61ca34f47b6d2120f.zip
Auto merge of #112006 - kylematsuda:earlybinder-private, r=jackh726
Make `EarlyBinder`'s inner value private

Currently, `EarlyBinder(T)`'s inner value is public, which allows implicitly skipping the binder by indexing into the tuple struct (i.e., `x.0`). `@lcnr` suggested making `EarlyBinder`'s inner value private so users are required to explicitly call `skip_binder` (https://github.com/rust-lang/rust/issues/105779#issuecomment-1549933424) .

This PR makes the inner value private, adds `EarlyBinder::new` for constructing a new instance, and replaces uses of `x.0` with `x.skip_binder()` (or similar). It also adds some documentation to `EarlyBinder::skip_binder` explaining how to skip the binder of `&EarlyBinder<T>` to get `&T` now that the inner value is private (since previously we could just do `&x.0`).

r? `@lcnr`
Diffstat (limited to 'compiler/rustc_ty_utils/src/needs_drop.rs')
-rw-r--r--compiler/rustc_ty_utils/src/needs_drop.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_ty_utils/src/needs_drop.rs b/compiler/rustc_ty_utils/src/needs_drop.rs
index 1f9701b9322..075fde6ddb6 100644
--- a/compiler/rustc_ty_utils/src/needs_drop.rs
+++ b/compiler/rustc_ty_utils/src/needs_drop.rs
@@ -210,7 +210,7 @@ fn drop_tys_helper<'tcx>(
             match subty.kind() {
                 ty::Adt(adt_id, subst) => {
                     for subty in tcx.adt_drop_tys(adt_id.did())? {
-                        vec.push(EarlyBinder(subty).subst(tcx, subst));
+                        vec.push(EarlyBinder::new(subty).subst(tcx, subst));
                     }
                 }
                 _ => vec.push(subty),