mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

changes from review: add FIXME to clippy and change subst_identity to skip_binder in mir subst methods

Browse Source
This commit is contained in:
Kyle Matsuda 2023-05-06 22:56:51 -06:00
parent e4f6b8b43b
commit d27f40175f
2 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
compiler/rustc_middle/src/ty/instance.rs
View File

@ -586,7 +586,7 @@ pub fn subst_mir<T>(&self, tcx: TyCtxt<'tcx>, v: EarlyBinder<&T>) -> T
if let Some(substs) = self.substs_for_mir_body() {
v.subst(tcx, substs)
} else {
v.subst_identity()
v.skip_binder()
}
}
@ -603,7 +603,7 @@ pub fn subst_mir_and_normalize_erasing_regions<T>(
if let Some(substs) = self.substs_for_mir_body() {
tcx.subst_and_normalize_erasing_regions(substs, param_env, v)
} else {
tcx.normalize_erasing_regions(param_env, v.subst_identity())
tcx.normalize_erasing_regions(param_env, v.skip_binder())
}
}
@ -620,7 +620,7 @@ pub fn try_subst_mir_and_normalize_erasing_regions<T>(
if let Some(substs) = self.substs_for_mir_body() {
tcx.try_subst_and_normalize_erasing_regions(substs, param_env, v)
} else {
tcx.try_normalize_erasing_regions(param_env, v.subst_identity())
tcx.try_normalize_erasing_regions(param_env, v.skip_binder())
}
}

3
src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs
View File

@ -385,6 +385,9 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty<
Node::Expr(parent_expr) => {
if let Some((callee_def_id, call_substs, recv, call_args)) = get_callee_substs_and_args(cx, parent_expr)
{
// FIXME: the `subst_identity()` below seems incorrect, since we eventually
// call `tcx.try_subst_and_normalize_erasing_regions` further down
// (i.e., we are explicitly not in the identity context).
let fn_sig = cx.tcx.fn_sig(callee_def_id).subst_identity().skip_binder();
if let Some(arg_index) = recv.into_iter().chain(call_args).position(|arg| arg.hir_id == expr.hir_id)
&& let Some(param_ty) = fn_sig.inputs().get(arg_index)