Rename `adjustment::PointerCast` and variants using it to `PointerCoercion`

It makes it sound like the `ExprKind` and `Rvalue` are supposed to represent all pointer related
casts, when in reality their just used to share a some enum variants. Make it clear there these
are only coercion to make it clear why only some pointer related "casts" are in the enum.

1 files changed, 6 insertions, 2 deletions

diff --git a/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs b/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs
index 6c01fd63b1e..225c38efb2c 100644
--- a/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs
+++ b/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs
@@ -9,7 +9,7 @@ use rustc_middle::mir::{
     Body, CallSource, CastKind, ConstraintCategory, FakeReadCause, Local, LocalInfo, Location,
     Operand, Place, Rvalue, Statement, StatementKind, TerminatorKind,
 };
-use rustc_middle::ty::adjustment::PointerCast;
+use rustc_middle::ty::adjustment::PointerCoercion;
 use rustc_middle::ty::{self, RegionVid, TyCtxt};
 use rustc_span::symbol::{kw, Symbol};
 use rustc_span::{sym, DesugaringKind, Span};
@@ -584,7 +584,11 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         },
                         // If we see an unsized cast, then if it is our data we should check
                         // whether it is being cast to a trait object.
-                        Rvalue::Cast(CastKind::Pointer(PointerCast::Unsize), operand, ty) => {
+                        Rvalue::Cast(
+                            CastKind::PointerCoercion(PointerCoercion::Unsize),
+                            operand,
+                            ty,
+                        ) => {
                             match operand {
                                 Operand::Copy(place) | Operand::Move(place) => {
                                     if let Some(from) = place.as_local() {