From aa5a21450a070fdea66a07d3cab3b69e6735c328 Mon Sep 17 00:00:00 2001 From: beepster4096 <19316085+beepster4096@users.noreply.github.com> Date: Thu, 25 Sep 2025 20:54:54 -0700 Subject: ProjectionElem::Subtype -> CastKind::Subtype --- compiler/rustc_middle/src/mir/syntax.rs | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'compiler/rustc_middle/src/mir/syntax.rs') diff --git a/compiler/rustc_middle/src/mir/syntax.rs b/compiler/rustc_middle/src/mir/syntax.rs index e6c8512564e..a823c365394 100644 --- a/compiler/rustc_middle/src/mir/syntax.rs +++ b/compiler/rustc_middle/src/mir/syntax.rs @@ -1275,18 +1275,6 @@ pub enum ProjectionElem { /// A transmute from an unsafe binder to the type that it wraps. This is a projection /// of a place, so it doesn't necessarily constitute a move out of the binder. UnwrapUnsafeBinder(T), - - /// A `Subtype(T)` projection is applied to any `StatementKind::Assign` where - /// type of lvalue doesn't match the type of rvalue, the primary goal is making subtyping - /// explicit during optimizations and codegen. - /// - /// This projection doesn't impact the runtime behavior of the program except for potentially changing - /// some type metadata of the interpreter or codegen backend. - /// - /// This goal is achieved with mir_transform pass `Subtyper`, which runs right after - /// borrowchecker, as we only care about subtyping that can affect trait selection and - /// `TypeId`. - Subtype(T), } /// Alias for projections as they appear in places, where the base is a place @@ -1513,6 +1501,18 @@ pub enum CastKind { /// MIR is well-formed if the input and output types have different sizes, /// but running a transmute between differently-sized types is UB. Transmute, + + /// A `Subtype` cast is applied to any `StatementKind::Assign` where + /// type of lvalue doesn't match the type of rvalue, the primary goal is making subtyping + /// explicit during optimizations and codegen. + /// + /// This cast doesn't impact the runtime behavior of the program except for potentially changing + /// some type metadata of the interpreter or codegen backend. + /// + /// This goal is achieved with mir_transform pass `Subtyper`, which runs right after + /// borrowchecker, as we only care about subtyping that can affect trait selection and + /// `TypeId`. + Subtype, } /// Represents how a [`CastKind::PointerCoercion`] was constructed. -- cgit 1.4.1-3-g733a5