Merge pull request #18566 from lnicola/sync-from-rust

minor: Sync from downstream

1 files changed, 16 insertions, 14 deletions

diff --git a/compiler/rustc_pattern_analysis/src/rustc.rs b/compiler/rustc_pattern_analysis/src/rustc.rs
index 9ea5023064c..009d817a1a9 100644
--- a/compiler/rustc_pattern_analysis/src/rustc.rs
+++ b/compiler/rustc_pattern_analysis/src/rustc.rs
@@ -85,7 +85,7 @@ pub struct RustcPatCtxt<'p, 'tcx: 'p> {
     /// not. E.g., `struct Foo { _private: ! }` cannot be seen to be empty
     /// outside its module and should not be matchable with an empty match statement.
     pub module: DefId,
-    pub param_env: ty::ParamEnv<'tcx>,
+    pub typing_env: ty::TypingEnv<'tcx>,
     /// To allocate the result of `self.ctor_sub_tys()`
     pub dropless_arena: &'p DroplessArena,
     /// Lint level at the match.
@@ -111,6 +111,8 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
     /// Type inference occasionally gives us opaque types in places where corresponding patterns
     /// have more specific types. To avoid inconsistencies as well as detect opaque uninhabited
     /// types, we use the corresponding concrete type if possible.
+    // FIXME(#132279): This will be unnecessary once we have a TypingMode which supports revealing
+    // opaque types defined in a body.
     #[inline]
     pub fn reveal_opaque_ty(&self, ty: Ty<'tcx>) -> RevealedTy<'tcx> {
         fn reveal_inner<'tcx>(cx: &RustcPatCtxt<'_, 'tcx>, ty: Ty<'tcx>) -> RevealedTy<'tcx> {
@@ -139,7 +141,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
     pub fn is_uninhabited(&self, ty: Ty<'tcx>) -> bool {
         !ty.inhabited_predicate(self.tcx).apply_revealing_opaque(
             self.tcx,
-            self.param_env,
+            self.typing_env,
             self.module,
             &|key| self.reveal_opaque_key(key),
         )
@@ -179,7 +181,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
         variant.fields.iter().map(move |field| {
             let ty = field.ty(self.tcx, args);
             // `field.ty()` doesn't normalize after instantiating.
-            let ty = self.tcx.normalize_erasing_regions(self.param_env, ty);
+            let ty = self.tcx.normalize_erasing_regions(self.typing_env, ty);
             let ty = self.reveal_opaque_ty(ty);
             (field, ty)
         })
@@ -369,7 +371,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                         let is_inhabited = v
                             .inhabited_predicate(cx.tcx, *def)
                             .instantiate(cx.tcx, args)
-                            .apply_revealing_opaque(cx.tcx, cx.param_env, cx.module, &|key| {
+                            .apply_revealing_opaque(cx.tcx, cx.typing_env, cx.module, &|key| {
                                 cx.reveal_opaque_key(key)
                             });
                         // Variants that depend on a disabled unstable feature.
@@ -430,7 +432,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
         match bdy {
             PatRangeBoundary::NegInfinity => MaybeInfiniteInt::NegInfinity,
             PatRangeBoundary::Finite(value) => {
-                let bits = value.eval_bits(self.tcx, self.param_env);
+                let bits = value.eval_bits(self.tcx, self.typing_env);
                 match *ty.kind() {
                     ty::Int(ity) => {
                         let size = Integer::from_int_ty(&self.tcx, ity).size().bits();
@@ -453,7 +455,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
         let fields: Vec<_>;
         match &pat.kind {
             PatKind::AscribeUserType { subpattern, .. }
-            | PatKind::InlineConstant { subpattern, .. } => return self.lower_pat(subpattern),
+            | PatKind::ExpandedConstant { subpattern, .. } => return self.lower_pat(subpattern),
             PatKind::Binding { subpattern: Some(subpat), .. } => return self.lower_pat(subpat),
             PatKind::Binding { subpattern: None, .. } | PatKind::Wild => {
                 ctor = Wildcard;
@@ -539,7 +541,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
             PatKind::Constant { value } => {
                 match ty.kind() {
                     ty::Bool => {
-                        ctor = match value.try_eval_bool(cx.tcx, cx.param_env) {
+                        ctor = match value.try_eval_bool(cx.tcx, cx.typing_env) {
                             Some(b) => Bool(b),
                             None => Opaque(OpaqueId::new()),
                         };
@@ -547,7 +549,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                         arity = 0;
                     }
                     ty::Char | ty::Int(_) | ty::Uint(_) => {
-                        ctor = match value.try_eval_bits(cx.tcx, cx.param_env) {
+                        ctor = match value.try_eval_bits(cx.tcx, cx.typing_env) {
                             Some(bits) => {
                                 let x = match *ty.kind() {
                                     ty::Int(ity) => {
@@ -564,7 +566,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                         arity = 0;
                     }
                     ty::Float(ty::FloatTy::F16) => {
-                        ctor = match value.try_eval_bits(cx.tcx, cx.param_env) {
+                        ctor = match value.try_eval_bits(cx.tcx, cx.typing_env) {
                             Some(bits) => {
                                 use rustc_apfloat::Float;
                                 let value = rustc_apfloat::ieee::Half::from_bits(bits);
@@ -576,7 +578,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                         arity = 0;
                     }
                     ty::Float(ty::FloatTy::F32) => {
-                        ctor = match value.try_eval_bits(cx.tcx, cx.param_env) {
+                        ctor = match value.try_eval_bits(cx.tcx, cx.typing_env) {
                             Some(bits) => {
                                 use rustc_apfloat::Float;
                                 let value = rustc_apfloat::ieee::Single::from_bits(bits);
@@ -588,7 +590,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                         arity = 0;
                     }
                     ty::Float(ty::FloatTy::F64) => {
-                        ctor = match value.try_eval_bits(cx.tcx, cx.param_env) {
+                        ctor = match value.try_eval_bits(cx.tcx, cx.typing_env) {
                             Some(bits) => {
                                 use rustc_apfloat::Float;
                                 let value = rustc_apfloat::ieee::Double::from_bits(bits);
@@ -600,7 +602,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                         arity = 0;
                     }
                     ty::Float(ty::FloatTy::F128) => {
-                        ctor = match value.try_eval_bits(cx.tcx, cx.param_env) {
+                        ctor = match value.try_eval_bits(cx.tcx, cx.typing_env) {
                             Some(bits) => {
                                 use rustc_apfloat::Float;
                                 let value = rustc_apfloat::ieee::Quad::from_bits(bits);
@@ -649,8 +651,8 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                     }
                     ty::Float(fty) => {
                         use rustc_apfloat::Float;
-                        let lo = lo.as_finite().map(|c| c.eval_bits(cx.tcx, cx.param_env));
-                        let hi = hi.as_finite().map(|c| c.eval_bits(cx.tcx, cx.param_env));
+                        let lo = lo.as_finite().map(|c| c.eval_bits(cx.tcx, cx.typing_env));
+                        let hi = hi.as_finite().map(|c| c.eval_bits(cx.tcx, cx.typing_env));
                         match fty {
                             ty::FloatTy::F16 => {
                                 use rustc_apfloat::ieee::Half;