rustdoc, yet from_param_env 2

Author: lcnr

compiler/rustc_trait_selection/src/traits/auto_trait.rs

@@ -9,7 +9,6 @@ use rustc_data_structures::unord::UnordSet;
 use rustc_infer::infer::DefineOpaqueTypes;
 use rustc_middle::ty::{Region, RegionVid};
 use tracing::debug;
-use ty::TypingMode;
 
 use super::*;
 use crate::errors::UnableToConstructConstantValue;
@@ -71,15 +70,15 @@ impl<'tcx> AutoTraitFinder<'tcx> {
     pub fn find_auto_trait_generics<A>(
         &self,
         ty: Ty<'tcx>,
-        orig_env: ty::ParamEnv<'tcx>,
+        typing_env: ty::TypingEnv<'tcx>,
         trait_did: DefId,
         mut auto_trait_callback: impl FnMut(AutoTraitInfo<'tcx>) -> A,
     ) -> AutoTraitResult<A> {
         let tcx = self.tcx;
 
         let trait_ref = ty::TraitRef::new(tcx, trait_did, [ty]);
 
-        let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
+        let (infcx, orig_env) = tcx.infer_ctxt().build_with_typing_env(typing_env);
         let mut selcx = SelectionContext::new(&infcx);
         for polarity in [ty::PredicatePolarity::Positive, ty::PredicatePolarity::Negative] {
             let result = selcx.select(&Obligation::new(
@@ -89,17 +88,13 @@ impl<'tcx> AutoTraitFinder<'tcx> {
                 ty::TraitPredicate { trait_ref, polarity },
             ));
             if let Ok(Some(ImplSource::UserDefined(_))) = result {
-                debug!(
-                    "find_auto_trait_generics({:?}): \
-                 manual impl found, bailing out",
-                    trait_ref
-                );
+                debug!("find_auto_trait_generics({trait_ref:?}): manual impl found, bailing out");
                 // If an explicit impl exists, it always takes priority over an auto impl
                 return AutoTraitResult::ExplicitImpl;
             }
         }
 
-        let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
+        let (infcx, orig_env) = tcx.infer_ctxt().build_with_typing_env(typing_env);
         let mut fresh_preds = FxIndexSet::default();
 
         // Due to the way projections are handled by SelectionContext, we need to run

src/librustdoc/clean/auto_trait.rs

@@ -21,7 +21,7 @@ pub(crate) fn synthesize_auto_trait_impls<'tcx>(
     item_def_id: DefId,
 ) -> Vec<clean::Item> {
     let tcx = cx.tcx;
-    let param_env = tcx.param_env(item_def_id);
+    let typing_env = ty::TypingEnv::non_body_analysis(tcx, item_def_id);
     let ty = tcx.type_of(item_def_id).instantiate_identity();
 
     let finder = auto_trait::AutoTraitFinder::new(tcx);
@@ -34,21 +34,21 @@ pub(crate) fn synthesize_auto_trait_impls<'tcx>(
                 cx,
                 ty,
                 trait_def_id,
-                param_env,
+                typing_env,
                 item_def_id,
                 &finder,
                 DiscardPositiveImpls::No,
             )
         })
         .collect();
     // We are only interested in case the type *doesn't* implement the `Sized` trait.
-    if !ty.is_sized(tcx, ty::TypingEnv::from_param_env(param_env))
+    if !ty.is_sized(tcx, typing_env)
         && let Some(sized_trait_def_id) = tcx.lang_items().sized_trait()
         && let Some(impl_item) = synthesize_auto_trait_impl(
             cx,
             ty,
             sized_trait_def_id,
-            param_env,
+            typing_env,
             item_def_id,
             &finder,
             DiscardPositiveImpls::Yes,
@@ -64,7 +64,7 @@ fn synthesize_auto_trait_impl<'tcx>(
     cx: &mut DocContext<'tcx>,
     ty: Ty<'tcx>,
     trait_def_id: DefId,
-    param_env: ty::ParamEnv<'tcx>,
+    typing_env: ty::TypingEnv<'tcx>,
     item_def_id: DefId,
     finder: &auto_trait::AutoTraitFinder<'tcx>,
     discard_positive_impls: DiscardPositiveImpls,
@@ -76,7 +76,7 @@ fn synthesize_auto_trait_impl<'tcx>(
         return None;
     }
 
-    let result = finder.find_auto_trait_generics(ty, param_env, trait_def_id, |info| {
+    let result = finder.find_auto_trait_generics(ty, typing_env, trait_def_id, |info| {
         clean_param_env(cx, item_def_id, info.full_user_env, info.region_data, info.vid_to_region)
     });