rustdoc: Use ty::ImplPolarity instead of custom enum

src/librustdoc/clean/auto_trait.rs

@@ -79,14 +79,14 @@ impl<'a, 'tcx> AutoTraitFinder<'a, 'tcx> {
         let polarity;
         let new_generics = match result {
             AutoTraitResult::PositiveImpl(new_generics) => {
-                polarity = ImplPolarity::Positive;
+                polarity = ty::ImplPolarity::Positive;
                 if discard_positive_impl {
                     return None;
                 }
                 new_generics
             }
             AutoTraitResult::NegativeImpl => {
-                polarity = ImplPolarity::Negative;
+                polarity = ty::ImplPolarity::Negative;
 
                 // For negative impls, we use the generic params, but *not* the predicates,
                 // from the original type. Otherwise, the displayed impl appears to be a

src/librustdoc/clean/blanket_impl.rs

@@ -123,7 +123,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
                             .in_definition_order()
                             .collect::<Vec<_>>()
                             .clean(self.cx),
-                        polarity: ImplPolarity::Positive,
+                        polarity: ty::ImplPolarity::Positive,
                         kind: ImplKind::Blanket(box trait_ref.self_ty().clean(self.cx)),
                     }),
                     cfg: None,

src/librustdoc/clean/inline.rs

@@ -497,7 +497,7 @@ crate fn build_impl(
             trait_,
             for_,
             items: trait_items,
-            polarity: polarity.clean(cx),
+            polarity,
             kind: ImplKind::Normal,
         }),
         box merged_attrs,

src/librustdoc/clean/mod.rs

@@ -1856,18 +1856,6 @@ impl Clean<Item> for hir::Variant<'_> {
     }
 }
 
-impl Clean<ImplPolarity> for ty::ImplPolarity {
-    /// Returns whether the impl has negative polarity.
-    fn clean(&self, _: &mut DocContext<'_>) -> ImplPolarity {
-        match self {
-            ty::ImplPolarity::Positive |
-            // FIXME: do we want to do something else here?
-            ty::ImplPolarity::Reservation => ImplPolarity::Positive,
-            ty::ImplPolarity::Negative => ImplPolarity::Negative,
-        }
-    }
-}
-
 fn clean_impl(impl_: &hir::Impl<'_>, hir_id: hir::HirId, cx: &mut DocContext<'_>) -> Vec<Item> {
     let tcx = cx.tcx;
     let mut ret = Vec::new();
@@ -1894,7 +1882,7 @@ fn clean_impl(impl_: &hir::Impl<'_>, hir_id: hir::HirId, cx: &mut DocContext<'_>
             trait_,
             for_,
             items,
-            polarity: tcx.impl_polarity(def_id).clean(cx),
+            polarity: tcx.impl_polarity(def_id),
             kind: ImplKind::Normal,
         });
         Item::from_hir_id_and_parts(hir_id, None, kind, cx)

src/librustdoc/clean/types.rs

@@ -2177,7 +2177,7 @@ crate struct Impl {
     crate trait_: Option<Path>,
     crate for_: Type,
     crate items: Vec<Item>,
-    crate polarity: ImplPolarity,
+    crate polarity: ty::ImplPolarity,
     crate kind: ImplKind,
 }
 
@@ -2227,13 +2227,6 @@ impl ImplKind {
     }
 }
 
-// FIXME: remove this and use ty::ImplPolarity instead
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
-crate enum ImplPolarity {
-    Positive,
-    Negative,
-}
-
 #[derive(Clone, Debug)]
 crate struct Import {
     crate kind: ImportKind,

src/librustdoc/html/format.rs

@@ -14,6 +14,7 @@ use rustc_data_structures::captures::Captures;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
 use rustc_hir::def_id::DefId;
+use rustc_middle::ty;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::def_id::CRATE_DEF_INDEX;
 use rustc_target::spec::abi::Abi;
@@ -991,8 +992,8 @@ impl clean::Impl {
 
             if let Some(ref ty) = self.trait_ {
                 match self.polarity {
-                    clean::ImplPolarity::Positive => {}
+                    ty::ImplPolarity::Positive | ty::ImplPolarity::Reservation => {}
-                    clean::ImplPolarity::Negative => write!(f, "!")?,
+                    ty::ImplPolarity::Negative => write!(f, "!")?,
                 }
                 fmt::Display::fmt(&ty.print(cx), f)?;
                 write!(f, " for ")?;

src/librustdoc/html/render/mod.rs

@@ -34,8 +34,8 @@ mod span_map;
 mod templates;
 mod write_shared;
 
-crate use context::*;
+crate use self::context::*;
-crate use span_map::{collect_spans_and_sources, LinkFromSrc};
+crate use self::span_map::{collect_spans_and_sources, LinkFromSrc};
 
 use std::collections::VecDeque;
 use std::default::Default;
@@ -54,6 +54,7 @@ use rustc_hir::def::CtorKind;
 use rustc_hir::def_id::DefId;
 use rustc_hir::Mutability;
 use rustc_middle::middle::stability;
+use rustc_middle::ty;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::{
     symbol::{kw, sym, Symbol},
@@ -2034,8 +2035,8 @@ fn sidebar_assoc_items(cx: &Context<'_>, out: &mut Buffer, it: &clean::Item) {
                             let out = Escape(&i_display);
                             let encoded = small_url_encode(format!("{:#}", i.print(cx)));
                             let prefix = match it.inner_impl().polarity {
-                                clean::ImplPolarity::Positive => "",
+                                ty::ImplPolarity::Positive | ty::ImplPolarity::Reservation => "",
-                                clean::ImplPolarity::Negative => "!",
+                                ty::ImplPolarity::Negative => "!",
                             };
                             let generated =
                                 format!("<a href=\"#impl-{}\">{}{}</a>", encoded, prefix, out);

src/librustdoc/json/conversions.rs

@@ -9,7 +9,7 @@ use std::fmt;
 
 use rustc_ast::ast;
 use rustc_hir::{def::CtorKind, def_id::DefId};
-use rustc_middle::ty::TyCtxt;
+use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::def_id::CRATE_DEF_INDEX;
 use rustc_span::Pos;
 
@@ -513,8 +513,8 @@ impl FromWithTcx<clean::Impl> for Impl {
             clean::ImplKind::Blanket(ty) => (false, Some(*ty)),
         };
         let negative_polarity = match polarity {
-            clean::ImplPolarity::Positive => false,
+            ty::ImplPolarity::Positive | ty::ImplPolarity::Reservation => false,
-            clean::ImplPolarity::Negative => true,
+            ty::ImplPolarity::Negative => true,
         };
         Impl {
             is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,