Remove Type from rustdoc Const

src/librustdoc/clean/inline.rs

@@ -130,7 +130,10 @@ pub(crate) fn try_inline(
         }
         Res::Def(DefKind::Const, did) => {
             record_extern_fqn(cx, did, ItemType::Constant);
-            cx.with_param_env(did, |cx| clean::ConstantItem(build_const(cx, did)))
+            cx.with_param_env(did, |cx| {
+                let (generics, ty, ct) = build_const_item(cx, did);
+                clean::ConstantItem(generics, Box::new(ty), ct)
+            })
         }
         Res::Def(DefKind::Macro(kind), did) => {
             let is_doc_hidden = cx.tcx.is_doc_hidden(did)
@@ -717,21 +720,20 @@ pub(crate) fn print_inlined_const(tcx: TyCtxt<'_>, did: DefId) -> String {
     }
 }
 
-fn build_const(cx: &mut DocContext<'_>, def_id: DefId) -> clean::Constant {
+fn build_const_item(
+    cx: &mut DocContext<'_>,
+    def_id: DefId,
+) -> (clean::Generics, clean::Type, clean::Constant) {
     let mut generics =
         clean_ty_generics(cx, cx.tcx.generics_of(def_id), cx.tcx.explicit_predicates_of(def_id));
     clean::simplify::move_bounds_to_generic_parameters(&mut generics);
-
-    clean::Constant {
-        type_: Box::new(clean_middle_ty(
-            ty::Binder::dummy(cx.tcx.type_of(def_id).instantiate_identity()),
-            cx,
-            Some(def_id),
-            None,
-        )),
-        generics,
-        kind: clean::ConstantKind::Extern { def_id },
-    }
+    let ty = clean_middle_ty(
+        ty::Binder::dummy(cx.tcx.type_of(def_id).instantiate_identity()),
+        cx,
+        None,
+        None,
+    );
+    (generics, ty, clean::Constant { kind: clean::ConstantKind::Extern { def_id } })
 }
 
 fn build_static(cx: &mut DocContext<'_>, did: DefId, mutable: bool) -> clean::Static {

src/librustdoc/clean/mod.rs

@@ -283,31 +283,17 @@ fn clean_lifetime<'tcx>(lifetime: &hir::Lifetime, cx: &mut DocContext<'tcx>) ->
 
 pub(crate) fn clean_const<'tcx>(
     constant: &hir::ConstArg<'_>,
-    cx: &mut DocContext<'tcx>,
+    _cx: &mut DocContext<'tcx>,
 ) -> Constant {
-    let def_id = cx.tcx.hir().body_owner_def_id(constant.value.body).to_def_id();
-    Constant {
-        type_: Box::new(clean_middle_ty(
-            ty::Binder::dummy(cx.tcx.type_of(def_id).instantiate_identity()),
-            cx,
-            Some(def_id),
-            None,
-        )),
-        generics: Generics::default(),
-        kind: ConstantKind::Anonymous { body: constant.value.body },
-    }
+    Constant { kind: ConstantKind::Anonymous { body: constant.value.body } }
 }
 
 pub(crate) fn clean_middle_const<'tcx>(
     constant: ty::Binder<'tcx, ty::Const<'tcx>>,
-    cx: &mut DocContext<'tcx>,
+    _cx: &mut DocContext<'tcx>,
 ) -> Constant {
     // FIXME: instead of storing the stringified expression, store `self` directly instead.
-    Constant {
-        type_: Box::new(clean_middle_ty(constant.map_bound(|c| c.ty()), cx, None, None)),
-        generics: Generics::default(),
-        kind: ConstantKind::TyConst { expr: constant.skip_binder().to_string().into() },
-    }
+    Constant { kind: ConstantKind::TyConst { expr: constant.skip_binder().to_string().into() } }
 }
 
 pub(crate) fn clean_middle_region<'tcx>(region: ty::Region<'tcx>) -> Option<Lifetime> {
@@ -2738,11 +2724,11 @@ fn clean_maybe_renamed_item<'tcx>(
             ItemKind::Static(ty, mutability, body_id) => {
                 StaticItem(Static { type_: clean_ty(ty, cx), mutability, expr: Some(body_id) })
             }
-            ItemKind::Const(ty, generics, body_id) => ConstantItem(Constant {
-                type_: Box::new(clean_ty(ty, cx)),
-                generics: clean_generics(generics, cx),
-                kind: ConstantKind::Local { body: body_id, def_id },
-            }),
+            ItemKind::Const(ty, generics, body_id) => ConstantItem(
+                clean_generics(generics, cx),
+                Box::new(clean_ty(ty, cx)),
+                Constant { kind: ConstantKind::Local { body: body_id, def_id } },
+            ),
             ItemKind::OpaqueTy(ref ty) => OpaqueTyItem(OpaqueTy {
                 bounds: ty.bounds.iter().filter_map(|x| clean_generic_bound(x, cx)).collect(),
                 generics: clean_generics(ty.generics, cx),

src/librustdoc/clean/types.rs

@@ -830,7 +830,6 @@ pub(crate) enum ItemKind {
     TypeAliasItem(Box<TypeAlias>),
     OpaqueTyItem(OpaqueTy),
     StaticItem(Static),
-    ConstantItem(Constant),
     TraitItem(Box<Trait>),
     TraitAliasItem(TraitAlias),
     ImplItem(Box<Impl>),
@@ -853,6 +852,7 @@ pub(crate) enum ItemKind {
     PrimitiveItem(PrimitiveType),
     /// A required associated constant in a trait declaration.
     TyAssocConstItem(Generics, Box<Type>),
+    ConstantItem(Generics, Box<Type>, Constant),
     /// An associated constant in a trait impl or a provided one in a trait declaration.
     AssocConstItem(Generics, Box<Type>, ConstantKind),
     /// A required associated type in a trait declaration.
@@ -888,7 +888,7 @@ impl ItemKind {
             | TypeAliasItem(_)
             | OpaqueTyItem(_)
             | StaticItem(_)
-            | ConstantItem(_)
+            | ConstantItem(_, _, _)
             | TraitAliasItem(_)
             | TyMethodItem(_)
             | MethodItem(_, _)
@@ -922,7 +922,7 @@ impl ItemKind {
                 | TypeAliasItem(_)
                 | OpaqueTyItem(_)
                 | StaticItem(_)
-                | ConstantItem(_)
+                | ConstantItem(_, _, _)
                 | TraitAliasItem(_)
                 | ForeignFunctionItem(_)
                 | ForeignStaticItem(_)
@@ -2364,8 +2364,6 @@ pub(crate) struct Static {
 
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
 pub(crate) struct Constant {
-    pub(crate) type_: Box<Type>,
-    pub(crate) generics: Generics,
     pub(crate) kind: ConstantKind,
 }
 

src/librustdoc/clean/utils.rs

@@ -353,8 +353,8 @@ pub(crate) fn print_const(cx: &DocContext<'_>, n: ty::Const<'_>) -> String {
             s
         }
         // array lengths are obviously usize
-        ty::ConstKind::Value(ty::ValTree::Leaf(scalar))
-            if *n.ty().kind() == ty::Uint(ty::UintTy::Usize) =>
+        ty::ConstKind::Value(ty, ty::ValTree::Leaf(scalar))
+            if *ty.kind() == ty::Uint(ty::UintTy::Usize) =>
         {
             scalar.to_string()
         }

src/librustdoc/fold.rs

@@ -79,7 +79,7 @@ pub(crate) trait DocFolder: Sized {
             | FunctionItem(_)
             | OpaqueTyItem(_)
             | StaticItem(_)
-            | ConstantItem(_)
+            | ConstantItem(_, _, _)
             | TraitAliasItem(_)
             | TyMethodItem(_)
             | MethodItem(_, _)

src/librustdoc/html/render/print_item.rs

@@ -266,7 +266,7 @@ pub(super) fn print_item(cx: &mut Context<'_>, item: &clean::Item, buf: &mut Buf
         clean::ProcMacroItem(ref m) => item_proc_macro(buf, cx, item, m),
         clean::PrimitiveItem(_) => item_primitive(buf, cx, item),
         clean::StaticItem(ref i) | clean::ForeignStaticItem(ref i) => item_static(buf, cx, item, i),
-        clean::ConstantItem(ref c) => item_constant(buf, cx, item, c),
+        clean::ConstantItem(generics, ty, c) => item_constant(buf, cx, item, generics, ty, c),
         clean::ForeignTypeItem => item_foreign_type(buf, cx, item),
         clean::KeywordItem => item_keyword(buf, cx, item),
         clean::OpaqueTyItem(ref e) => item_opaque_ty(buf, cx, item, e),
@@ -1844,7 +1844,14 @@ fn item_primitive(w: &mut impl fmt::Write, cx: &mut Context<'_>, it: &clean::Ite
     }
 }
 
-fn item_constant(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, c: &clean::Constant) {
+fn item_constant(
+    w: &mut Buffer,
+    cx: &mut Context<'_>,
+    it: &clean::Item,
+    generics: &clean::Generics,
+    ty: &clean::Type,
+    c: &clean::Constant,
+) {
     wrap_item(w, |w| {
         let tcx = cx.tcx();
         render_attributes_in_code(w, it, cx);
@@ -1854,9 +1861,9 @@ fn item_constant(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, c: &cle
             "{vis}const {name}{generics}: {typ}{where_clause}",
             vis = visibility_print_with_space(it, cx),
             name = it.name.unwrap(),
-            generics = c.generics.print(cx),
-            typ = c.type_.print(cx),
-            where_clause = print_where_clause(&c.generics, cx, 0, Ending::NoNewline),
+            generics = generics.print(cx),
+            typ = ty.print(cx),
+            where_clause = print_where_clause(&generics, cx, 0, Ending::NoNewline),
         );
 
         // FIXME: The code below now prints

src/librustdoc/json/conversions.rs

@@ -183,7 +183,7 @@ impl FromWithTcx<clean::Constant> for Constant {
         let expr = constant.expr(tcx);
         let value = constant.value(tcx);
         let is_literal = constant.is_literal(tcx);
-        Constant { type_: (*constant.type_).into_tcx(tcx), expr, value, is_literal }
+        Constant { expr, value, is_literal }
     }
 }
 
@@ -321,7 +321,10 @@ fn from_clean_item(item: clean::Item, tcx: TyCtxt<'_>) -> ItemEnum {
         ForeignTypeItem => ItemEnum::ForeignType,
         TypeAliasItem(t) => ItemEnum::TypeAlias(t.into_tcx(tcx)),
         OpaqueTyItem(t) => ItemEnum::OpaqueTy(t.into_tcx(tcx)),
-        ConstantItem(c) => ItemEnum::Constant(c.into_tcx(tcx)),
+        // FIXME(generic_const_items): Add support for generic free consts
+        ConstantItem(_generics, t, c) => {
+            ItemEnum::Constant { type_: (*t).into_tcx(tcx), const_: c.into_tcx(tcx) }
+        }
         MacroItem(m) => ItemEnum::Macro(m.source),
         ProcMacroItem(m) => ItemEnum::ProcMacro(m.into_tcx(tcx)),
         PrimitiveItem(p) => {

src/librustdoc/json/mod.rs

@@ -186,7 +186,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 | types::ItemEnum::Impl(_)
                 | types::ItemEnum::TypeAlias(_)
                 | types::ItemEnum::OpaqueTy(_)
-                | types::ItemEnum::Constant(_)
+                | types::ItemEnum::Constant { .. }
                 | types::ItemEnum::Static(_)
                 | types::ItemEnum::ForeignType
                 | types::ItemEnum::Macro(_)

src/librustdoc/passes/check_doc_test_visibility.rs

@@ -62,7 +62,7 @@ pub(crate) fn should_have_doc_example(cx: &DocContext<'_>, item: &clean::Item) -
                 | clean::AssocTypeItem(..)
                 | clean::TypeAliasItem(_)
                 | clean::StaticItem(_)
-                | clean::ConstantItem(_)
+                | clean::ConstantItem(_, _, _)
                 | clean::ExternCrateItem { .. }
                 | clean::ImportItem(_)
                 | clean::PrimitiveItem(_)

src/librustdoc/visit.rs

@@ -28,7 +28,7 @@ pub(crate) trait DocVisitor: Sized {
             | TypeAliasItem(_)
             | OpaqueTyItem(_)
             | StaticItem(_)
-            | ConstantItem(_)
+            | ConstantItem(_, _, _)
             | TraitAliasItem(_)
             | TyMethodItem(_)
             | MethodItem(_, _)

src/rustdoc-json-types/lib.rs

@@ -8,7 +8,7 @@ use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 
 /// rustdoc format-version.
-pub const FORMAT_VERSION: u32 = 29;
+pub const FORMAT_VERSION: u32 = 30;
 
 /// A `Crate` is the root of the emitted JSON blob. It contains all type/documentation information
 /// about the language items in the local crate, as well as info about external items to allow
@@ -167,8 +167,6 @@ pub enum GenericArg {
 
 #[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct Constant {
-    #[serde(rename = "type")]
-    pub type_: Type,
     pub expr: String,
     pub value: Option<String>,
     pub is_literal: bool,
@@ -256,7 +254,12 @@ pub enum ItemEnum {
 
     TypeAlias(TypeAlias),
     OpaqueTy(OpaqueTy),
-    Constant(Constant),
+    Constant {
+        #[serde(rename = "type")]
+        type_: Type,
+        #[serde(rename = "const")]
+        const_: Constant,
+    },
 
     Static(Static),
 

src/tools/jsondoclint/src/item_kind.rs

@@ -150,7 +150,7 @@ impl Kind {
             ItemEnum::Impl(_) => Impl,
             ItemEnum::TypeAlias(_) => TypeAlias,
             ItemEnum::OpaqueTy(_) => OpaqueTy,
-            ItemEnum::Constant(_) => Constant,
+            ItemEnum::Constant { .. } => Constant,
             ItemEnum::Static(_) => Static,
             ItemEnum::Macro(_) => Macro,
             ItemEnum::ProcMacro(_) => ProcMacro,

src/tools/jsondoclint/src/validator.rs

@@ -101,7 +101,10 @@ impl<'a> Validator<'a> {
                 ItemEnum::Impl(x) => self.check_impl(x, id),
                 ItemEnum::TypeAlias(x) => self.check_type_alias(x),
                 ItemEnum::OpaqueTy(x) => self.check_opaque_ty(x),
-                ItemEnum::Constant(x) => self.check_constant(x),
+                ItemEnum::Constant { type_, const_ } => {
+                    self.check_type(type_);
+                    self.check_constant(const_);
+                }
                 ItemEnum::Static(x) => self.check_static(x),
                 ItemEnum::ForeignType => {} // nop
                 ItemEnum::Macro(x) => self.check_macro(x),
@@ -231,8 +234,8 @@ impl<'a> Validator<'a> {
         self.check_generics(&x.generics);
     }
 
-    fn check_constant(&mut self, x: &'a Constant) {
-        self.check_type(&x.type_);
+    fn check_constant(&mut self, _x: &'a Constant) {
+        // nop
     }
 
     fn check_static(&mut self, x: &'a Static) {