Auto merge of #89203 - GuillaumeGomez:cleanup-rustdoc-types, r=camelid

Clean up clean/types.rs file by making the implementations follow the type declaration

This PR doesn't change anything, it simply moves things around: when reading the code, I realized a few times that a type declaration and implementations on it might be separated by some other type declarations, which makes the reading much more complicated. I put back impl and declaration together.

r? `@camelid`

src/librustdoc/clean/types.rs

@@ -908,18 +908,10 @@ impl<'a> FromIterator<&'a DocFragment> for String {
     }
 }
 
-/// The attributes on an [`Item`], including attributes like `#[derive(...)]` and `#[inline]`,
-/// as well as doc comments.
-#[derive(Clone, Debug, Default)]
-crate struct Attributes {
-    crate doc_strings: Vec<DocFragment>,
-    crate other_attrs: Vec<ast::Attribute>,
-}
-
-#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 /// A link that has not yet been rendered.
 ///
 /// This link will be turned into a rendered link by [`Item::links`].
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 crate struct ItemLink {
     /// The original link written in the markdown
     pub(crate) link: String,
@@ -944,6 +936,14 @@ pub struct RenderedLink {
     pub(crate) href: String,
 }
 
+/// The attributes on an [`Item`], including attributes like `#[derive(...)]` and `#[inline]`,
+/// as well as doc comments.
+#[derive(Clone, Debug, Default)]
+crate struct Attributes {
+    crate doc_strings: Vec<DocFragment>,
+    crate other_attrs: Vec<ast::Attribute>,
+}
+
 impl Attributes {
     crate fn lists(&self, name: Symbol) -> ListAttributesIter<'_> {
         self.other_attrs.lists(name)
@@ -1419,37 +1419,6 @@ crate enum Type {
     ImplTrait(Vec<GenericBound>),
 }
 
-#[derive(Clone, PartialEq, Eq, Hash, Copy, Debug)]
-/// N.B. this has to be different from `hir::PrimTy` because it also includes types that aren't
-/// paths, like `Unit`.
-crate enum PrimitiveType {
-    Isize,
-    I8,
-    I16,
-    I32,
-    I64,
-    I128,
-    Usize,
-    U8,
-    U16,
-    U32,
-    U64,
-    U128,
-    F32,
-    F64,
-    Char,
-    Bool,
-    Str,
-    Slice,
-    Array,
-    Tuple,
-    Unit,
-    RawPointer,
-    Reference,
-    Fn,
-    Never,
-}
-
 crate trait GetDefId {
     /// Use this method to get the [`DefId`] of a [`clean`] AST node.
     /// This will return [`None`] when called on a primitive [`clean::Type`].
@@ -1565,9 +1534,7 @@ impl Type {
         };
         Some((&self_, trait_did, *name))
     }
-}
 
-impl Type {
     fn inner_def_id(&self, cache: Option<&Cache>) -> Option<DefId> {
         let t: PrimitiveType = match *self {
             ResolvedPath { did, .. } => return Some(did),
@@ -1604,6 +1571,37 @@ impl GetDefId for Type {
     }
 }
 
+/// N.B. this has to be different from `hir::PrimTy` because it also includes types that aren't
+/// paths, like `Unit`.
+#[derive(Clone, PartialEq, Eq, Hash, Copy, Debug)]
+crate enum PrimitiveType {
+    Isize,
+    I8,
+    I16,
+    I32,
+    I64,
+    I128,
+    Usize,
+    U8,
+    U16,
+    U32,
+    U64,
+    U128,
+    F32,
+    F64,
+    Char,
+    Bool,
+    Str,
+    Slice,
+    Array,
+    Tuple,
+    Unit,
+    RawPointer,
+    Reference,
+    Fn,
+    Never,
+}
+
 impl PrimitiveType {
     crate fn from_hir(prim: hir::PrimTy) -> PrimitiveType {
         use ast::{FloatTy, IntTy, UintTy};