Add some intra-doc links to compiler docs

compiler/rustc_builtin_macros/src/deriving/generic/mod.rs

@@ -257,7 +257,10 @@ pub struct Substructure<'a> {
     pub type_ident: Ident,
     /// ident of the method
     pub method_ident: Ident,
-    /// dereferenced access to any `Self_` or `Ptr(Self_, _)` arguments
+    /// dereferenced access to any [`Self_`] or [`Ptr(Self_, _)][ptr]` arguments
+    ///
+    /// [`Self_`]: ty::Ty::Self_
+    /// [ptr]: ty::Ty::Ptr
     pub self_args: &'a [P<Expr>],
     /// verbatim access to any other arguments
     pub nonself_args: &'a [P<Expr>],

compiler/rustc_interface/src/interface.rs

@@ -25,8 +25,9 @@
 pub type Result<T> = result::Result<T, ErrorReported>;
 
 /// Represents a compiler session.
+///
 /// Can be used to run `rustc_interface` queries.
-/// Created by passing `Config` to `run_compiler`.
+/// Created by passing [`Config`] to [`run_compiler`].
 pub struct Compiler {
     pub(crate) sess: Lrc<Session>,
     codegen_backend: Lrc<Box<dyn CodegenBackend>>,

compiler/rustc_interface/src/passes.rs

@@ -95,7 +95,7 @@ fn count_nodes(krate: &ast::Crate) -> usize {
 /// harness if one is to be provided, injection of a dependency on the
 /// standard library and prelude, and name resolution.
 ///
-/// Returns `None` if we're aborting after handling -W help.
+/// Returns [`None`] if we're aborting after handling -W help.
 pub fn configure_and_expand(
     sess: Lrc<Session>,
     lint_store: Lrc<LintStore>,

compiler/rustc_interface/src/queries.rs

@@ -23,7 +23,11 @@
 use std::rc::Rc;
 
 /// Represent the result of a query.
-/// This result can be stolen with the `take` method and generated with the `compute` method.
+///
+/// This result can be stolen with the [`take`] method and generated with the [`compute`] method.
+///
+/// [`take`]: Self::take
+/// [`compute`]: Self::compute
 pub struct Query<T> {
     result: RefCell<Option<Result<T>>>,
 }

compiler/rustc_span/src/symbol.rs

@@ -1681,7 +1681,7 @@ fn with_interner<T, F: FnOnce(&mut Interner) -> T>(f: F) -> T {
     SESSION_GLOBALS.with(|session_globals| f(&mut *session_globals.symbol_interner.lock()))
 }
 
-/// An alternative to `Symbol`, useful when the chars within the symbol need to
+/// An alternative to [`Symbol`], useful when the chars within the symbol need to
 /// be accessed. It deliberately has limited functionality and should only be
 /// used for temporary values.
 ///