Misc improvements

compiler/rustc_ast/src/token.rs

@@ -229,35 +229,61 @@ fn ident_can_begin_type(name: Symbol, span: Span, is_raw: bool) -> bool {
 #[derive(PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
 pub enum TokenKind {
     /* Expression-operator symbols. */
+    /// `=`
     Eq,
+    /// `<`
     Lt,
+    /// `<=`
     Le,
+    /// `==`
     EqEq,
+    /// `!=`
     Ne,
+    /// `>`
     Ge,
+    /// `>=`
     Gt,
+    /// `&&`
     AndAnd,
+    /// `||`
     OrOr,
+    /// `!`
     Not,
+    /// `~`
     Tilde,
     BinOp(BinOpToken),
     BinOpEq(BinOpToken),
 
     /* Structural symbols */
+    /// `@`
     At,
+    /// `.`
     Dot,
+    /// `..`
     DotDot,
+    /// `...`
     DotDotDot,
+    /// `..=`
     DotDotEq,
+    /// `,`
     Comma,
+    /// `;`
     Semi,
+    /// `:`
     Colon,
+    /// `::`
     ModSep,
+    /// `->`
     RArrow,
+    /// `<-`
     LArrow,
+    /// `=>`
     FatArrow,
+    /// `#`
     Pound,
+    /// `$`
     Dollar,
+    /// `?`
     Question,
     /// Used by proc macros for representing lifetimes, not generated by lexer right now.
     SingleQuote,
@@ -296,6 +322,7 @@ pub enum TokenKind {
     /// similarly to symbols in string literal tokens.
     DocComment(CommentKind, ast::AttrStyle, Symbol),
 
+    /// End Of File
     Eof,
 }
 

compiler/rustc_builtin_macros/src/lib.rs

@@ -71,33 +71,35 @@ pub fn register_builtin_macros(resolver: &mut dyn ResolverExpand) {
     }
 
     register_bang! {
+        // tidy-alphabetical-start
         asm: asm::expand_asm,
         assert: assert::expand_assert,
         cfg: cfg::expand_cfg,
         column: source_util::expand_column,
         compile_error: compile_error::expand_compile_error,
+        concat: concat::expand_concat,
         concat_bytes: concat_bytes::expand_concat_bytes,
         concat_idents: concat_idents::expand_concat_idents,
-        concat: concat::expand_concat,
+        const_format_args: format::expand_format_args,
+        core_panic: edition_panic::expand_panic,
         env: env::expand_env,
         file: source_util::expand_file,
-        format_args_nl: format::expand_format_args_nl,
         format_args: format::expand_format_args,
-        const_format_args: format::expand_format_args,
+        format_args_nl: format::expand_format_args_nl,
         global_asm: asm::expand_global_asm,
+        include: source_util::expand_include,
         include_bytes: source_util::expand_include_bytes,
         include_str: source_util::expand_include_str,
-        include: source_util::expand_include,
         line: source_util::expand_line,
         log_syntax: log_syntax::expand_log_syntax,
         module_path: source_util::expand_mod,
         option_env: env::expand_option_env,
-        core_panic: edition_panic::expand_panic,
         std_panic: edition_panic::expand_panic,
-        unreachable: edition_panic::expand_unreachable,
         stringify: source_util::expand_stringify,
         trace_macros: trace_macros::expand_trace_macros,
         type_ascribe: type_ascribe::expand_type_ascribe,
+        unreachable: edition_panic::expand_unreachable,
+        // tidy-alphabetical-end
     }
 
     register_attr! {