Remove desugar_doc_comments arg from Parser::new().

It's only true at one call site; do the desugaring there instead.

Author: nnethercote

compiler/rustc_expand/src/mbe/macro_rules.rs

@@ -249,7 +249,7 @@ fn expand_macro<'cx>(
  trace_macros_note(&mut cx.expansions, sp, msg);
  }
 
- let p = Parser::new(sess, tts, false, None);
+ let p = Parser::new(sess, tts, None);
 
  if is_local {
  cx.resolver.record_macro_rule_usage(node_id, i);
@@ -446,7 +446,7 @@ pub fn compile_declarative_macro(
 
  let create_parser = || {
  let body = macro_def.body.tokens.clone();
- Parser::new(&sess.parse_sess, body, false, rustc_parse::MACRO_ARGUMENTS)
+ Parser::new(&sess.parse_sess, body, rustc_parse::MACRO_ARGUMENTS)
  };
 
  let parser = create_parser();
@@ -1417,6 +1417,11 @@ fn quoted_tt_to_string(tt: &mbe::TokenTree) -> String {
  }
 }
 
-pub(super) fn parser_from_cx(sess: &ParseSess, tts: TokenStream, recovery: Recovery) -> Parser<'_> {
- Parser::new(sess, tts, true, rustc_parse::MACRO_ARGUMENTS).recovery(recovery)
+pub(super) fn parser_from_cx(
+ sess: &ParseSess,
+ mut tts: TokenStream,
+ recovery: Recovery,
+) -> Parser<'_> {
+ tts.desugar_doc_comments();
+ Parser::new(sess, tts, rustc_parse::MACRO_ARGUMENTS).recovery(recovery)
 }

compiler/rustc_parse/src/lib.rs

@@ -205,7 +205,7 @@ pub fn stream_to_parser<'a>(
  stream: TokenStream,
  subparser_name: Option<&'static str>,
 ) -> Parser<'a> {
- Parser::new(sess, stream, false, subparser_name)
+ Parser::new(sess, stream, subparser_name)
 }
 
 /// Runs the given subparser `f` on the tokens of the given `attr`'s item.
@@ -215,7 +215,7 @@ pub fn parse_in<'a, T>(
  name: &'static str,
  mut f: impl FnMut(&mut Parser<'a>) -> PResult<'a, T>,
 ) -> PResult<'a, T> {
- let mut parser = Parser::new(sess, tts, false, Some(name));
+ let mut parser = Parser::new(sess, tts, Some(name));
  let result = f(&mut parser)?;
  if parser.token != token::Eof {
  parser.unexpected()?;

compiler/rustc_parse/src/parser/mod.rs

@@ -388,14 +388,9 @@ pub(super) fn token_descr(token: &Token) -> String {
 impl<'a> Parser<'a> {
  pub fn new(
  sess: &'a ParseSess,
- mut stream: TokenStream,
- desugar_doc_comments: bool,
+ stream: TokenStream,
  subparser_name: Option<&'static str>,
  ) -> Self {
- if desugar_doc_comments {
- stream.desugar_doc_comments();
- }
-
  let mut parser = Parser {
  sess,
  token: Token::dummy(),