Remove a `Span` from `TokenKind::Interpolated`.

This span records the declaration of the metavariable in the LHS of the macro.
It's used in a couple of error messages. Unfortunately, it gets in the way of
the long-term goal of removing `TokenKind::Interpolated`. So this commit
removes it, which degrades a couple of (obscure) error messages but makes
things simpler and enables the next commit.

1 files changed, 3 insertions, 8 deletions

diff --git a/compiler/rustc_expand/src/mbe/macro_parser.rs b/compiler/rustc_expand/src/mbe/macro_parser.rs
index ffb50f4c92e..27cf6fee702 100644
--- a/compiler/rustc_expand/src/mbe/macro_parser.rs
+++ b/compiler/rustc_expand/src/mbe/macro_parser.rs
@@ -75,10 +75,9 @@ pub(crate) use ParseResult::*;
 
 use crate::mbe::{macro_rules::Tracker, KleeneOp, TokenTree};
 
-use rustc_ast::token::{self, DocComment, Nonterminal, NonterminalKind, Token};
+use rustc_ast::token::{self, DocComment, NonterminalKind, Token};
 use rustc_ast_pretty::pprust;
 use rustc_data_structures::fx::FxHashMap;
-use rustc_data_structures::sync::Lrc;
 use rustc_errors::ErrorGuaranteed;
 use rustc_lint_defs::pluralize;
 use rustc_parse::parser::{ParseNtResult, Parser};
@@ -392,7 +391,7 @@ pub(super) fn count_metavar_decls(matcher: &[TokenTree]) -> usize {
 #[derive(Debug, Clone)]
 pub(crate) enum NamedMatch {
     MatchedSeq(Vec<NamedMatch>),
-    MatchedSingle(ParseNtResult<Lrc<(Nonterminal, Span)>>),
+    MatchedSingle(ParseNtResult),
 }
 
 /// Performs a token equality check, ignoring syntax context (that is, an unhygienic comparison)
@@ -686,11 +685,7 @@ impl TtParser {
                             }
                             Ok(nt) => nt,
                         };
-                        mp.push_match(
-                            next_metavar,
-                            seq_depth,
-                            MatchedSingle(nt.map_nt(|nt| (Lrc::new((nt, span))))),
-                        );
+                        mp.push_match(next_metavar, seq_depth, MatchedSingle(nt));
                         mp.idx += 1;
                     } else {
                         unreachable!()