Move make_unclosed_delims_error to lexer/diagonostics.rs

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>

compiler/rustc_parse/src/lexer/diagnostics.rs

@@ -1,9 +1,12 @@
 use rustc_ast::token::Delimiter;
 use rustc_errors::Diag;
+use rustc_session::parse::ParseSess;
 use rustc_span::Span;
 use rustc_span::source_map::SourceMap;
 
 use super::UnmatchedDelim;
+use crate::errors::MismatchedClosingDelimiter;
+use crate::pprust;
 
 #[derive(Default)]
 pub(super) struct TokenTreeDiagInfo {
@@ -116,3 +119,24 @@ pub(super) fn report_suspicious_mismatch_block(
         }
     }
 }
+
+pub(crate) fn make_unclosed_delims_error(
+    unmatched: UnmatchedDelim,
+    psess: &ParseSess,
+) -> Option<Diag<'_>> {
+    // `None` here means an `Eof` was found. We already emit those errors elsewhere, we add them to
+    // `unmatched_delims` only for error recovery in the `Parser`.
+    let found_delim = unmatched.found_delim?;
+    let mut spans = vec![unmatched.found_span];
+    if let Some(sp) = unmatched.unclosed_span {
+        spans.push(sp);
+    };
+    let err = psess.dcx().create_err(MismatchedClosingDelimiter {
+        spans,
+        delimiter: pprust::token_kind_to_string(&found_delim.as_close_token_kind()).to_string(),
+        unmatched: unmatched.found_span,
+        opening_candidate: unmatched.candidate_span,
+        unclosed: unmatched.unclosed_span,
+    });
+    Some(err)
+}

compiler/rustc_parse/src/lexer/mod.rs

@@ -1,5 +1,6 @@
 use std::ops::Range;
 
+use diagnostics::make_unclosed_delims_error;
 use rustc_ast::ast::{self, AttrStyle};
 use rustc_ast::token::{self, CommentKind, Delimiter, IdentIsRaw, Token, TokenKind};
 use rustc_ast::tokenstream::TokenStream;
@@ -17,9 +18,9 @@ use rustc_session::parse::ParseSess;
 use rustc_span::{BytePos, Pos, Span, Symbol};
 use tracing::debug;
 
+use crate::errors;
 use crate::lexer::diagnostics::TokenTreeDiagInfo;
 use crate::lexer::unicode_chars::UNICODE_ARRAY;
-use crate::{errors, make_unclosed_delims_error};
 
 mod diagnostics;
 mod tokentrees;