Rename make_unclosed_delims_error and return Vec<Diag>

Signed-off-by: xizheyin <[email protected]>

Author: xizheyin

compiler/rustc_parse/src/lexer/diagnostics.rs

@@ -126,23 +126,29 @@ 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)
+pub(crate) fn make_errors_for_mismatched_closing_delims<'psess>(
+    unmatcheds: &[UnmatchedDelim],
+    psess: &'psess ParseSess,
+) -> Vec<Diag<'psess>> {
+    unmatcheds
+        .iter()
+        .filter_map(|unmatched| {
+            // `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)
+        })
+        .collect()
 }

compiler/rustc_parse/src/lexer/mod.rs

@@ -1,4 +1,4 @@
-use diagnostics::make_unclosed_delims_error;
+use diagnostics::make_errors_for_mismatched_closing_delims;
 use rustc_ast::ast::{self, AttrStyle};
 use rustc_ast::token::{self, CommentKind, Delimiter, IdentIsRaw, Token, TokenKind};
 use rustc_ast::tokenstream::TokenStream;
@@ -71,27 +71,23 @@ pub(crate) fn lex_token_trees<'psess, 'src>(
     };
     let res = lexer.lex_token_trees(/* is_delimited */ false);
 
-    let mut unmatched_delims: Vec<_> = lexer
-        .diag_info
-        .unmatched_delims
-        .into_iter()
-        .filter_map(|unmatched_delim| make_unclosed_delims_error(unmatched_delim, psess))
-        .collect();
+    let mut unmatched_closing_delims: Vec<_> =
+        make_errors_for_mismatched_closing_delims(&lexer.diag_info.unmatched_delims, psess);
 
     match res {
         Ok((_open_spacing, stream)) => {
-            if unmatched_delims.is_empty() {
+            if unmatched_closing_delims.is_empty() {
                 Ok(stream)
             } else {
                 // Return error if there are unmatched delimiters or unclosed delimiters.
-                Err(unmatched_delims)
+                Err(unmatched_closing_delims)
             }
         }
         Err(errs) => {
             // We emit delimiter mismatch errors first, then emit the unclosing delimiter mismatch
             // because the delimiter mismatch is more likely to be the root cause of error
-            unmatched_delims.extend(errs);
-            Err(unmatched_delims)
+            unmatched_closing_delims.extend(errs);
+            Err(unmatched_closing_delims)
         }
     }
 }