Emit missing unclosed delimiter errors

src/librustc_metadata/cstore_impl.rs

@@ -439,8 +439,8 @@ impl cstore::CStore {
 
         let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body);
         let local_span = Span::new(source_file.start_pos, source_file.end_pos, NO_EXPANSION);
-        let (body, errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
-        emit_unclosed_delims(&errors, &sess.diagnostic());
+        let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
+        emit_unclosed_delims(&mut errors, &sess.diagnostic());
 
         // Mark the attrs as used
         let attrs = data.get_item_attrs(id.index, sess);

src/libsyntax/parse/parser.rs

@@ -7785,7 +7785,10 @@ impl<'a> Parser<'a> {
         attributes_allowed: bool,
     ) -> PResult<'a, Option<P<Item>>> {
         let (ret, tokens) = self.collect_tokens(|this| {
-            this.parse_item_implementation(attrs, macros_allowed, attributes_allowed)
+            let item = this.parse_item_implementation(attrs, macros_allowed, attributes_allowed);
+            let diag = this.diagnostic();
+            emit_unclosed_delims(&mut this.unclosed_delims, diag);
+            item
         })?;
 
         // Once we've parsed an item and recorded the tokens we got while
@@ -8532,8 +8535,8 @@ impl<'a> Parser<'a> {
             module: self.parse_mod_items(&token::Eof, lo)?,
             span: lo.to(self.span),
         });
-        emit_unclosed_delims(&self.unclosed_delims, self.diagnostic());
-        self.unclosed_delims.clear();
+        let diag = self.diagnostic();
+        emit_unclosed_delims(&mut self.unclosed_delims, diag);
         krate
     }
 
@@ -8564,8 +8567,8 @@ impl<'a> Parser<'a> {
     }
 }
 
-pub fn emit_unclosed_delims(unclosed_delims: &[UnmatchedBrace], handler: &errors::Handler) {
-    for unmatched in unclosed_delims {
+pub fn emit_unclosed_delims(unclosed_delims: &mut Vec<UnmatchedBrace>, handler: &errors::Handler) {
+    for unmatched in unclosed_delims.iter() {
         let mut err = handler.struct_span_err(unmatched.found_span, &format!(
             "incorrect close delimiter: `{}`",
             pprust::token_to_string(&token::Token::CloseDelim(unmatched.found_delim)),
@@ -8579,4 +8582,5 @@ pub fn emit_unclosed_delims(unclosed_delims: &[UnmatchedBrace], handler: &errors
         }
         err.emit();
     }
+    unclosed_delims.clear();
 }

src/libsyntax/parse/token.rs

@@ -675,9 +675,9 @@ impl Nonterminal {
         // FIXME(#43081): Avoid this pretty-print + reparse hack
         let source = pprust::nonterminal_to_string(self);
         let filename = FileName::macro_expansion_source_code(&source);
-        let (tokens_for_real, errors) =
+        let (tokens_for_real, mut errors) =
             parse_stream_from_source_str(filename, source, sess, Some(span));
-        emit_unclosed_delims(&errors, &sess.span_diagnostic);
+        emit_unclosed_delims(&mut errors, &sess.span_diagnostic);
 
         // During early phases of the compiler the AST could get modified
         // directly (e.g., attributes added or removed) and the internal cache
@@ -740,13 +740,13 @@ fn prepend_attrs(sess: &ParseSess,
         let source = pprust::attr_to_string(attr);
         let macro_filename = FileName::macro_expansion_source_code(&source);
         if attr.is_sugared_doc {
-            let (stream, errors) = parse_stream_from_source_str(
+            let (stream, mut errors) = parse_stream_from_source_str(
                 macro_filename,
                 source,
                 sess,
                 Some(span),
             );
-            emit_unclosed_delims(&errors, &sess.span_diagnostic);
+            emit_unclosed_delims(&mut errors, &sess.span_diagnostic);
             builder.push(stream);
             continue
         }
@@ -763,13 +763,13 @@ fn prepend_attrs(sess: &ParseSess,
         // ... and for more complicated paths, fall back to a reparse hack that
         // should eventually be removed.
         } else {
-            let (stream, errors) = parse_stream_from_source_str(
+            let (stream, mut errors) = parse_stream_from_source_str(
                 macro_filename,
                 source,
                 sess,
                 Some(span),
             );
-            emit_unclosed_delims(&errors, &sess.span_diagnostic);
+            emit_unclosed_delims(&mut errors, &sess.span_diagnostic);
             brackets.push(stream);
         }
 

src/libsyntax_ext/proc_macro_server.rs

@@ -410,13 +410,13 @@ impl server::TokenStream for Rustc<'_> {
         stream.is_empty()
     }
     fn from_str(&mut self, src: &str) -> Self::TokenStream {
-        let (tokens, errors) = parse::parse_stream_from_source_str(
+        let (tokens, mut errors) = parse::parse_stream_from_source_str(
             FileName::proc_macro_source_code(src.clone()),
             src.to_string(),
             self.sess,
             Some(self.call_site),
         );
-        emit_unclosed_delims(&errors, &self.sess.span_diagnostic);
+        emit_unclosed_delims(&mut errors, &self.sess.span_diagnostic);
         tokens
     }
     fn to_string(&mut self, stream: &Self::TokenStream) -> String {

src/test/ui/parser-recovery-2.stderr

@@ -1,9 +1,3 @@
-error: unexpected token: `;`
-  --> $DIR/parser-recovery-2.rs:12:15
-   |
-LL |     let x = y.;  //~ ERROR unexpected token
-   |               ^
-
 error: incorrect close delimiter: `)`
   --> $DIR/parser-recovery-2.rs:8:5
    |
@@ -13,6 +7,12 @@ LL |         let x = foo(); //~ ERROR cannot find function `foo` in this scope
 LL |     ) //~ ERROR incorrect close delimiter: `)`
    |     ^ incorrect close delimiter
 
+error: unexpected token: `;`
+  --> $DIR/parser-recovery-2.rs:12:15
+   |
+LL |     let x = y.;  //~ ERROR unexpected token
+   |               ^
+
 error[E0425]: cannot find function `foo` in this scope
   --> $DIR/parser-recovery-2.rs:7:17
    |

src/test/ui/resolve/token-error-correct-3.rs

@@ -10,16 +10,14 @@ pub mod raw {
     pub fn ensure_dir_exists<P: AsRef<Path>, F: FnOnce(&Path)>(path: P,
                                                                callback: F)
                                                                -> io::Result<bool> {
-        if !is_directory(path.as_ref()) { //~ ERROR: cannot find function `is_directory`
-            callback(path.as_ref(); //~ ERROR expected one of
-            fs::create_dir_all(path.as_ref()).map(|()| true) //~ ERROR: mismatched types
-            //~^ expected (), found enum `std::result::Result`
-            //~| expected type `()`
-            //~| found type `std::result::Result<bool, std::io::Error>`
-            //~| expected one of
+        if !is_directory(path.as_ref()) {
+            //~^ ERROR cannot find function `is_directory`
+            callback(path.as_ref();
+            //~^ ERROR expected one of
+            //~| ERROR this function takes 1 parameter but 2 parameters were supplied
+            fs::create_dir_all(path.as_ref()).map(|()| true)
         } else {
-            //~^ ERROR: expected one of
-            //~| unexpected token
+            //~^ ERROR incorrect close delimiter: `}`
             Ok(false);
         }
 

src/test/ui/resolve/token-error-correct-3.stderr

@@ -1,39 +1,38 @@
-error: expected one of `)`, `,`, `.`, `?`, or an operator, found `;`
-  --> $DIR/token-error-correct-3.rs:14:35
-   |
-LL |             callback(path.as_ref(); //~ ERROR expected one of
-   |                     -             ^
-   |                     |             |
-   |                     |             help: `)` may belong here
-   |                     unclosed delimiter
-
-error: expected one of `.`, `;`, `?`, `}`, or an operator, found `)`
-  --> $DIR/token-error-correct-3.rs:20:9
+error: incorrect close delimiter: `}`
+  --> $DIR/token-error-correct-3.rs:19:9
    |
-LL |             fs::create_dir_all(path.as_ref()).map(|()| true) //~ ERROR: mismatched types
-   |                                                             - expected one of `.`, `;`, `?`, `}`, or an operator here
+LL |         if !is_directory(path.as_ref()) {
+   |                                         - close delimiter possibly meant for this
+LL |             //~^ ERROR cannot find function `is_directory`
+LL |             callback(path.as_ref();
+   |                     - un-closed delimiter
 ...
 LL |         } else {
-   |         ^ unexpected token
+   |         ^ incorrect close delimiter
+
+error: expected one of `)`, `,`, `.`, `?`, or an operator, found `;`
+  --> $DIR/token-error-correct-3.rs:15:35
+   |
+LL |             callback(path.as_ref();
+   |                                   ^ expected one of `)`, `,`, `.`, `?`, or an operator here
 
 error[E0425]: cannot find function `is_directory` in this scope
   --> $DIR/token-error-correct-3.rs:13:13
    |
-LL |         if !is_directory(path.as_ref()) { //~ ERROR: cannot find function `is_directory`
+LL |         if !is_directory(path.as_ref()) {
    |             ^^^^^^^^^^^^ not found in this scope
 
-error[E0308]: mismatched types
+error[E0057]: this function takes 1 parameter but 2 parameters were supplied
   --> $DIR/token-error-correct-3.rs:15:13
    |
-LL |             fs::create_dir_all(path.as_ref()).map(|()| true) //~ ERROR: mismatched types
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^- help: try adding a semicolon: `;`
-   |             |
-   |             expected (), found enum `std::result::Result`
-   |
-   = note: expected type `()`
-              found type `std::result::Result<bool, std::io::Error>`
+LL | /             callback(path.as_ref();
+LL | |             //~^ ERROR expected one of
+LL | |             //~| ERROR this function takes 1 parameter but 2 parameters were supplied
+LL | |             fs::create_dir_all(path.as_ref()).map(|()| true)
+LL | |         } else {
+   | |_________^ expected 1 parameter
 
 error: aborting due to 4 previous errors
 
-Some errors occurred: E0308, E0425.
-For more information about an error, try `rustc --explain E0308`.
+Some errors occurred: E0057, E0425.
+For more information about an error, try `rustc --explain E0057`.