fix: Recover from = in record pattern field

Author: Veykril

crates/parser/src/grammar/expressions.rs

@@ -694,7 +694,7 @@ pub(crate) fn record_expr_field_list(p: &mut Parser<'_>) {
                     //     S { field ..S::default() }
                     // }
                     name_ref_or_index(p);
-                    p.error("expected colon");
+                    p.error("expected `:`");
                 } else {
                     // test_err record_literal_field_eq_recovery
                     // fn main() {
@@ -705,7 +705,7 @@ pub(crate) fn record_expr_field_list(p: &mut Parser<'_>) {
                         p.bump(T![:]);
                     } else if p.nth_at(1, T![=]) {
                         name_ref_or_index(p);
-                        p.err_and_bump("expected colon");
+                        p.err_and_bump("expected `:`");
                     }
                     expr(p);
                 }

crates/parser/src/grammar/patterns.rs

@@ -323,6 +323,15 @@ fn record_pat_field(p: &mut Parser<'_>) {
             p.bump(T![:]);
             pattern(p);
         }
+        // test_err record_pat_field_eq_recovery
+        // fn main() {
+        //     let S { field = foo };
+        // }
+        IDENT | INT_NUMBER if p.nth(1) == T![=] => {
+            name_ref_or_index(p);
+            p.err_and_bump("expected `:`");
+            pattern(p);
+        }
         T![box] => {
             // FIXME: not all box patterns should be allowed
             box_pat(p);

crates/parser/test_data/parser/inline/err/0014_record_literal_before_ellipsis_recovery.rast

@@ -45,5 +45,5 @@ SOURCE_FILE
         WHITESPACE "\n"
         R_CURLY "}"
   WHITESPACE "\n"
-error 25: expected colon
+error 25: expected `:`
 error 25: expected COMMA

crates/parser/test_data/parser/inline/err/0032_record_literal_field_eq_recovery.rast

@@ -38,4 +38,4 @@ SOURCE_FILE
         WHITESPACE "\n"
         R_CURLY "}"
   WHITESPACE "\n"
-error 26: expected colon
+error 26: expected `:`

crates/parser/test_data/parser/inline/err/0033_record_pat_field_eq_recovery.rast

@@ -0,0 +1,43 @@
+SOURCE_FILE
+  FN
+    FN_KW "fn"
+    WHITESPACE " "
+    NAME
+      IDENT "main"
+    PARAM_LIST
+      L_PAREN "("
+      R_PAREN ")"
+    WHITESPACE " "
+    BLOCK_EXPR
+      STMT_LIST
+        L_CURLY "{"
+        WHITESPACE "\n    "
+        LET_STMT
+          LET_KW "let"
+          WHITESPACE " "
+          RECORD_PAT
+            PATH
+              PATH_SEGMENT
+                NAME_REF
+                  IDENT "S"
+            WHITESPACE " "
+            RECORD_PAT_FIELD_LIST
+              L_CURLY "{"
+              WHITESPACE " "
+              RECORD_PAT_FIELD
+                NAME_REF
+                  IDENT "field"
+                WHITESPACE " "
+                ERROR
+                  EQ "="
+                WHITESPACE " "
+                IDENT_PAT
+                  NAME
+                    IDENT "foo"
+              WHITESPACE " "
+              R_CURLY "}"
+          SEMICOLON ";"
+        WHITESPACE "\n"
+        R_CURLY "}"
+  WHITESPACE "\n"
+error 30: expected `:`

crates/parser/test_data/parser/inline/err/0033_record_pat_field_eq_recovery.rs

@@ -0,0 +1,3 @@
+fn main() {
+    let S { field = foo };
+}