Remove error rules

grammar.js

@@ -90,11 +90,11 @@ module.exports = grammar({
     preproc_ifdef: $ => seq(
       choice('#ifdef', '#ifndef'),
       $.identifier,
-      err(repeat(choice(
+      repeat(choice(
         $._preproc_statement,
         $.function_definition,
         $.declaration
-      ))),
+      )),
       optional($.preproc_else),
       '#endif'
     ),
@@ -120,12 +120,12 @@ module.exports = grammar({
     ),
 
     declaration: $ => seq(
-      err(seq(
-        optional($._declaration_specifiers),
-        $._type_specifier,
-        commaSep1(choice(
-          $._declarator,
-          $.init_declarator)))),
+      optional($._declaration_specifiers),
+      $._type_specifier,
+      commaSep1(choice(
+        $._declarator,
+        $.init_declarator
+      )),
       ';'
     ),
 
@@ -201,7 +201,11 @@ module.exports = grammar({
 
     compound_statement: $ => seq(
       '{',
-      err(repeat(choice($.declaration, $._empty_declaration, $._statement))),
+      repeat(choice(
+        $.declaration,
+        $._empty_declaration,
+        $._statement
+      )),
       '}'
     ),
 
@@ -427,7 +431,7 @@ module.exports = grammar({
       $.number_literal,
       $.string_literal,
       $.char_literal,
-      seq('(', err($._expression), ')')
+      seq('(', $._expression, ')')
     ),
 
     conditional_expression: $ => prec.right(PREC.CONDITIONAL, seq(

src/grammar.json

@@ -255,26 +255,23 @@
           "name": "identifier"
         },
         {
-          "type": "ERROR",
+          "type": "REPEAT",
           "content": {
-            "type": "REPEAT",
-            "content": {
-              "type": "CHOICE",
-              "members": [
-                {
-                  "type": "SYMBOL",
-                  "name": "_preproc_statement"
-                },
-                {
-                  "type": "SYMBOL",
-                  "name": "function_definition"
-                },
-                {
-                  "type": "SYMBOL",
-                  "name": "declaration"
-                }
-              ]
-            }
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SYMBOL",
+                "name": "_preproc_statement"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "function_definition"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "declaration"
+              }
+            ]
           }
         },
         {
@@ -361,29 +358,46 @@
       "type": "SEQ",
       "members": [
         {
-          "type": "ERROR",
-          "content": {
-            "type": "SEQ",
-            "members": [
-              {
-                "type": "CHOICE",
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "_declaration_specifiers"
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "SYMBOL",
+          "name": "_type_specifier"
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "_declarator"
+                },
+                {
+                  "type": "SYMBOL",
+                  "name": "init_declarator"
+                }
+              ]
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SEQ",
                 "members": [
                   {
-                    "type": "SYMBOL",
-                    "name": "_declaration_specifiers"
+                    "type": "STRING",
+                    "value": ","
                   },
-                  {
-                    "type": "BLANK"
-                  }
-                ]
-              },
-              {
-                "type": "SYMBOL",
-                "name": "_type_specifier"
-              },
-              {
-                "type": "SEQ",
-                "members": [
                   {
                     "type": "CHOICE",
                     "members": [
@@ -396,36 +410,11 @@
                         "name": "init_declarator"
                       }
                     ]
-                  },
-                  {
-                    "type": "REPEAT",
-                    "content": {
-                      "type": "SEQ",
-                      "members": [
-                        {
-                          "type": "STRING",
-                          "value": ","
-                        },
-                        {
-                          "type": "CHOICE",
-                          "members": [
-                            {
-                              "type": "SYMBOL",
-                              "name": "_declarator"
-                            },
-                            {
-                              "type": "SYMBOL",
-                              "name": "init_declarator"
-                            }
-                          ]
-                        }
-                      ]
-                    }
                   }
                 ]
               }
-            ]
-          }
+            }
+          ]
         },
         {
           "type": "STRING",
@@ -835,26 +824,23 @@
           "value": "{"
         },
         {
-          "type": "ERROR",
+          "type": "REPEAT",
           "content": {
-            "type": "REPEAT",
-            "content": {
-              "type": "CHOICE",
-              "members": [
-                {
-                  "type": "SYMBOL",
-                  "name": "declaration"
-                },
-                {
-                  "type": "SYMBOL",
-                  "name": "_empty_declaration"
-                },
-                {
-                  "type": "SYMBOL",
-                  "name": "_statement"
-                }
-              ]
-            }
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SYMBOL",
+                "name": "declaration"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_empty_declaration"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_statement"
+              }
+            ]
           }
         },
         {
@@ -1851,11 +1837,8 @@
               "value": "("
             },
             {
-              "type": "ERROR",
-              "content": {
-                "type": "SYMBOL",
-                "name": "_expression"
-              }
+              "type": "SYMBOL",
+              "name": "_expression"
             },
             {
               "type": "STRING",