Fix mutable nested record

CHANGELOG.md

@@ -37,6 +37,7 @@
 - Fix printer removing private for empty record. https://github.com/rescript-lang/rescript/pull/7448
 - Fix: handle dynamic imports with module aliases. https://github.com/rescript-lang/rescript/pull/7452
 - Fix missing unescaping when accessing prop with exotic name. https://github.com/rescript-lang/rescript/pull/7469
+- Fix syntax error with mutable nested record. https://github.com/rescript-lang/rescript/pull/7470
 
 #### :house: Internal
 

Example.res

@@ -0,0 +1,16 @@
+type foo = {bar: int}
+
+type a = {
+  k: {"x": int},
+  mutable f: int,
+  g: {
+    @as("ad") g1: int,
+    mutable g2: int
+  }
+}
+
+type b = {
+  ...foo,
+  mutable f: int,
+  g: string
+}

compiler/syntax/src/res_core.ml

@@ -4228,8 +4228,9 @@ and parse_record_or_object_type ?current_type_name_path ?inline_types_context
       Asttypes.Closed
     | _ -> Asttypes.Closed
   in
-  match (p.token, inline_types_context, current_type_name_path) with
-  | Lident _, Some inline_types_context, Some current_type_name_path ->
+  match (inline_types_context, current_type_name_path) with
+  | Some inline_types_context, Some current_type_name_path
+    when Grammar.is_record_decl_start p.token ->
     let labels =
       parse_comma_delimited_region ~grammar:Grammar.RecordDecl ~closing:Rbrace
         ~f:

compiler/syntax/src/res_grammar.ml

@@ -195,7 +195,7 @@ let is_field_decl_start = function
   | _ -> false
 
 let is_record_decl_start = function
-  | Token.At | Mutable | Lident _ | DotDotDot | String _ -> true
+  | Token.At | Mutable | Lident _ | DotDotDot -> true
   | _ -> false
 
 let is_typ_expr_start = function

tests/tests/src/nested_records_with_type_params.mjs

@@ -3,6 +3,9 @@
 
 let options = {
   extra: {
+    extraField: {
+      theField: true
+    },
     name: "test",
     superExtra: {
       age: 2222
@@ -18,6 +21,9 @@ let options = {
 
 let opts2 = {
   extra: {
+    extraField: {
+      theField: true
+    },
     name: "test",
     superExtra: {
       age: "1234"

tests/tests/src/nested_records_with_type_params.res

@@ -1,5 +1,6 @@
 type options<'age> = {
   extra?: {
+    mutable extraField: {theField: bool},
     name: string,
     superExtra?: {age: 'age},
     otherExtra: option<{test: bool, anotherInlined: {record: bool}}>,
@@ -8,6 +9,7 @@ type options<'age> = {
 
 let options = {
   extra: {
+    extraField: {theField: true},
     name: "test",
     superExtra: {
       age: 2222,
@@ -18,6 +20,7 @@ let options = {
 
 let opts2: options<string> = {
   extra: {
+    extraField: {theField: true},
     name: "test",
     superExtra: {
       age: "1234",