Add missing typedef

Author: kdkavanagh

cxxheaderparser/types.py

@@ -367,13 +367,16 @@ class Reference:
     """
 
     ref_to: typing.Union[Array, FunctionType, Pointer, Type]
+    restrict: bool = False
 
     def format(self) -> str:
         ref_to = self.ref_to
+
         if isinstance(ref_to, Array):
             return ref_to.format_decl("(&)")
         else:
-            return f"{ref_to.format()}&"
+            r = " __restrict__" if self.restrict else ""
+            return f"{ref_to.format()}& {r}"
 
     def format_decl(self, name: str):
         """Format as a named declaration"""
@@ -382,7 +385,8 @@ def format_decl(self, name: str):
         if isinstance(ref_to, Array):
             return ref_to.format_decl(f"(& {name})")
         else:
-            return f"{ref_to.format()}& {name}"
+            r = " __restrict__" if self.restrict else ""
+            return f"{ref_to.format()}& {r} {name}"
 
 
 @dataclass