add a new option to json_file constructor

If nullify_pointer is False, the pointer is not nullified Fixes #564
jacobwilliams · Jun 1, 2024 · 764f89b · 764f89b
1 parent c19763f
commit 764f89b
Showing 1 changed file with 9 additions and 2 deletions.
diff --git a/src/json_file_module.F90 b/src/json_file_module.F90
@@ -569,7 +569,8 @@ end subroutine get_json_core_in_file
 
     function initialize_json_file(p,&
 #include "json_initialize_dummy_arguments.inc"
-                                 ) result(file_object)
+                                  , nullify_pointer &
+                                  ) result(file_object)
 
     implicit none
 
@@ -578,6 +579,8 @@ function initialize_json_file(p,&
                                             !! as a `json_file` object. This
                                             !! will be nullified.
 #include "json_initialize_arguments.inc"
+    logical(LK),intent(in),optional :: nullify_pointer !! if True, then `p` will be nullified
+                                                       !! if present. (default is True)
 
     call file_object%initialize(&
 #include "json_initialize_dummy_arguments.inc"
@@ -588,7 +591,11 @@ function initialize_json_file(p,&
         ! we have to nullify it to avoid
         ! a dangling pointer when the file
         ! goes out of scope
-        nullify(p)
+        if (present(nullify_pointer)) then
+            if (nullify_pointer) nullify(p)
+        else
+            nullify(p)
+        end if
     end if
 
     end function initialize_json_file