message: vhdl: file_open_information: v87 support
diff: @@ -518,7 +518,9 @@ variable_declaration:
  file_declaration:
  KW_FILE identifier_list COLON subtype_indication ( file_open_information )? SEMI
  ;
  -file_open_information: ( KW_OPEN expression )? KW_IS file_logical_name;
  +file_open_information: ( KW_OPEN expression )? KW_IS
  + (KW_IN | KW_OUT)? // v87 only
  + file_logical_name;
  file_logical_name: expression;
  interface_declaration:
  interface_object_declaration
  