level3-Additions.lark

command:+= assign_list | add | remove > error_invalid   
_print_argument: (_SPACE | list_access | textwithoutspaces | punctuation)*

assign: var _SPACE _IS _SPACE (list_access | text) -> assign
assign_list: var _SPACE _IS _SPACE text_list (_COMMA text_list)+
text_list: /([^\r\n,،]+)/ -> text // list elements may contain punctuation but not commas or course, these are separators

list_access: var _SPACE _AT _SPACE (INT | random) -> list_access //todo: could be merged with list_access_var?
turtle: _FORWARD (_SPACE (INT | list_access | textwithoutspaces))? -> forward | _TURN (_SPACE (list_access | textwithoutspaces))? -> turn

// FH, jan 22: not exactly sure why this works, while textwithoutspaces parses the whole line in add/remove
// leaving this for now
some_spaces : /([^\r\n!?. ]+)/ (_SPACE /([^\r\n!?. ]+)/)* -> text_with_spaces

add: _ADD_LIST _SPACE some_spaces _SPACE _TO_LIST _SPACE var
remove: _REMOVE _SPACE some_spaces _SPACE _FROM _SPACE var