[Octave-bug-tracker] [bug #46459] Interpreter allows number assignment to "end" key word within array brackets

[Lachlan Andrew]

Follow-up Comment #8, bug #46459 (project octave):

Thanks for taking charge of this, jwe.

I think the code already checks that the LHS of an assignment is not a
keyword.  The hitch is that the code to check if something is a keyword has a
special case to ignore "end" in this context.


octave_base_lexer::is_keyword_token (const std::string& s)
...
case end_kw:
  if (inside_any_object_index ()
      || (defining_func
          && ! (looking_at_return_list
                || parsed_function_name.top ())))
    {
      at_beginning_of_statement = previous_at_bos;
      return 0;
    }


(When I made the comment about performance, I hadn't realised that the parser
replaces all variable names with references to the particular symbol object; I
assumed the identifier strings were processed at runtime.)

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