On 2013-01-04, Chris Angelico <[email protected]> wrote:
> On Sat, Jan 5, 2013 at 5:09 AM, Grant Edwards <[email protected]> wrote:
>> The error messages are still pretty cryptic, so improving
>> that will add a few more lines. One nice thing about the ast code is
>> that it's simple to add code to allow C-like character constants such
>> that ('A' === 0x41). Here's the first pass at ast-based code:
>
> Looks cool, and fairly neat! Now I wonder, is it possible to use that
> to create new operators, such as the letter d? Binary operator, takes
> two integers...
I don't think you can define new operators. AFAICT, the
lexing/parsing is done using the built-in Python grammar. You can
control the behavior of the predefined operators and reject operators
you don't like, but you can't add new ones or change precedence/syntax
or anything like that.
If you want to tweak the grammar itself, then I think you need to use
something like pyparsing.
--
Grant Edwards grant.b.edwards Yow! I own seven-eighths of
at all the artists in downtown
gmail.com Burbank!
--
http://mail.python.org/mailman/listinfo/python-list
