Well, I finally ran into a Python Unicode problem, sort of

[Lawrence D’Oliveiro]

On Monday, July 4, 2016 at 12:17:47 PM UTC+12, BartC wrote:
>
> On 04/07/2016 01:00, Lawrence D’Oliveiro wrote:
>>
>> On Monday, July 4, 2016 at 11:47:26 AM UTC+12, eryk sun wrote:
>>>
>>> Python lacks a mechanism to add user-defined operators. (R has this
>>> capability.) Maybe this feature could be added.
>>
>> That would be neat. But remember, you would have to define the operator
>> precedence as well. So you could no longer use a recursive-descent parser.
> 
> That wouldn't be a problem provided the new operator symbol and its 
> precedence is known at a compile time, and defined before use.

That is how it is normally done. (E.g. Algol 68.)

But you still couldn’t use a recursive-descent parser.