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. -- https://mail.python.org/mailman/listinfo/python-list
