Perhaps you should take a look at Dlang. Using opDispatch and a with statement and compile time code generation, you may be able to accomplish what you’re trying to do entirely in D.
> On May 24, 2019, at 4:05 AM, Yanghao Hua <yanghao...@gmail.com> wrote: > >> On Fri, May 24, 2019 at 1:59 AM Steven D'Aprano <st...@pearwood.info> wrote: >> >>> On Thu, May 23, 2019 at 06:23:31PM +0200, Yanghao Hua wrote: >>> >>> Is this (<== and ==>) something can be made into CPython? >> >> If it goes into CPython, eventually every other Python needs to do the >> same. >> >> Of course it *could* be put into Python, but you haven't given >> sufficient justification for why it *should* be put into Python. >> >> Why does your DSL need a seperate assignment operator? How is it >> different from regular assignment? >> >> Could you use __setitem__ instead? >> >> Instead of this: >> >> variable <== thing # magic happens here >> >> can you write this? >> >> obj.variable = thing # magic happens here >> >> >> If your DSL is so different from Python that it needs new operators, >> perhaps you should write an interpreter for your language and run that >> seperately. >> >> code = """ >> any syntax you like <- thing >> """ >> result = interpret(code) > > Well, if python is not envisioned to be able to represent almost > everything elegantly maybe I should indeed walk away from this idea. > (This is sad for me ... I have been saying and believing python is > envisioned that way for more than 20 years now). Your argument could > be applied on PEP465 as well, where the only justification is to make > matrix operation prettier. I have explained the problem of use > descriptors in previous replies, where you cannot have a local signal, > e.g. obj.signal = thing # works, but local_signal = thing # doesn't > work. > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/5XE3WSGBJN6CTDNG55D3WUJD2BH2PUAC/ Code of Conduct: http://python.org/psf/codeofconduct/
