We could treat it as a kind of future statement. If there’s a top level statement that defines the magic identitier we generate the special bytecode.
On Wed, Dec 4, 2019 at 12:26 Brett Cannon <br...@python.org> wrote: > > > On Tue, Dec 3, 2019 at 5:58 PM Random832 <random...@fastmail.com> wrote: > >> On Tue, Dec 3, 2019, at 13:43, Brett Cannon wrote: >> > -1 from me. I can see someone not realizing an operator was changed, >> > assuming it's standard semantics, and then having things break subtly. >> > And debugging this wouldn't be fun either. To me this is monkeypatching >> > without an explicit need for it, i.e. if you really want different >> > semantics in your module then define a function and use that instead of >> > influence-at-a-distance overriding of syntax. >> >> Does it make a difference that it'd only apply to code that is physically >> in the same module where the function is defined? I'd originally planned to >> suggest full lexical scope for the lookup, in fact, so you could in theory >> do it within a single function. >> > > Not enough to change my opinion. Changing how fundamental operators work > just in a module is still influencing too far from the code site. For > instance, if I navigate in my editor directly into the middle of a file or > open a file and immediately start searching for the function I care about I > won't notice that "+" no longer means what I thought it meant for integers > because someone thought it would be smart to redefine that. > > And as Serhiy pointed out, performance is going to get slammed by this, no > opcode or not as you just introduced a new lookup on every syntactic > operation. > _______________________________________________ > 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/DXZO7UVMBXMV7KNBPZU25YA3PQLUI4NF/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- --Guido (mobile)
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