Steven D'Aprano wrote:
So what was the closure? If the surrounding function was still running, there was no need to capture the running environment in a closure?
You seem to be interpreting the word "closure" a bit differently from most people. It doesn't imply anything about whether a surrounding function is still running or not. A closure is just a piece of code together with a runtime environment. In typical Pascal implementations, a closure is represented by a (code_address, frame_pointer) pair, where the frame_pointer points to a chain of lexically enclosing stack frames. The language rules make it possible to manage the frames strictly stack-wise, which simplifies the memory management, but that doesn't make the closure any less of a closure. Contrast this with Modula-2, where only top-level functions can be passed as parameters. When you pass a function in Modula-2, only the code address is passed, with no environment pointer. -- Greg _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
