New submission from STINNER Victor: Currently, symtable_visit_expr() has browse into the AST tree to look up yield, yield from or await to check if a function is a generator or a coroutine. If we choose to start to work on AST optimizers, I would suggest to add an attribute to ast.FunctionDef to announce if a function is a generator or a coroutine.
Currently, the peephole optimizer is unable to remove the deadcode, because otherwise the function is no more detected as a generator: def generator(): if 0: yield # "hack" to get a generator pass By the way, it would be nice to add a keyword similar to "async def" to be able to explicitly "document" generators as generators, and avoid the "if 0: yield" hack, but that's a different topic ;-) I feel less confortable to modify the Python language. ---------- components: Interpreter Core messages: 287216 nosy: haypo, inada.naoki, yselivanov priority: normal severity: normal status: open title: AST: add an attribute to FunctionDef to distinguish functions from generators and coroutines type: enhancement versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29471> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
