Message307686
With the patch attached to this issue, @singledispatch gains support for passing the type in @register via annotations.
This looks more natural and enables more thorough type checking without repeating yourself:
@singledispatch
def generic(arg): ...
@generic.register
def _(arg: str): ...
@generic.register
def _(arg: int): ...
The previous API is still available for backwards compatibility, as well as stacking, and use with classes (sic, I was surprised to learn it's used that way, too).
The patch should be uncontroversial, maybe except for the fact that it's importing the `typing` module if annotations are used. This is necessary because of forward references, usage of None as a type, and so on. More importantly, with PEP 563 it's mandatory. |
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Date |
User |
Action |
Args |
2017-12-05 21:24:12 | lukasz.langa | set | recipients:
+ lukasz.langa, rhettinger, yselivanov |
2017-12-05 21:24:12 | lukasz.langa | set | messageid: <1512509052.55.0.213398074469.issue32227@psf.upfronthosting.co.za> |
2017-12-05 21:24:12 | lukasz.langa | link | issue32227 messages |
2017-12-05 21:24:12 | lukasz.langa | create | |
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