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interfaces: mark a few dirstate methods abstract...
interfaces: mark a few dirstate methods abstract I'm not sure what's going on here, but when enabling pytype checking on this package, it spits out the following errors: File "/mnt/c/Users/Matt/hg/mercurial/interfaces/dirstate.py", line 136, in changing_parents: bad return type [bad-return-type] Expected: Iterator Actually returned: None Attributes of protocol Iterator are not implemented on None: __next__ File "/mnt/c/Users/Matt/hg/mercurial/interfaces/dirstate.py", line 145, in changing_files: bad return type [bad-return-type] Expected: Iterator Actually returned: None Attributes of protocol Iterator are not implemented on None: __next__ I guess technically that's true, because these methods only have a doc comment, and don't explicitly return something or unconditionally raise an error. The strange thing is that both before and after this change, the *.pyi file that is generated is unchanged, and contains: def changing_files(self, repo) -> contextlib._GeneratorContextManager: ... def changing_parents(self, repo) -> contextlib._GeneratorContextManager: ... I'm not sure if the `@abstractmethod` should be the most inner or most outer decoration. We'll roll the dice with being the innermost, because that's how `@abstractproperty` says it should be used in conjunction with `@property`. We should probably make all of the methods without an actual body abstract, like was done for some `mercurial.wireprototypes` classes in fd200f5bcaea. But let's hold off for now and do that enmass later.

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