bpo-44653: Support typing.Union in parameter substitution of the union type#27232
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serhiy-storchaka wants to merge 1 commit intopython:mainfrom
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bpo-44653: Support typing.Union in parameter substitution of the union type#27232serhiy-storchaka wants to merge 1 commit intopython:mainfrom
serhiy-storchaka wants to merge 1 commit intopython:mainfrom
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LGTM but please see my message on the bpo. There is another bug in the substitution.
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| Support ``typing.Union`` in parameter substitution of the union type. | |||
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Maybe this is more specific:
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| Support ``typing.Union`` in parameter substitution of the union type. | |
| Flatten ``typing.Union`` during parameter substitution of the union type. |
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Is it better? Before this PR typing.Union was not supported at all.
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Hmm oh right I forgot. I think it's good to also mention that the arguments are flattened though, since none of the other types are treated like that. Some people might expect (int | T)[Union[str, int]] to become int | Union[str, int].
Suggested change
| Support ``typing.Union`` in parameter substitution of the union type. | |
| Support ``typing.Union`` in parameter substitution of the union type. | |
| Arguments in ``typing.Union`` are flattened and merged into the | |
| union type. |
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There is more general approach in #27247. |
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Closing in favor of GH-27247. |
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https://bugs.python.org/issue44653