Ken Jin <[email protected]> added the comment:
ForwardRef is for internal use, and writing ForwardRef('fdsa') is discouraged,
as the docs say:
This class should not be instantiated by a user.
However, I don't see any cons from adding union support, so let's do it!
Note that a workaround exists for OP's example. But it may not be sufficient
for complex runtime libraries:
ForwardRef('asdf | fdsa')
----------
stage: patch review ->
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<https://bugs.python.org/issue45489>
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