Push anonymous namespace into codegen, not template (#49498)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49498
In the near future, I want to code generate some functions that are
visible externally to this compilation unit. I cannot easily do this
if all the codegen code is wrapped in a global anonymous namespace,
so push the namespace in.
Registration has to stay in an anonymous namespace to avoid name conflicts.
This could also have been solved by making the wrapper functions have
more unique names but I didn't do this in the end.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: albanD, smessmer
Differential Revision: D25616104
Pulled By: ezyang
fbshipit-source-id: 323c0dda05a081502aab702f359a08dfac8c41a4
