C++17.h: forward -> c10::guts::forward (#18492)
Summary:
Use c10::guts::forward instead of forward
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18492
Reviewed By: smessmer
Differential Revision: D14625513
Pulled By: ilia-cher
fbshipit-source-id: 8bc4e20f102fe2a107a22f3e172882d60b95ab0e
