[PATCH] D123576: Support constructing empty function_ref from other callables that can be "empty"

[Mehdi AMINI via Phabricator via llvm-commits]

mehdi_amini added a comment.

How do you see the list declared?
I mean we can list std::function because we include the header, but would you / could you forward déclaré absl, folly, boost, etc. equivalent here? I feel I missed something?

By the way an alternative it to do what absl does and remove the Boolean operator and force llvm::function_ref to always wrap something “non null” on construction


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D123576/new/

https://reviews.llvm.org/D123576