Add specializations of __invoke_r for "callable"s of type cv-void
Add a bunch of tests for non-callable types
commit 011943a6e805a7666a7bff90ba27cd766bcc3a58 Author: Eric Fiselier <firstname.lastname@example.org> Date: Tue Jan 29 18:01:14 2019 +0000 Fix PR40495 - is_invokable_v<void> does not compile The meta-programming that attempted to form the invoke call expression was not in a SFINAE context. This made it a hard error to provide non-referencable types like 'void' or 'void (...) const'. This patch fixes the error by checking the validity of the call expression within a SFINAE context. llvm-svn: 352522
Commandeering to close.