Saar Raz

First commit of this PR a7139ecdbd087122b52b7d0e404c90ea780e3c9c adds the pdf file

I'm not sure if this is a bug on our side or not... Checking with caseycarter who added this macro originally.

Anyway the solution here is not to undefine __cpp_concepts but rather to set it to the correct value. In this specific case it wouldn't matter because libstdc++ simply checked for...

The auto parameter mechanism is going to be rewritten before the merge so I'm postponing this bug until then

Nice catch! Is this supposed to be well-formed though? Why would a requires-expression be allowed after that &?

gotcha

I don't know many flags but let's start with that reduced example

I'm merged against a year-old clang build currently