circle

The mod's post makes it pretty clear the primary reason for the removal is that the tweet (and reddit post title) implies the features are coming to C++, while in reality they're an extension actually coming to OP's compiler. That said, I think there's some nuance between GCC's extensions and Circle's extensions. GCC extensions are like "return the minimum of two numbers" (https://web.mit.edu/rhel-doc/3/rhel-gcc-en-3/c---extensions....), while Circle's extensions are more like "reflection in C++" (https://github.com/seanbaxter/circle/blob/master/reflection/...). GCC works with the existing C++ community and standards committees, while Circle's extensions are just the author implementing whatever random features they want. We can disagree about exactly where the line is when Circle diverges enough from C++ it deserves to be called a separa