Top "Language-extension" questions

This tag is used for documented features of a compiler or interpreter implementation that are not described by the language standard, as well as for the implementation of such features, and for the provision of language features (e. g. syntax highlighting) in an IDE.

C++ Modules - why were they removed from C++0x? Will they be back later on?

I just discovered this old C++0x draft about modules in C++0x. The idea was to get out of …

c++ c++11 module standards language-extension
How do I enable language extensions from within GHCi?

I'm trying to enable XRankNTypes in GHCi. How do I do this?

haskell ghci language-extension