Here's a good guide to which ones are benign / dangerous and what they are for: http://dev.stephendiehl.com/hask/#language-extensions http://dev.stephendiehl.co

Here's a good guide to which ones are benign / dangerous and what they are for: http://dev.stephendiehl.com/hask/#language-extensions http://dev.stephendiehl.com/hask/#language-extensions