The only language I've seen pipe used with comments (not line comments though) is Common Lisp: #| This is a multi-line comment #| And they can be n

The only language I've seen pipe used with comments (not line comments though) is Common Lisp: #| This is a multi-line comment #| And they can be nested because this is really just a reader macro |# |# I don't think I've ever seen a standalone | for comments, especially since it's so often used as bitwise or logical or. And here they use \ for bitwise or, and the word `or` for logical or.