Y'know - after thinking about it a little, I'd argue that this is a question that could serve a second purpose. The obvious out-of-the box implementations of t

Y'know - after thinking about it a little, I'd argue that this is a question that could serve a second purpose. The obvious out-of-the box implementations of this in sed/perl/etc. would all fail to properly handle open and close parens in strings and comments. Particularly multi-line comments and strings with escaped quotation marks inside of them. I like sed. I like perl one-liners. I would consider it a mistake to try to do this on a real codebase in a batch manner with just a regexp. You'd be far better off googling to find a source code formatter that includes a real parser, like clang-format.