This is nice within a specific usecase: Being able to make files with all the pattern chunks you use repeatedly, so you can reuse them and add to them. If you c

This is nice within a specific usecase: Being able to make files with all the pattern chunks you use repeatedly, so you can reuse them and add to them. If you can't make files, it at least looks no worse than composing regexes on the command line, but it also doesn't look all that different. Edit: OK, I was wrong. It is strictly more powerful than regexes, in that it can correctly match nested pairs.