Most regex engines (including that in emacs) support multi-line expressions, so that part is covered. A loong time ago I found a package on Usenet that emulate

Most regex engines (including that in emacs) support multi-line expressions, so that part is covered. A loong time ago I found a package on Usenet that emulated sam's command language. I found something on github[1] that seems to be a recent modification of that, but I haven't tested it myself (last time I loaded sam.el was in Emacs 19.34, back when I was actually using sam to do C programming). [1]: https://github.com/realwhz/sam.el https://github.com/realwhz/sam.el