There is a related cool system: http://groups.csail.mit.edu/uid/lapis/ http://groups.csail.mit.edu/uid/lapis/ It is actually a text editor, and doesn't come up

There is a related cool system: http://groups.csail.mit.edu/uid/lapis/ http://groups.csail.mit.edu/uid/lapis/ It is actually a text editor, and doesn't come up with Regular Expressions but similar textual constraint patterns.