This is a pretty sweet little tool. Rex (Regular Expression Exploration) is a tool that allows you to give it a regular expression and it returns matching strings. The example below creates10 strings that start and end with a number and have at least 2 characters:

> rex.exe "^\d.*\d$" /k:10

This is something I could use to validate/generate the Regular Expressions I have created with both UppercuT and RoundhousE.

Check out the video below:

Margus Veanes - Rex - Symbolic Regular Expression Exploration

Margus Veanes, a Researcher from the RiSE group at Microsoft Research, gives an overview of Rex, a tool that generates matching string from .NET regular expressions. Rex turns regular expres...