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Re2c is a tool for writing very fast and very flexible scanners. Unlike any other such tool, re2c focuses on generating high efficient code for regularexpression matching. As a result this allows a much broader range of use than any traditional lexer.
A Mac application (written in MacRuby) that will allow users to write in english a definition for a regularexpression, which will then be converted into a ruby regularexpression, which can also be used in other languages with minimal modification.
PET is a C++ library that implements generic regular path expressions. It provides a set of classes and overloaded operators that allow the programmer to define regular path expressions over user-defined data structures using solely the GCC compiler
Provides a Java programmable only text file editor. No gui is available. It supplies most of the features you expect from an editor including selections.
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RExASTor is a code generator for tree like structures. The user gives it a set of expressions that look a lot like regularexpression but for trees and the tool generates Java data-structures for the described trees.
This program allows you to specify a Deterministic Finite Automata, Nondeterministic Finite Automata, or Generalized NFA and will return a regularexpression which recognizes the same language as the FA you described.