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This is a grammar for defining regular expressions and simplifying
them. It implements an interactive regular expression parser and
normalizer. One enters a regular expression, or a definition
associating a regular expression to an indentifier, and it is parsed
and, if syntactically correct, it is normalized and its normal form
is printed back.
[See also the grammar source files]
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Copyright © 2012 by Hassan Aït-Kaci; All Rights Reserved.