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re2c is a tool for generating C-based recognizers from regular
expressions. re2c-based scanners are efficient: for programming
languages, given similar specifications, an re2c-based scanner is
typically almost twice as fast as a flex-based scanner with little or no
increase in size (possibly a decrease on cisc architectures). Indeed,
re2c-based scanners are quite competitive with hand-crafted ones.
WWW: http://re2c.sourceforge.net/
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