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This is basically the same concept as lex, except this time it doesn't turn your code inside out, and it generates actual C code to parse the expressions (not tables), and the resulting code is usually about 2 times faster than flex.
7 lines
405 B
Plaintext
7 lines
405 B
Plaintext
re2c is a tool for generating C-based recognizers from regular
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expressions. re2c-based scanners are efficient: for programming
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languages, given similar specifications, an re2c-based scanner is
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typically almost twice as fast as a flex-based scanner with little or no
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increase in size (possibly a decrease on cisc architectures). Indeed,
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re2c-based scanners are quite competitive with hand-crafted ones.
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