2025-04-03 20:36:56 -06:00
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# flex
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> Lexical analyzer generator.
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> Given the specification for a lexical analyzer, generates C code implementing it.
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2026-02-18 06:55:01 -07:00
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> More information: <https://manned.org/flex>.
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2025-04-03 20:36:56 -06:00
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- Generate an analyzer from a Lex file, storing it to the file `lex.yy.c`:
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`flex {{analyzer.l}}`
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- Write analyzer to `stdout`:
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`flex {{[-t|--stdout]}} {{analyzer.l}}`
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- Specify the output file:
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`flex {{analyzer.l}} {{[-o|--outfile]}} {{analyzer.c}}`
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- Generate a batch scanner instead of an interactive scanner:
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`flex {{[-B|--batch]}} {{analyzer.l}}`
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- Compile a C file generated by Lex:
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`cc {{path/to/lex.yy.c}} -o {{executable}}`
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