flex
Lexical analyzer generator. A rewrite of
lex
with extensions to the POSIX specification. Given the specification for a lexical analyzer, generates C code implementing it. Note: long options don't work on OpenBSD. More information: https://manned.org/flex.
- Generate an analyzer from a flex file, storing it to the file
lex.yy.c
:
lex {{analyzer.l}}
- Write analyzer to
stdout
:
lex -{{-stdout|t}} {{analyzer.l}}
- Specify the output file:
lex {{analyzer.l}} -o {{analyzer.c}}
- Generate a [B]atch scanner instead of an interactive scanner:
lex -B {{analyzer.l}}
- Compile a C file generated by Lex:
cc {{path/to/lex.yy.c}} --output {{executable}}