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lex

Lexical analyzer generator. Given the specification for a lexical analyzer, generates C code implementing it. NOTE: on most major OSes, this command is an alias for flex. More information: https://manned.org/lex.1.

Generate an analyzer from a Lex file, storing it to the file lex.yy.c:

lex {{analyzer.l}}

Specify the output file:

lex -t {{analyzer.l}} > {{analyzer.c}}

Compile a C file generated by Lex:

c99 {{path/to/lex.yy.c}} -o {{executable}}