flex

linux

Lexical analyzer generator. Given the specification for a lexical analyzer, generates C code implementing it.

Options (3)

-t, --stdoutboolean

Write analyzer to `stdout`

Example: flex {{[-t|--stdout]}} {{analyzer.l}}

-o, --outfileboolean

Specify the output file

Example: flex {{analyzer.l}} {{[-o|--outfile]}} {{analyzer.c}}

-B, --batchboolean

Generate a batch scanner instead of an interactive scanner

Example: flex {{[-B|--batch]}} {{analyzer.l}}

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

flex analyzer.l

Write analyzer to `stdout`

flex [-t|--stdout] analyzer.l

Specify the output file

flex analyzer.l [-o|--outfile] analyzer.c

Generate a batch scanner instead of an interactive scanner

flex [-B|--batch] analyzer.l

Compile a C file generated by Lex

cc path/to/lex.yy.c -o executable