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OCAMLLEX(1)									      OCAMLLEX(1)

       ocamllex - The OCaml lexer generator

       ocamllex [ -o output-file ] [ -ml ] filename.mll

       The  ocamllex(1)  command  generates  OCaml  lexers from a set of regular expressions with
       associated semantic actions, in the style of lex(1).

       Running ocamllex(1) on the input file lexer.mll produces OCaml code for a lexical analyzer
       in file lexer.ml.

       This file defines one lexing function per entry point in the lexer definition. These func-
       tions have the same names as the entry points. Lexing functions take as argument  a  lexer
       buffer, and return the semantic attribute of the corresponding entry point.

       Lexer buffers are an abstract data type implemented in the standard library module Lexing.
       The functions  Lexing.from_channel,  Lexing.from_string	and  Lexing.from_function  create
       lexer  buffers  that  read from an input channel, a character string, or any reading func-
       tion, respectively.

       When used in conjunction with a parser generated by  ocamlyacc(1),  the	semantic  actions
       compute a value belonging to the type token defined by the generated parsing module.

       The ocamllex(1) command recognizes the following options:

       -ml    Output  code  that does not use OCaml's built-in automata interpreter. Instead, the
	      automaton is encoded by OCaml functions.	This option is mainly useful  for  debug-
	      ging ocamllex(1), using it for production lexers is not recommended.

       -o output-file
	      Specify  the  name  of the output file produced by ocamllex(1).  The default is the
	      input file name, with its extension replaced by .ml.

       -q     Quiet mode.  ocamllex(1) normally outputs informational messages to  standard  out-
	      put.  They are suppressed if option -q is used.

       -v or -version
	      Print version string and exit.

       -vnum  Print short version number and exit.

       -help or --help
	      Display a short usage summary and exit.

       The OCaml user's manual, chapter "Lexer and parser generators".

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