alex - the lexical analyser generator for Haskell
alex [OPTION]... file [OPTION]...
This manual page documents briefly the alex command.
This manual page was written for the Debian GNU/Linux distribution
because the original program does not have a manual page. Instead, it
has documentation in various other formats, including DVI, Info and
HTML; see below.
Alex is a lexical analyser generator system for Haskell. It is similar
to the tool lex or flex for C/C++.
Input files are expected to be of the form file.x and alex will produce
output in file.y
Caveat: When using hbc (Chalmers Haskell) the command argument
structure is slightly different. This is because the hbc run time
system takes some flags as its own (for setting things like the heap
size, etc). This problem can be circumvented by adding a single dash
(‘-’) to your command line. So when using a hbc generated version of
Alex, the argument structure is:
alex - [OPTION]... file [OPTION]...
The programs follow the usual GNU command line syntax, with long
options starting with two dashes (‘--’). A summary of options is
included below. For a complete description, see the other
Instructs Alex to generate a lexer which will output debugging
messsages as it runs.
Instructs Alex to generate a lexer which is optimised for
compiling with GHC. The lexer will be significantly more
efficient, both in terms of the size of the compiled lexer and
-o FILE, --outfile=FILE
Specifies the filename in which the output is to be placed. By
default, this is the name of the input file with the .x suffix
replaced by .hs
-i [FILE], --info[=FILE]
Produces a human-readable rendition of the state machine (DFA)
that Alex derives from the lexer, in FILE (default: file.info
where the input file is file.x ).
The format of the info file is currently a bit basic, and not
Print version information on standard output then exit
/usr/share/doc/alex, the Alex homepage (http://haskell.org/alex/)
Alex Version 2.3.3
Copyright (c) 1995-2003, Chris Dornan and Simon Marlow
This manual page was written by Ian Lynagh <email@example.com>, based on
the happy manpage, for the Debian GNU/Linux system (but may be used by