Getopt::Mixed(3)					User Contributed Perl Documentation					  Getopt::Mixed(3)

NAME

       Getopt::Mixed - getopt processing with both long and short options

SYNOPSIS

	   use Getopt::Mixed;
	   Getopt::Mixed::getOptions(...option-descriptions...);
	   ...examine $opt_* variables...

       or

	   use Getopt::Mixed "nextOption";
	   Getopt::Mixed::init(...option-descriptions...);
	   while (($option, $value) = nextOption()) {
	       ...process option...
	   }
	   Getopt::Mixed::cleanup();

DESCRIPTION

       This module is obsolete.

       This package was my response to the standard modules Getopt::Std and Getopt::Long.  "Std" doesn't support long options, and "Long" didn't
       support short options.  I wanted both, since long options are easier to remember and short options are faster to type.

       However, some time ago Getopt::Long was changed to support short options as well, and it has the huge advantage of being part of the
       standard Perl distribution.  So, Getopt::Mixed is now effectively obsolete.  I don't intend to make any more changes, but I'm leaving it
       available for people who have code that already uses it.  For new modules, I recommend using Getopt::Long like this:

	   use Getopt::Long;
	   Getopt::Long::Configure(qw(bundling no_getopt_compat));
	   GetOptions(...option-descriptions...);

       This package was intended to be the "Getopt-to-end-all-Getop's".  It combines (I hope) flexibility and simplicity.  It supports both short
       options (introduced by "-") and long options (introduced by "--").  Short options which do not take an argument can be grouped together.
       Short options which do take an argument must be the last option in their group, because everything following the option will be considered
       to be its argument.

       There are two methods for using Getopt::Mixed:  the simple method and the flexible method.  Both methods use the same format for option
       descriptions.

   Option Descriptions
       The option-description arguments required by "init" and "getOptions" are strings composed of individual option descriptions.  Several
       option descriptions can appear in the same string if they are separated by whitespace.

       Each description consists of the option name and an optional trailing argument specifier.  Option names may consist of any characters but
       whitespace, "=", ":", and ">".

       Values for argument specifiers are:

	 <none>   option does not take an argument
	 =s :s	  option takes a mandatory (=) or optional (:) string argument
	 =i :i	  option takes a mandatory (=) or optional (:) integer argument
	 =f :f	  option takes a mandatory (=) or optional (:) real number argument
	 >new	  option is a synonym for option `new'

       The ">" specifier is not really an argument specifier.  It defines an option as being a synonym for another option.  For example, "a=i
       apples>a" would define -a as an option that requires an integer argument and --apples as a synonym for -a.  Only one level of synonyms is
       supported, and the root option must be listed first.  For example, "apples>a a=i" and "a=i apples>a oranges>apples" are illegal; use "a=i
       apples>a oranges>a" if that's what you want.

       For example, in the option description:
	    "a b=i c:s apple baker>b charlie:s"
		-a and --apple do not take arguments
		-b takes a mandatory integer argument
		--baker is a synonym for -b
		-c and --charlie take an optional string argument

       If the first argument to "init" or "getOptions" is entirely non-alphanumeric characters with no whitespace, it represents the characters
       which can begin options.

   User Interface
       From the user's perspective, short options are introduced by a dash ("-") and long options are introduced by a double dash ("--").  Short
       options may be combined ("-a -b" can be written "-ab"), but an option that takes an argument must be the last one in its group, because
       anything following it is considered part of the argument.  A double dash by itself marks the end of the options; all arguments following it
       are treated as normal arguments, not options.  A single dash by itself is treated as a normal argument, not an option.

       Long options may be abbreviated.  An option --all-the-time could be abbreviated --all, --a--tim, or even --a.  Note that --time would not
       work; the abbreviation must start at the beginning of the option name.  If an abbreviation is ambiguous, an error message will be printed.

       In the following examples, -i and --int take integer arguments, -f and --float take floating point arguments, and -s and --string take
       string arguments.  All other options do not take an argument.

	 -i24		 -f24.5 	      -sHello
	 -i=24 --int=-27 -f=24.5 --float=0.27 -s=Hello --string=Hello

       If the argument is required, it can also be separated by whitespace:

	 -i 24 --int -27 -f 24.5 --float 0.27 -s Hello --string Hello

       Note that if the option is followed by "=", whatever follows the "=" is the argument, even if it's the null string.  In the example

	 -i= 24 -f= 24.5 -s= Hello

       -i and -f will cause an error, because the null string is not a number, but -s is perfectly legal; its argument is the null string, not
       "Hello".

       Remember that optional arguments cannot be separated from the option by whitespace.

   The Simple Method
       The simple method is

	   use Getopt::Mixed;
	   Getopt::Mixed::getOptions(...option-descriptions...);

       You then examine the "$opt_*" variables to find out what options were specified and the @ARGV array to see what arguments are left.

       If -a is an option that doesn't take an argument, then $opt_a will be set to 1 if the option is present, or left undefined if the option is
       not present.

       If -b is an option that takes an argument, then $opt_b will be set to the value of the argument if the option is present, or left undefined
       if the option is not present.  If the argument is optional but not supplied, $opt_b will be set to the null string.

       Note that even if you specify that an option requires a string argument, you can still get the null string (if the user specifically enters
       it).  If the option requires a numeric argument, you will never get the null string (because it isn't a number).

       When converting the option name to a Perl identifier, any non-word characters in the name will be converted to underscores ("_").

       If the same option occurs more than once, only the last occurrence will be recorded.  If that's not acceptable, you'll have to use the
       flexible method instead.

   The Flexible Method
       The flexible method is

	   use Getopt::Mixed "nextOption";
	   Getopt::Mixed::init(...option-descriptions...);
	   while (($option, $value, $pretty) = nextOption()) {
	       ...process option...
	   }
	   Getopt::Mixed::cleanup();

       This lets you process arguments one at a time.  You can then handle repeated options any way you want to.  It also lets you see option
       names with non-alphanumeric characters without any translation.	This is also the only method that lets you find out what order the options
       and other arguments were in.

       First, you call Getopt::Mixed::init with the option descriptions.  Then, you keep calling nextOption until it returns an empty list.
       Finally, you call Getopt::Mixed::cleanup when you're done.  The remaining (non-option) arguments will be found in @ARGV.

       Each call to nextOption returns a list of the next option, its value, and the option as the user typed it.  The value will be undefined if
       the option does not take an argument.  The option is stripped of its starter (e.g., you get "a" and "foo", not "-a" or "--foo").  If you
       want to print an error message, use the third element, which does include the option starter.

OTHER FUNCTIONS

       Getopt::Mixed provides one other function you can use.  "abortMsg" prints its arguments on STDERR, plus your program's name and a newline.
       It then exits with status 1.  For example, if foo.pl calls "abortMsg" like this:

	 Getopt::Mixed::abortMsg("Error");

       The output will be:

	 foo.pl: Error

CUSTOMIZATION

       There are several customization variables you can set.  All of these variables should be set after calling Getopt::Mixed::init and before
       calling nextOption.

       If you set any of these variables, you must check the version number first.  The easiest way to do this is like this:

	   use Getopt::Mixed 1.006;

       If you are using the simple method, and you want to set these variables, you'll need to call init before calling getOptions, like this:

	   use Getopt::Mixed 1.006;
	   Getopt::Mixed::init(...option-descriptions...);
	   ...set configuration variables...
	   Getopt::Mixed::getOptions();      # IMPORTANT: no parameters

       $order
	   $order can be set to $REQUIRE_ORDER, $PERMUTE, or $RETURN_IN_ORDER.	The default is $REQUIRE_ORDER if the environment variable
	   POSIXLY_CORRECT has been set, $PERMUTE otherwise.

	   $REQUIRE_ORDER means that no options can follow the first argument which isn't an option.

	   $PERMUTE means that all options are treated as if they preceded all other arguments.

	   $RETURN_IN_ORDER means that all arguments maintain their ordering.  When nextOption is called, and the next argument is not an option,
	   it returns the null string as the option and the argument as the value.  nextOption never returns the null list until all the arguments
	   have been processed.

       $ignoreCase
	   Ignore case when matching options.  Default is 1 unless the option descriptions contain an upper-case letter.

       $optionStart
	   A string of characters that can start options.  Default is "-".

       $badOption
	   A reference to a function that is called when an unrecognized option is encountered.  The function receives three arguments.  $_[0] is
	   the position in @ARGV where the option came from.  $_[1] is the option as the user typed it (including the option start character).
	   $_[2] is either undef or a string describing the reason the option was not recognized (Currently, the only possible value is
	   'ambiguous', for a long option with several possible matches).  The option has already been removed from @ARGV.  To put it back, you
	   can say:

	       splice(@ARGV,$_[0],0,$_[1]);

	   The function can do anything you want to @ARGV.  It should return whatever you want nextOption to return.

	   The default is a function that prints an error message and exits the program.

       $checkArg
	   A reference to a function that is called to make sure the argument type is correct.	The function receives four arguments.  $_[0] is
	   the position in @ARGV where the option came from.  $_[1] is the text following the option, or undefined if there was no text following
	   the option.	$_[2] is the name of the option as the user typed it (including the option start character), suitable for error messages.
	   $_[3] is the argument type specifier.

	   The function can do anything you want to @ARGV.  It should return the value for this option.

	   The default is a function that prints an error message and exits the program if the argument is not the right type for the option.  You
	   can also adjust the behavior of the default function by changing $intRegexp or $floatRegexp.

       $intRegexp
	   A regular expression that matches an integer.  Default is '^[-+]?d+$', which matches a string of digits preceded by an optional sign.
	   Unlike the other configuration variables, this cannot be changed after nextOption is called, because the pattern is compiled only once.

       $floatRegexp
	   A regular expression that matches a floating point number.  Default is '^[-+]?(d*.?d+|d+.)$', which matches the following formats:
	   "123", "123.", "123.45", and ".123" (plus an optional sign).  It does not match exponential notation.  Unlike the other configuration
	   variables, this cannot be changed after nextOption is called, because the pattern is compiled only once.

       $typeChars
	   A string of the characters which are legal argument types.  The default is 'sif', for String, Integer, and Floating point arguments.
	   The string should consist only of letters.  Upper case letters are discouraged, since this will hamper the case-folding of options.	If
	   you change this, you should set $checkType to a function that will check arguments of your new type.  Unlike the other configuration
	   variables, this must be set before calling init(), and cannot be changed afterwards.

       $checkType
	   If you add new types to $typeChars, you should set this to a function which will check arguments of the new types.

BUGS

       o   This document should be expanded.

       o   A long option must be at least two characters long.	Sorry.

       o   The "!" argument specifier of Getopt::Long is not supported, but you could have options --foo and --nofoo and then do something like:

	       $opt_foo = 0 if $opt_nofoo;

       o   The "@" argument specifier of Getopt::Long is not supported.  If you want your values pushed into an array, you'll have to use
	   nextOption and do it yourself.

LICENSE

       Getopt::Mixed is distributed under the same terms as Perl itself.

       This means it is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of
       merchantability or fitness for a particular purpose.  See the GNU General Public License or the Artistic License for more details.

AUTHOR

       Christopher J. Madsen <perl AT cjmweb.net>

       Please send bug reports to bug-Getopt-Mixed AT rt.cpan.org, or use the web interface at
       http://rt.cpan.org/Public/Bug/Report.html?Queue=Getopt-Mixed <http://rt.cpan.org/Public/Bug/Report.html?Queue=Getopt-Mixed>

       Thanks are also due to Andreas Koenig for helping Getopt::Mixed conform to the standards for Perl modules and for answering a bunch of
       questions.  Any remaining deficiencies are my fault.

perl v5.12.1							    2007-03-22							  Getopt::Mixed(3)