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Fatal(3)	       Perl Programmers Reference Guide		      Fatal(3)

       Fatal - replace functions with equivalents which succeed or die

	   use Fatal qw(open close);

	   sub juggle { . . . }
	   import Fatal 'juggle';

       "Fatal" provides a way to conveniently replace functions which normally
       return a false value when they fail with equivalents which raise
       exceptions if they are not successful.  This lets you use these
       functions without having to test their return values explicitly on each
       call.  Exceptions can be caught using "eval{}".	See perlfunc and
       perlvar for details.

       The do-or-die equivalents are set up simply by calling Fatal's "import"
       routine, passing it the names of the functions to be replaced.  You may
       wrap both user-defined functions and overridable CORE operators (except
       "exec", "system" which cannot be expressed via prototypes) in this way.

       If the symbol ":void" appears in the import list, then functions named
       later in that import list raise an exception only when these are called
       in void context--that is, when their return values are ignored.	For

	       use Fatal qw/:void open close/;

	       # properly checked, so no exception raised on error
	       if(open(FH, "< /bogotic") {
		       warn "bogo file, dude: $!";

	       # not checked, so error raises an exception
	       close FH;

       You should not fatalize functions that are called in list context,
       because this module tests whether a function has failed by testing the
       boolean truth of its return value in scalar context.

       Lionel Cons (CERN).

       Prototype updates by Ilya Zakharevich <ilya@math.ohio-state.edu>.

perl v5.10.0			  2007-12-18			      Fatal(3)

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