NAME Devel::BeginLift - make selected sub calls evaluate at compile time SYNOPSIS use Devel::BeginLift qw(foo baz); use vars qw($i); BEGIN { $i = 0 } sub foo { "foo: $_[0]\n"; } sub bar { "bar: $_[0]\n"; } for (1 .. 3) { print foo($i++); print bar($i++); } no Devel::BeginLift; print foo($i++); outputs - foo: 0 bar: 1 foo: 0 bar: 2 foo: 0 bar: 3 foo: 4 DESCRIPTION Devel::BeginLift 'lifts' arbitrary sub calls to running at compile time - sort of a souped up version of "use constant". It does this via some slightly insane perlguts magic. import use Devel::BeginLift qw(list of subs); Calls Devel::BeginLift->setup_for(__PACKAGE__ => \@list_of_subs); unimport no Devel::BeginLift; Calls Devel::BeginLift->teardown_for(__PACKAGE__); setup_for Devel::BeginLift->setup_for($package => \@subnames); Installs begin lifting magic (unless already installed) and registers "${package}::$name" for each member of @subnames to be executed when parsed and replaced with its output rather than left for runtime. teardown_for Devel::BeginLift->teardown_for($package); Deregisters all subs currently registered for $package and uninstalls begin lifting magic is number of teardown_for calls matches number of setup_for calls. setup_for_cv $id = Devel::BeginLift->setup_for_cv(\&code); Same as "setup_for", but only registers begin lifting magic for one code reference. Returns an id to be used in "teardown_for_cv". teardown_for_cv Devel::BeginLift->teardown_for_cv($id); Deregisters begin lifting magic referred to by $id. AUTHOR Matt S Trout - Company: http://www.shadowcatsystems.co.uk/ Blog: http://chainsawblues.vox.com/ LICENSE This library is free software under the same terms as perl itself