Class::MakeMethods::Composite::Universal - Composite Method Tricks Class::MakeMethods::Composite::Universal->make_patch( -TargetClass => 'SomeClass::OverYonder', name => 'foo', pre_rules => [ sub { my $method = pop; warn "Arguments for foo:", @_ } ] post_rules => [ sub { warn "Result of foo:", Class::MakeMethods::Composite->CurrentResults } ] ); The Composite::Universal suclass of MakeMethods provides some generally-applicable types of methods based on Class::MakeMethods::Composite.

patch
The patch ruleset generates composites whose core behavior is based on an existing subroutine. Here's a sample usage: sub foo { my $count = shift; return 'foo' x $count; } Class::MakeMethods::Composite::Universal->make( -ForceInstall => 1, patch => { name => 'foo', pre_rules => [ sub { my $method = pop @_; if ( ! scalar @_ ) { @{ $method->{args} } = ( 2 ); } }, sub { my $method = pop @_; my $count = shift; if ( $count > 99 ) { Carp::confess "Won't foo '$count' -- that's too many!" } }, ], post_rules => [ sub { my $method = pop @_; if ( ref $method->{result} eq 'SCALAR' ) { ${ $method->{result} } =~ s/oof/oozle-f/g; } elsif ( ref $method->{result} eq 'ARRAY' ) { map { s/oof/oozle-f/g } @{ $method->{result} }; } } ], }, );

make_patch
A convenient wrapper for "make()" and the "patch" method generator. Provides the '-ForceInstall' flag, which is required to ensure that the patched subroutine replaces the original. For example, one could add logging to an existing method as follows: Class::MakeMethods::Composite::Universal->make_patch( -TargetClass => 'SomeClass::OverYonder', name => 'foo', pre_rules => [ sub { my $method = pop; warn "Arguments for foo:", @_ } ] post_rules => [ sub { warn "Result of foo:", Class::MakeMethods::Composite->CurrentResults } ] ); See Class::MakeMethods for general information about this distribution. See Class::MakeMethods::Composite for more about this family of subclasses.