MatchParams for auto actions

I had an idea for a new MatchParams attribute applicable for auto actions. I've looked into Catalyst::Dispatcher and unfortunately I don't see how it could be implemented - but I decided post it here anyway - maybe someone with more Catalyst knowledge will help implementing it. I think this would greatly simplify the chaining of actions. Instead of specifying three attributes (Chained, PathPart and CaptureArgs) you would need to specify just one.

Here is how it would work - using the canonical example for Catalyst::DispatchType::Chained (for the path "/wiki/FooBarPage/rev/23/view"):


sub wiki : PathPart('wiki') Chained('/') CaptureArgs(1) {
my ( $self, $c, $page_name ) = @_;
# load the page named $page_name and put the object
# into the stash
}

sub rev : PathPart('rev') Chained('wiki') CaptureArgs(1) {
my ( $self, $c, $revision_id ) = @_;
# use the page object in the stash to get at its
# revision with number $revision_id
}

sub view : PathPart Chained('rev') Args(0) {
my ( $self, $c ) = @_;
# display the revision in our stash. Another option
# would be to forward a compatible object to the action
# that displays the default wiki pages, unless we want
# a different interface here, for example restore
# functionality.
}

would become

package Wiki;

sub auto : MatchParams ( qr/\w+/ ) {
my ( $self, $c, $page_name ) = @_;
# load the page named $page_name and put the object
# into the stash
}

package Wiki::Rev;

sub auto : MatchParams ( qr/\d+/ ) {
my ( $self, $c, $revision_id ) = @_;
# use the page object in the stash to get at its
# revision with number $revision_id
}

sub view : Local {
my ( $self, $c ) = @_;
# display the revision in our stash. Another option
# would be to forward a compatible object to the action
# that displays the default wiki pages, unless we want
# a different interface here, for example restore
# functionality.
}

Does it not look simpler? Instead of a completely new language for chaining actions it uses the standard directory tree model that we are all accustomed to. And it works in the spirit of the common practice of using auto to put some prerequisites to the stash.