This is a task for the Aspect module.

after
   { $_[0]->return_value( '('. $_[0]->return_value. ')' ) }
      call 'SomePackage::value';
[download]

Sure you could do this with Hook::LexWrap, in fact that is how Aspect does it. But this is easier. The main difference is that you can select entire groups of methods, using a pointcut language.

Say you wanted to parenthesize not one method, but all MyPackage methods, except the constructor:

after
   { $_[0]->return_value( '('. $_[0]->return_value. ')' ) }
      call qr/^SomePackage/ &
      !call qr/^SomePackage::new/;
[download]

Unfortunately you cannot match by attributes or inheritance yet.

And if you want to create a reusable aspect (like the Wormhole):

# creating an aspect

package Aspect::Library::Parenthesize;
use Aspect;
use base 'Aspect::Modular';

sub get_advice {
   after
      { $_[0]->return_value( '('. $_[0]->return_value. ')' ) }
         pop;
}


# using the new aspect

package main;
use Aspect;
use SomePackage;

aspect Parenthesize =>
   call 'SomePackage::value' &
   !cflow 'HatesParentheses::run' &
   cflow 'LikesParentheses::run';
[download]