Is it possible to redefine string interpolation? Here's the context..

Let's say there is a class called 'SF' which is conceptually just a string plus a list of values. Concatenation on two SF objects works by concatenating the strings and concatenating the lists. For example: 

$x = new SF("?", ["foo"]);
$y = new SF(",?", ["bar"]);
$x . $y is an SF object with string "?,?" and list ["foo", "bar"]
Ordinary strings have an obvious representation as SF objects by setting the list to the empty list, e.g. 
  "blather" <-> new SF("blather", []);
Suppose that we have an SF-object $name. What I would like to happen is when perl encountered an interpolated string like: 
  "Hello, $name"
that somehow the following transformations would occur: 
  "Hello, $name" -> "Hello, " . $name
                 -> new SF("Hello", []) . $name
                 -> concatenation of two SF objects
In a sense, instead of stringifing $name, the other string would get SF-ified.

Any ideas of if this can be done in either perl5 or perl6?

In reply to redefining string interpolation by perl5ever

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