Re: RFC 170 (v1) Generalize =~ to a special-purpose assignment operator

> This RFC proposes a simple use for C<=~>: as a last-argument rvalue
> duplicator. What this means is that an expression such as this:
> 
>    $value = dostuff($arg1, $arg2, $value);
> 
> Could now be rewritten as:
> 
>    $value =~ dostuff($arg1, $arg2);

David Nicol and I were brainstorming offline, and came up with a cool
extension: ~=. These new operator would do a similar thing to =~ as
described by the RFC, only LEFT padding the args:

    $stuff =~ dojunk(@args);   # $stuff = dojunk(@args, $stuff);
    $stuff ~= dojunk(@args);   # $stuff = dojunk($stuff, @args);

The position of the ~ tells you how args are filled in: if it's on the
left, then they're filled in to the left. If they're on the right, then
they're filled in to the right. Quite flexible, IMO.

-Nate