You can do that already in perl 5:

    > perl -E 'my $i = 1; say "@{[ sin $i ]}";'
    0.841470984807897

perl 6 will improve things, it has a huge feature set.

This is little different from something like:

  #!/usr/bin/env perl6
  my $number = 3;
  printf( "%s\n", $number * 4 ); # prints 12

What is your complaint?

Really? printf is cool and useful for it's own domain. But there is a reason that languages provide interpolation. And the simplest possible example above is not one of those reasons.

You imply, but fail to make any actual points or explanations.

I'm not going to bother convincing you that printf is not the highest form of string interpolation. Seems like you've got your bases covered pretty well.

I never said printf is the highest form, nor did i imply it. If you think i did imply that, and you consider it to be ridiculous, then it would behoove you to ask if i did mean to imply that or not; instead of assuming that your interpretation of my words is fact and i am being ridiculous.

I consider printf an acceptable form of string interpolation, nothing more.