If I'm writing C, it's usually a small module or algorithm that I link into another language. Since D is supposed to be in gcc now, I wonder if it's reasonable

If I'm writing C, it's usually a small module or algorithm that I link into another language. Since D is supposed to be in gcc now, I wonder if it's reasonable to start including D code in e.g. Perl or Ruby or Haskell libraries. The great thing about C is once you write it, you never really have to worry about the language changing 15 years down-the-line and breaking your code. The GNU version might have a similar property, since GNU tools stay around for a long time.