equivariant functions

[Christopher Wright]

Andrei Alexandrescu wrote:
> Even in natural language identical words are reused for various 
> different meanings. This suggests that people would not feel comfortable 
> with a very large vocabulary. The size of vocabularies varies 
> dramatically, but if you look closer you'll see that languages with 
> large vocabularies tend to have simpler grammars, suggesting that a 
> language's overall complexity is a constant-sum game.

When you try to use principles from natural languages in a programming 
language, you might end up with Perl. For all of our sakes, be careful.

For that matter, what about adding a few synonyms to D? There's always 
== versus is for primitive value types....