Haskell is full of function calls, so the Haskell designers have used/invented several different ways to avoid some parenthesys in the code.
>From what I've seen if you remove some parenthesis well, in the right places, >the resulting code is less noisy, more readable, and it has less chances to >contain a bug (because syntax noise is a good place for bugs to hide). One of the ways used to remove some parenthesys is a standard syntax that's optionally usable on any dyadic function (function with two arguments): sum a b = a + b sum 1 5 == 1 `sum` 5 The `name` syntax is just a different way to call a regular function with two arguments. In Haskell there is also a way to assign an arbitrary precedence and associativity to such infix operators, but some Haskell programmers argue that too much syntax sugar gives troubles ( http://www.haskell.org/haskellwiki/Use_of_infix_operators ). In D the back tick has a different meaning, and even if in D you use a different syntax, like just a $ prefix, I don't know how much good this syntax is for D: int sum(int x, int y) { return x + y; } int s = sum(1, sum(5, sum(6, sum(10, 30)))); Equals to (associativity of $ is fixed like this): int s = 1 $sum 5 $sum 6 $sum 10 $sum 30; So I think it's not worth adding to D. Bye, bearophile
