fp1/week2/mart/VectorOverloading.icl

   1 implementation module VectorOverloading
   2
   3 import StdEnv
   4
   5 :: Vector2 a = {x0 :: a, x1 :: a}
   6
   7 instance ==   (Vector2 a) | == a   where
   8         == a b = a.x0 == b.x0 && a.x1 == b.x1
   9 instance zero (Vector2 a) | zero a where
  10         zero = {x0=zero, x1=zero}
  11 instance one  (Vector2 a) | one a  where
  12         one = {x0=one, x1=one}
  13 instance ~    (Vector2 a) | ~ a    where
  14         ~ a = {x0= ~a.x0, x1= ~a.x1}
  15 instance +    (Vector2 a) | + a    where
  16         + a b = {x0=a.x0+b.x0, x1=a.x1+b.x1}
  17 instance -    (Vector2 a) | - a    where
  18         - a b = {x0=a.x0-b.x0, x1=a.x1-b.x1}
  19 instance *    (Vector2 a) | * a    where
  20         * a b = {x0=a.x0*b.x0, x1=a.x1*b.x1}
  21 instance /    (Vector2 a) | / a    where
  22         / a b = {x0=a.x0/b.x0, x1=a.x1/b.x1}