File: variances_pos.scala

package info (click to toggle)
scala 2.9.2%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 67,208 kB
  • sloc: java: 27,488; xml: 4,412; python: 2,297; sh: 734; makefile: 16; ansic: 6
file content (8 lines) | stat: -rw-r--r-- 171 bytes parent folder | download | duplicates (8) 
1
2
3
4
5
6
7
8
 
abstract class P[+a, +b] { // SLS, Example 4.4.2
  def fst: a;
  def snd: b
}

trait Vector[+a] { // SLS, Example 4.4.3 b)
  def append[b >: a](x: Vector[b]): Vector[b]
}