File: wellkinded_wrongarity2.scala

package info (click to toggle)
scala 2.11.12-6
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 62,924 kB
  • sloc: javascript: 28,808; java: 13,415; xml: 3,135; sh: 1,620; python: 756; makefile: 38; awk: 36; ansic: 6
file content (12 lines) | stat: -rw-r--r-- 501 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
 
// test well-kindedness checks

// expecting types of kind *->*
class Monad[m[x]]
trait ms1 extends Monad[String]        // wrong
trait ms2[t] extends Monad[t]          // wrong
trait ms3[m[_], t] extends Monad[m[t]] // wrong -- added to check regression on bug

// expecting types of kind *
trait Foo[x]
trait Bar1[m[_]] extends Foo[m[Int]] // check that m[Int] is properly recognized as kind-*
trait Bar2[m[_]] extends Foo[m] // check that m is properly recognized as kind *->*, while * is expected