Scala example source code file (tcpoly_typealias.check)

This example Scala source code file (tcpoly_typealias.check) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

a, a, any, bbound, bcon, binv, foobound, foocon, nothing, nothing, string, string, the, the

The Scala tcpoly_typealias.check source code

tcpoly_typealias.scala:37: error: The kind of type m does not conform to the expected kind of type m[+x] in trait A.
BInv.this.m's type parameters do not match type m's expected parameters: type x (in trait BInv) is invariant, but type x (in trait A) is declared covariant
  type m[x] = FooCov[x] // error: invariant x in alias def
       ^
tcpoly_typealias.scala:41: error: The kind of type m does not conform to the expected kind of type m[+x] in trait A.
BCon.this.m's type parameters do not match type m's expected parameters: type x (in trait BCon) is contravariant, but type x (in trait A) is declared covariant
  type m[-x] = FooCon[x] // error: contravariant x
       ^
tcpoly_typealias.scala:45: error: The kind of type m does not conform to the expected kind of type m[+x] in trait A.
BBound.this.m's type parameters do not match type m's expected parameters: type x (in trait BBound)'s bounds >: Nothing <: String are stricter than type x (in trait A)'s declared bounds >: Nothing <: Any
  type m[+x <: String] = FooBound[x] // error: x with stricter bound
       ^
three errors found