alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Scala example source code file (tcpoly_variance.scala)

This example Scala source code file (tcpoly_variance.scala) 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, b, b

The Scala tcpoly_variance.scala source code

class A[m[x]] {
 def str: m[Object] = sys.error("foo")
}

class B[m[x]] extends A[m] {
 override def str: m[String]  = sys.error("foo") // since x in m[x] is invariant, ! m[String] <: m[Object]
}

Other Scala examples (source code examples)

Here is a short list of links related to this Scala tcpoly_variance.scala source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.