Adding default package imports

Question

In Java, Scala, or generally any JVM language, there is a set of packages that is imported by default. Java, for instance, automatically imports java.lang, you don\

Answer 1

Scala, as of 2.8, has package objects, the contents of which are automatically imported into every file of the package. Create a file called package.scala in the top level directory of your package (e.g., x/y/z/mypackage), and put into it

package x.y.z

package object mypackage {
  ...
}

Then any definition within the package object is automatically imported (i.e., no import statement is needed) into any file in package x.y.z.mypackage

You can take a look at the Scala sources -- do a find dir -name package.scala -- there are a bunch of them, the topmost defining the implicit imports for the scala package itself, which are automatically imported into every scala source file.