The compiler interface is a binary contract between Zinc and the Scala compiler. The interface is written in Java. All details are subject to change.

About compiler bridges

An implementation of a compiler interface specific to a Scala version is called a compiler bridge. A build tool is responsible for locating a compiler bridge to use Zinc.

Relationships between the components

The following diagram outlines the relationship between the components:

Scala 2.x and Scala 3.x compilers expose tree walking interface APICallback, and Zinc registers the callbacks to gather data during compilation.