GitHub - manifold-systems/manifold: Manifold is a Java compiler plugin, its features include Metaprogramming, Properties, Extension Methods, Operator Overloading, Templates, a Preprocessor, and more.

Manifold extends Java at compile time through the Java compiler plugin API. It adds language features and type-safe access to external data, APIs, and DSLs directly to Java, without leaving the Java compiler and without additional build steps. Compile-time metaprogramming type-safely integrates any kind of schema, metadata, or DSL directly into Java. These include: SQL (New!) JSON & JSON Schema, Y