The manifold project integrates code gen directly into the compiler. The GraphQL[1] module is amazing. The JSON[2] module for REST looks similarly impressive,

The manifold project integrates code gen directly into the compiler. The GraphQL[1] module is amazing. The JSON[2] module for REST looks similarly impressive, but I haven’t personally used it. 1. https://github.com/manifold-systems/manifold/tree/master/manifold-deps-parent/manifold-graphql https://github.com/manifold-systems/manifold/tree/master/man... 2. https://github.com/manifold-systems/manifold/tree/master/manifold-deps-parent/manifold-json https://github.com/manifold-systems/manifold/tree/master/man...