[ulrikrasmussen]

I like how code generation is typically done in Kotlin using KSP. Here you write your code generator as a plugin to the compiler, so you have the full expressivity of any JVM language you like. It also operates on the parsed and resolved AST, so you can analyze even derived types. It also allows code generators to run on code which has type errors or even fails to resolve some symbols which is very useful when you generate code from class annotations and then proceed to use the generated code later in the same file.

Another advantage of using KSP is that it also handles caching for you and will avoid running code generators again if the output already exists.