Code Generation with KAPT

Simple demonstration how to use KotlinPoet to generate code with combination of KAPT and simple yet another calculator example.

Project structure

• app - cli application module, contains hand written calculator and operation implementations.
• annotation - single annotation file module for marking classes suitable for annotation processing tool (requires to be in a separate module to avoid circular dependencies between modules).
• kapt-tool - annotation processor module, which actually generates code using KotlinPoet.

Useful links

• KotlinPoet docs
• Google AutoService library
• KotlinConf talk about Annotation Processing
• Gradle multi - project builds