Swift uses annotations (reflection) and generates bytecode on the fly. This fits much better with modern Java development practices and tooling than source code

Swift uses annotations (reflection) and generates bytecode on the fly. This fits much better with modern Java development practices and tooling than source code generation. Is such a thing feasible C++, especially in an idiomatic way? Or perhaps I am misunderstanding your question. To my knowledge, our C++ Thrift code is here: https://github.com/facebook/fbthrift https://github.com/facebook/fbthrift (I work on Presto and occasionally Swift at Facebook, but am not at all familiar with modern C++)