Meta-program and/or shapeless all the things!

The talk will be in three parts.

Part 1 will be an introduction to Scala macros, using live coding to demonstrate how they work and what you can do with them. We'll look at examples of implementing both a "def macro" and a macro annotation.

In Part 2 I will introduce scala.meta, the next generation of metaprogramming in Scala. I'll demonstrate the syntactic API and "meta paradise", the shiny replacement for the current Scala macro API. With more live coding, I'll show how to re-implement the macro annotation from Part 1 using meta paradise.

Finally in Part 3 I'll talk about when you should NOT use a macro because it would replicate functionality already available in Miles Sabin's shapeless library. I'll introduce a few examples of how to use shapeless to achieve the same result as writing a macro, but with less effort.

YOU MAY ALSO LIKE:

• Writing an SBT Plugin (SkillsCast recorded in February 2019)