The problem of union types for type systems
KotlinConf 2024 shocked me with a new announcement. Union types are coming to Kotlin! However, in a limited form. At first, I couldn't understand why, but after some talks and discussions, I realized that it is a very smart move. Now let me show you the big picture. One feature I have always admired in other programming languages is union types, such as Int | String. I haven’t had any specific pla
