Standardizing IO Interfaces for Scala Libraries

[tpolecat]

@lihaoyi

• Most parsing libraries could accept Readable to allow streaming parsing: e.g. scala-parser-combinators, @tpolecat’s Atto, Scodec

I have standardized on fs2 for my work and it works well for me (including adaptation to Java IO when necessary). I share @adamw’s concerns about this API … also it’s not functional so it’s probably not something I would use.