On Kotlin pre-1.0 you could use any function as i...

# announcements

[gildor]

On Kotlin pre-1.0 you could use any function as infix, now you must explicitly mark it with infix
Check this post “Operators and infix functions” paragraph
https://blog.jetbrains.com/kotlin/2015/09/call-for-feedback-upcoming-changes-in-kotlin/