Introduce SharedFlow · Issue #2034 · Kotlin/kotlinx.coroutines

Introduction There is a need to have a Flow implementation that is hot (always active independently of collectors) and shares emitted values among all collectors that subscribe to it. Its design generalizes StateFlow beyond the narrow set of use-case it supports (see #1973). Previously it was discussed in various issues under the tentative name of EventFlow, but having analyzed use-cases and worke