| /* |
| * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| package kotlinx.coroutines.flow.internal |
| |
| import kotlinx.coroutines.internal.* |
| import kotlin.jvm.* |
| import kotlin.native.concurrent.* |
| |
| /** |
| * This value is used a a surrogate `null` value when needed. |
| * It should never leak to the outside world. |
| * Its usage typically are paired with [Symbol.unbox] usages. |
| */ |
| @JvmField |
| @SharedImmutable |
| internal val NULL = Symbol("NULL") |
| |
| /** |
| * Symbol to indicate that the value is not yet initialized. |
| * It should never leak to the outside world. |
| */ |
| @JvmField |
| @SharedImmutable |
| internal val UNINITIALIZED = Symbol("UNINITIALIZED") |
| |
| /* |
| * Symbol used to indicate that the flow is complete. |
| * It should never leak to the outside world. |
| */ |
| @JvmField |
| @SharedImmutable |
| internal val DONE = Symbol("DONE") |