From 6b004630746b8cd0905f5b40191147ecc7bf082c Mon Sep 17 00:00:00 2001
From: flywind <xzsflywind@gmail.com>
Date: Fri, 5 Mar 2021 23:21:33 +0800
Subject: [PATCH] Add unsafeIsolate and extract to std/isolation [backport:1.4]
 (#17263)

(cherry picked from commit 19be5eb1ebfc92c66ebf39c81c46209df734e89f)
---
 changelog.md          | 2 ++
 lib/std/isolation.nim | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/changelog.md b/changelog.md
index 4edb3474221e1..bf2fe163202ef 100644
--- a/changelog.md
+++ b/changelog.md
@@ -44,5 +44,7 @@
 
 
 
+- Added `unsafeIsolate` and `extract` to `std/isolation`.
+
 ## Tool changes
 
diff --git a/lib/std/isolation.nim b/lib/std/isolation.nim
index 7c44f47fb6e33..70395d6d496be 100644
--- a/lib/std/isolation.nim
+++ b/lib/std/isolation.nim
@@ -30,3 +30,11 @@ func isolate*[T](value: sink T): Isolated[T] {.magic: "Isolate".} =
   ## Please read https://github.com/nim-lang/RFCs/issues/244
   ## for more details.
   Isolated[T](value: value)
+
+func unsafeIsolate*[T](value: sink T): Isolated[T] =
+  ## Creates an isolated subgraph from the expression `value`.
+  Isolated[T](value: value)
+
+func extract*[T](src: var Isolated[T]): T =
+  ## Returns the internal value of `src`.
+  result = move(src.value)