From b1a02537b0e0bd537b53619b58afdf3f714e68c9 Mon Sep 17 00:00:00 2001
From: Eugene Kabanov <eugene.kabanov@status.im>
Date: Wed, 28 Sep 2022 09:04:08 +0300
Subject: [PATCH] Fix shallowCopy nim-devel issue. (#39)

---
 presto/btrees.nim | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/presto/btrees.nim b/presto/btrees.nim
index cc4c93e..a6d577b 100644
--- a/presto/btrees.nim
+++ b/presto/btrees.nim
@@ -77,7 +77,10 @@ proc copyHalf[Key, Val](h, result: Node[Key, Val]) =
       result.links[j] = h.links[Mhalf + j]
   else:
     for j in 0..<Mhalf:
-      shallowCopy(result.vals[j], h.vals[Mhalf + j])
+      when defined(gcArc) or defined(gcOrc):
+        result.vals[j] = move h.vals[Mhalf + j]
+      else:
+        shallowCopy(result.vals[j], h.vals[Mhalf + j])
 
 proc split[Key, Val](h: Node[Key, Val]): Node[Key, Val] =
   ## split node in half
@@ -94,7 +97,10 @@ proc insert[Key, Val](h: Node[Key, Val], key: Key, val: Val): Node[Key, Val] =
       if less(key, h.keys[j]): break
       inc j
     for i in countdown(h.entries, j+1):
-      shallowCopy(h.vals[i], h.vals[i-1])
+      when defined(gcArc) or defined(gcOrc):
+        h.vals[i] = move h.vals[i-1]
+      else:
+        shallowCopy(h.vals[i], h.vals[i-1])
     h.vals[j] = val
   else:
     var newLink: Node[Key, Val] = nil