From 3cbf59336d6b9838dbf534f8e55fdfc8e7ab6954 Mon Sep 17 00:00:00 2001
From: solo989 <solo989@yahoo.com>
Date: Mon, 15 Jun 2020 00:15:17 -0700
Subject: [PATCH] Update newLit set[T] to work when set is empty. (#14662)

* Update macros.nim

* Update lib/core/macros.nim

Co-authored-by: Clyybber <darkmine956@gmail.com>

Co-authored-by: Clyybber <darkmine956@gmail.com>
---
 lib/core/macros.nim | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/core/macros.nim b/lib/core/macros.nim
index 3590a162bf77c..27ff063a76312 100644
--- a/lib/core/macros.nim
+++ b/lib/core/macros.nim
@@ -793,6 +793,10 @@ proc newLit*[T](s: set[T]): NimNode {.compileTime.} =
   result = nnkCurly.newTree
   for x in s:
     result.add newLit(x)
+  if result.len == 0:
+    # add type cast for empty set
+    var typ = getTypeInst(typeof(s))[1]
+    result = newCall(typ,result)
 
 proc newLit*(arg: tuple): NimNode {.compileTime.} =
   result = nnkPar.newTree