Update newLit set[T] to work when set is empty. (nim-lang#14662)

* Update macros.nim * Update lib/core/macros.nim Co-authored-by: Clyybber <darkmine956@gmail.com> Co-authored-by: Clyybber <darkmine956@gmail.com>
solo989 · Jun 15, 2020 · 3cbf593 · 3cbf593
1 parent 571bc01
commit 3cbf593
Showing 1 changed file with 4 additions and 0 deletions.
diff --git 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