fixes #3357

tests/vm/tyaytypedesc.nim

@@ -0,0 +1,21 @@
+discard """
+  output: "ntWhitespace"
+"""
+
+# bug #3357
+
+type NodeType* = enum
+  ntWhitespace
+
+type TokenType* = enum
+  ttWhitespace
+
+proc enumTable*[A, B, C](a: openarray[tuple[key: A, val: B]], ret: typedesc[C]): C =
+  for item in a:
+    result[item.key] = item.val
+
+const tokenTypeToNodeType = {
+  ttWhitespace: ntWhitespace,
+}.enumTable(array[ttWhitespace..ttWhitespace, NodeType])
+
+echo tokenTypeToNodeType[ttWhitespace]