From 1f614982389da147876722bf66c238c82b55d1c2 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Thu, 14 Mar 2019 07:24:07 +0100
Subject: added types.isFinal helper proc

---
 compiler/types.nim | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'compiler')

diff --git a/compiler/types.nim b/compiler/types.nim
index b71888906..ddd299a86 100644
--- a/compiler/types.nim
+++ b/compiler/types.nim
@@ -339,6 +339,10 @@ proc canFormAcycleAux(marker: var IntSet, typ: PType, startId: int): bool =
   of tyProc: result = typ.callConv == ccClosure
   else: discard
 
+proc isFinal*(t: PType): bool =
+  var t = t.skipTypes(abstractInst)
+  result = t.kind != tyObject or tfFinal in t.flags
+
 proc canFormAcycle*(typ: PType): bool =
   var marker = initIntSet()
   result = canFormAcycleAux(marker, typ, typ.id)
-- 
cgit 1.4.1-2-gfad0