From ea4117572594d87bddc8c60763935fa92cff7e3d Mon Sep 17 00:00:00 2001
From: Vinay Sajip <vinay_sajip@yahoo.co.uk>
Date: Wed, 11 Jan 2017 07:23:16 +0000
Subject: [PATCH] Added isNil*(Value).

---
 src/private/value.nim | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/private/value.nim b/src/private/value.nim
index 7f10ee2..2f3e647 100644
--- a/src/private/value.nim
+++ b/src/private/value.nim
@@ -102,6 +102,17 @@ proc `==`*(a, b: Value): bool =
     a.kind == b.kind and a.str == b.str
 
 
+proc isNil*(v: Value): bool =
+    case v.kind
+    of vkNone:
+        result = true
+    of vkStr:
+        result = v.str_v.isNil
+    of vkList:
+        result = v.list_v.isNil
+    else:
+        result = false
+
 proc val(): Value = Value(kind: vkNone)
 proc val(v: bool): Value = Value(kind: vkBool, bool_v: v)
 proc val(v: int): Value = Value(kind: vkInt, int_v: v)