From a367d18b51d38b9cd1b1e2ca1102ed34da0bc479 Mon Sep 17 00:00:00 2001
From: Max Cahill <1bardesign@gmail.com>
Date: Tue, 19 May 2020 13:00:23 +1000
Subject: [PATCH] [added] assert:some for nil checks

---
 assert.lua | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/assert.lua b/assert.lua
index c2d06a9..10c1b03 100644
--- a/assert.lua
+++ b/assert.lua
@@ -26,6 +26,15 @@ local function _extra(msg)
 	return "(note: " .. msg .. ")"
 end
 
+--assert a value is not nil
+function assert:some(v, msg, stack_level)
+	if v == nil then
+		error(("assertion failed: value is nil %s"):format(
+			_extra(msg)
+		), 2 + (stack_level or 0))
+	end
+end
+
 --assert two values are equal
 function assert:equals(a, b, msg, stack_level)
 	if a ~= b then