From 8d1afaa9e4ce3bb4199fd232d3fab2bbf344e743 Mon Sep 17 00:00:00 2001
From: kiritow <1362050620@qq.com>
Date: Mon, 23 Oct 2017 15:09:02 +0800
Subject: [PATCH] Add argument check library

---
 checkarg.lua | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 checkarg.lua

diff --git a/checkarg.lua b/checkarg.lua
new file mode 100644
index 0000000..1c57c98
--- /dev/null
+++ b/checkarg.lua
@@ -0,0 +1,33 @@
+local function do_check(x, expected_type)
+    if (type(x) ~= expected_type) then
+        error(expected_type .. " expected, got " .. type(x))
+    end
+end
+
+function checknumber(n)
+    do_check(n, "number")
+end
+
+function checkstring(n)
+    do_check(n, "string")
+end
+
+function checknil(n)
+    do_check(n, "nil")
+end
+
+function checkbool(n)
+    do_check(n, "boolean")
+end
+
+function checkuserdata(n)
+    do_check(n, "userdata")
+end
+
+function checkfunc(n)
+    do_check(n, "function")
+end
+
+function checktable(n)
+    do_check(n, "table")
+end