libs/core: Add luci.util.create_dtable

diff --git a/libs/core/luasrc/util.lua b/libs/core/luasrc/util.lua
index 48b6fa063cffc625c1a00f6ff188f15aae369d79..22f295d23f4613dbd5803fa9f3a7f24cb1bad1f1 100644 (file)
--- a/libs/core/luasrc/util.lua
+++ b/libs/core/luasrc/util.lua
@@ -375,6 +375,19 @@ function clone(object, deep)
        return copy
 end
 
+
+--- Create a dynamic table which automatically creates subtables.
+-- @return     Dynamic Table
+function create_dtable()
+        return setmetatable({}, { __index =
+                function(tbl, key)
+                        return rawget(tbl, key)
+                         or rawget(rawset(tbl, key, create_dtable()), key)
+                end
+        })
+end
+
+
 -- Serialize the contents of a table value.
 function _serialize_table(t)
        local data = ""