1 files changed, 13 insertions, 6 deletions
diff --git a/script/vm/node/union.lua b/script/vm/node/union.lua
index 928a9216..a8c917d9 100644
--- a/script/vm/node/union.lua
+++ b/script/vm/node/union.lua
@@ -5,9 +5,8 @@ local mt = {}
 mt.__index = mt
 mt.type = 'union'
 
----@param source parser.object
 ---@param node   vm.node
-function mt:merge(source, node)
+function mt:merge(node)
     if not node then
         return
     end
@@ -30,13 +29,21 @@ function mt:subscribeLiteral(source)
     end
 end
 
----@param source parser.object
+function mt:eachNode()
+    local i = 0
+    return function ()
+        i = i + 1
+        return self[i]
+    end
+end
+
+---@param me   parser.object
 ---@param node vm.node
 ---@return vm.node.union
-return function (source, node)
+return function (me, node)
     local union = setmetatable({
-        source,
+        [1] = me,
     }, mt)
-    union:merge(source, node)
+    union:merge(node)
     return union
 end