add supports for merging with `ifblock`

1 files changed, 4 insertions, 3 deletions

diff --git a/script/vm/node.lua b/script/vm/node.lua
index 2e408128..d0fd5ffb 100644
--- a/script/vm/node.lua
+++ b/script/vm/node.lua
@@ -188,9 +188,6 @@ end
 
 ---@return vm.node
 function mt:setFalsy()
-    if self.optional == false then
-        self.optional = nil
-    end
     local hasBoolean
     for index = #self, 1, -1 do
         local c = self[index]
@@ -229,6 +226,10 @@ function mt:setFalsy()
     if hasBoolean then
         self:merge(vm.declareGlobal('type', 'false'))
     end
+    if self.optional then
+        self.optional = nil
+        self:merge(vm.declareGlobal('type', 'nil'))
+    end
     return self
 end