fix jobpool deps

1 files changed, 6 insertions, 1 deletions

diff --git a/xmake/core/base/hashset.lua b/xmake/core/base/hashset.lua
index a30bd69f7..6cd94ceba 100644
--- a/xmake/core/base/hashset.lua
+++ b/xmake/core/base/hashset.lua
@@ -100,7 +100,7 @@ end
 -- convert hashset to an array, nil in the set will be ignored
 function hashset_impl:to_array()
     local result = {}
-    for k,_ in pairs(self._DATA) do
+    for k, _ in pairs(self._DATA) do
         if k ~= hashset._NIL then
             table.insert(result, k)
         end
@@ -126,6 +126,11 @@ function hashset_impl:size()
     return self._SIZE
 end
 
+-- is empty?
+function hashset_impl:empty()
+    return self:size() == 0
+end
+
 -- get data of hashset
 function hashset_impl:data()
     return self._DATA