diff --git a/src/tools/tools.hpp b/src/tools/tools.hpp
index 8d24dc6..b2d88ec 100644
--- a/src/tools/tools.hpp
+++ b/src/tools/tools.hpp
@@ -56,10 +56,17 @@ namespace zt {
         raw_print(std::cout,args...);
         return;
     }
+    inline void print(){
+        return;
+    }
 
     template<typename ...Args>
     inline void eprint(const Args&...args){
         raw_print(std::cerr,args...);
         return;
     }
+
+    inline void eprint(){
+        return;
+    }
 }
\ No newline at end of file