some useful functions

include/pit/functions.h

@@ -0,0 +1,13 @@
+#include <cstddef>
+#include <functional>
+
+namespace pit{
+    template<typename T>
+    std::function<T()> generate(T val){
+        return [val](){return val;};
+    }
+    template<typename T, typename... Args>
+    std::function<T(Args...)> accept_args(std::function<T()> f){
+        return [f](Args...){return f();};
+    }
+}