diff --git a/lphobos/std/traits.d b/lphobos/std/traits.d
new file mode 100644
index 00000000..a5100862
--- /dev/null
+++ b/lphobos/std/traits.d
@@ -0,0 +1,15 @@
+module std.traits;
+struct TypeHolder(S, T...) {
+  S _ReturnType;
+  T _ParameterTypeTuple;
+}
+TypeHolder!(S, T) *IFTI_gen(S, T...)(S delegate(T) dg) { return null; }
+TypeHolder!(S, T) *IFTI_gen(S, T...)(S function(T) dg) { return null; }
+template ParameterTypeTuple(T) {
+  alias typeof(IFTI_gen(T.init)._ParameterTypeTuple) ParameterTypeTuple;
+}
+template ReturnType(T) {
+  alias typeof(IFTI_gen(T.init)._ReturnType) ReturnType;
+}
+template isArray(T) { const bool isArray=false; }
+template isArray(T: T[]) { const bool isArray=true; }