Vendor dependencies for 0.3.0 release

vendor/derive_more/tests/constructor.rs

@@ -0,0 +1,32 @@
+#![cfg_attr(not(feature = "std"), no_std)]
+#![allow(dead_code)] // some code is tested for type checking only
+
+use derive_more::Constructor;
+
+#[derive(Constructor)]
+struct EmptyTuple();
+
+const EMPTY_TUPLE: EmptyTuple = EmptyTuple::new();
+
+#[derive(Constructor)]
+struct EmptyStruct {}
+
+const EMPTY_STRUCT: EmptyStruct = EmptyStruct::new();
+
+#[derive(Constructor)]
+struct EmptyUnit;
+
+const EMPTY_UNIT: EmptyUnit = EmptyUnit::new();
+
+#[derive(Constructor)]
+struct MyInts(i32, i32);
+
+const MY_INTS: MyInts = MyInts::new(1, 2);
+
+#[derive(Constructor)]
+struct Point2D {
+    x: i32,
+    y: i32,
+}
+
+const POINT_2D: Point2D = Point2D::new(-4, 7);