Vendor dependencies for 0.3.0 release

vendor/zerocopy/tests/ui-stable/transmute-ptr-to-usize.rs

@@ -0,0 +1,20 @@
+// Copyright 2022 The Fuchsia Authors
+//
+// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
+// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
+// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
+// This file may not be copied, modified, or distributed except according to
+// those terms.
+
+extern crate zerocopy;
+
+use zerocopy::transmute;
+
+fn main() {}
+
+// It is unclear whether we can or should support this transmutation, especially
+// in a const context. This test ensures that even if such a transmutation
+// becomes valid due to the requisite implementations of `FromBytes` being
+// added, that we re-examine whether it should specifically be valid in a const
+// context.
+const POINTER_VALUE: usize = transmute!(&0usize as *const usize);