Vendor dependencies for 0.3.0 release

vendor/rustix-0.38.44/src/static_assertions.rs

@@ -0,0 +1,36 @@
+//! Workarounds for Rust 1.63 where some things in the `static_assertions`
+//! crate do things that don't work in const contexts. We want to call them in
+//! const contexts in Rust versions where that's supported so that problems are
+//! caught at compile time, and fall back to dynamic asserts in Rust 1.63.
+
+#![allow(unused_macros)]
+
+macro_rules! assert_eq_size {
+    ($x:ty, $y:ty) => {
+        assert_eq!(core::mem::size_of::<$x>(), core::mem::size_of::<$y>());
+    };
+}
+
+macro_rules! assert_eq_align {
+    ($x:ty, $y:ty) => {
+        assert_eq!(core::mem::align_of::<$x>(), core::mem::align_of::<$y>());
+    };
+}
+
+macro_rules! const_assert_eq {
+    ($x:expr, $y:expr) => {
+        assert_eq!($x, $y);
+    };
+}
+
+macro_rules! const_assert_ne {
+    ($x:expr, $y:expr) => {
+        assert_ne!($x, $y);
+    };
+}
+
+macro_rules! const_assert {
+    ($x:expr) => {
+        assert!($x);
+    };
+}