Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/third_party/rust/opaque-debug/src/lib.rs b/third_party/rust/opaque-debug/src/lib.rs
new file mode 100644
index 0000000000..c3648c35f4
--- /dev/null
+++ b/third_party/rust/opaque-debug/src/lib.rs
@@ -0,0 +1,31 @@
+//! Macro for opaque `Debug` trait implementation.
+#![no_std]
+
+/// Macro for defining opaque `Debug` implementation.
+///
+/// It will use the following format: "StructName { ... }". While it's
+/// convinient to have it (e.g. for including into other structs), it could be
+/// undesirable to leak internall state, which can happen for example through
+/// uncareful logging.
+#[macro_export]
+macro_rules! impl_opaque_debug {
+    ($struct:ty) => {
+        #[cfg(feature = "std")]
+        impl ::std::fmt::Debug for $struct {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter)
+                -> Result<(), ::std::fmt::Error>
+            {
+                write!(f, concat!(stringify!($struct), " {{ ... }}"))
+            }
+        }
+
+        #[cfg(not(feature = "std"))]
+        impl ::core::fmt::Debug for $struct {
+            fn fmt(&self, f: &mut ::core::fmt::Formatter)
+                -> Result<(), ::core::fmt::Error>
+            {
+                write!(f, concat!(stringify!($struct), " {{ ... }}"))
+            }
+        }
+    }
+}