1 files changed, 71 insertions, 0 deletions
diff --git a/vendor/der/src/encode_ref.rs b/vendor/der/src/encode_ref.rs
new file mode 100644
index 0000000..8a60a93
--- /dev/null
+++ b/vendor/der/src/encode_ref.rs
@@ -0,0 +1,71 @@
+//! Wrapper object for encoding reference types.
+// TODO(tarcieri): replace with blanket impls of `Encode(Value)` for reference types?
+
+use crate::{Encode, EncodeValue, Length, Result, Tag, Tagged, ValueOrd, Writer};
+use core::cmp::Ordering;
+
+/// Reference encoder: wrapper type which impls `Encode` for any reference to a
+/// type which impls the same.
+pub struct EncodeRef<'a, T>(pub &'a T);
+
+impl<'a, T> AsRef<T> for EncodeRef<'a, T> {
+    fn as_ref(&self) -> &T {
+        self.0
+    }
+}
+
+impl<'a, T> Encode for EncodeRef<'a, T>
+where
+    T: Encode,
+{
+    fn encoded_len(&self) -> Result<Length> {
+        self.0.encoded_len()
+    }
+
+    fn encode(&self, writer: &mut impl Writer) -> Result<()> {
+        self.0.encode(writer)
+    }
+}
+
+/// Reference value encoder: wrapper type which impls `EncodeValue` and `Tagged`
+/// for any reference type which impls the same.
+///
+/// By virtue of the blanket impl, this type also impls `Encode`.
+pub struct EncodeValueRef<'a, T>(pub &'a T);
+
+impl<'a, T> AsRef<T> for EncodeValueRef<'a, T> {
+    fn as_ref(&self) -> &T {
+        self.0
+    }
+}
+
+impl<'a, T> EncodeValue for EncodeValueRef<'a, T>
+where
+    T: EncodeValue,
+{
+    fn value_len(&self) -> Result<Length> {
+        self.0.value_len()
+    }
+
+    fn encode_value(&self, writer: &mut impl Writer) -> Result<()> {
+        self.0.encode_value(writer)
+    }
+}
+
+impl<'a, T> Tagged for EncodeValueRef<'a, T>
+where
+    T: Tagged,
+{
+    fn tag(&self) -> Tag {
+        self.0.tag()
+    }
+}
+
+impl<'a, T> ValueOrd for EncodeValueRef<'a, T>
+where
+    T: ValueOrd,
+{
+    fn value_cmp(&self, other: &Self) -> Result<Ordering> {
+        self.0.value_cmp(other.0)
+    }
+}