Merge rust-bitcoin/rust-secp256k1#361: Add basic derives for Parity

1671dfc2ed Release 0.21.2 (sanket1729)
837be22e09 Basic derives for Parity (sanket1729)
7059192de9 Wildcard export from key module (sanket1729)

Pull request description:

  Sorry for getting another point release. This time I have tested against this branch for rust-bitcoin https://github.com/rust-bitcoin/rust-bitcoin/pull/755. Hopefully, this is the last release.

  Next release, we should have a Release Candidate for a couple of days before publishing a release.

ACKs for top commit:
  apoelstra:
    ACK 1671dfc2ed

Tree-SHA512: 263ad027da3da764bd76f719200382c47ba21a976caefc23ebef45d1c4be35ddfc80ce619b57326310aaab22bbf75ca7f1db80b45e95ec076584805efb791f3f

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "secp256k1"
-version = "0.21.1"
+version = "0.21.2"
 authors = [ "Dawid Ciężarkiewicz <dpc@ucore.info>",
             "Andrew Poelstra <apoelstra@wpsoftware.net>" ]
 license = "CC0-1.0"

src/key.rs

@@ -910,6 +910,7 @@ impl XOnlyPublicKey {
 }
 
 /// Opaque type used to hold the parity passed between FFI function calls.
+#[derive(Copy, Clone, PartialEq, Eq, Debug, PartialOrd, Ord, Hash)]
 pub struct Parity(i32);
 
 impl From<i32> for Parity {
@@ -924,6 +925,39 @@ impl From<Parity> for i32 {
     }
 }
 
+#[cfg(feature = "serde")]
+#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
+impl ::serde::Serialize for Parity {
+    fn serialize<S: ::serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+        s.serialize_i32(self.0)
+    }
+}
+
+#[cfg(feature = "serde")]
+#[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
+impl<'de> ::serde::Deserialize<'de> for Parity {
+    fn deserialize<D: ::serde::Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
+        struct I32Visitor;
+
+        impl<'de> ::serde::de::Visitor<'de> for I32Visitor
+        {
+            type Value = Parity;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("Expecting a 4 byte int i32")
+            }
+
+            fn visit_i32<E>(self, v: i32) -> Result<Self::Value, E>
+                where E: ::serde::de::Error
+            {
+                Ok(Parity::from(v))
+            }
+        }
+
+        d.deserialize_i32(I32Visitor)
+    }
+}
+
 impl CPtr for XOnlyPublicKey {
     type Target = ffi::XOnlyPublicKey;
     fn as_c_ptr(&self) -> *const Self::Target {

src/lib.rs

@@ -181,7 +181,7 @@ pub mod schnorr;
 #[cfg(feature = "serde")]
 mod serde_util;
 
-pub use key::{SecretKey, PublicKey, ONE_KEY, KeyPair, XOnlyPublicKey, Parity};
+pub use key::*;
 pub use context::*;
 use core::marker::PhantomData;
 use core::{mem, fmt, str};