Improve documentation on docs.rs (#17)

Cargo.toml

@@ -55,3 +55,8 @@ proptest = "1"
 regex = "1"
 rustyline = "8"
 voprf = { path = "", default-features = false, features = ["std"] }
+
+[package.metadata.docs.rs]
+features = ["p256", "std"]
+targets = []
+rustdoc-args = ["--cfg", "docsrs"]

src/errors.rs

@@ -57,4 +57,5 @@ impl Debug for InternalError {
 }
 
 #[cfg(feature = "std")]
+#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
 impl Error for InternalError {}

src/group/mod.rs

@@ -9,6 +9,7 @@
 
 mod expand;
 #[cfg(feature = "p256")]
+#[cfg_attr(docsrs, doc(cfg(feature = "p256")))]
 pub(crate) mod p256;
 mod ristretto;
 

src/impls.rs

@@ -129,6 +129,7 @@ macro_rules! impl_zeroize_on_drop_for {
 macro_rules! impl_serialize_and_deserialize_for {
     ($t:ident) => {
         #[cfg(feature = "serialize")]
+        #[cfg_attr(docsrs, doc(cfg(feature = "serialize")))]
         impl<CS: CipherSuite> serde::Serialize for $t<CS> {
             fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
             where
@@ -143,6 +144,7 @@ macro_rules! impl_serialize_and_deserialize_for {
         }
 
         #[cfg(feature = "serialize")]
+        #[cfg_attr(docsrs, doc(cfg(feature = "serialize")))]
         impl<'de, CS: CipherSuite> serde::Deserialize<'de> for $t<CS> {
             fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
             where

src/lib.rs

@@ -476,6 +476,7 @@
 #![cfg_attr(not(feature = "bench"), deny(missing_docs))]
 #![deny(unsafe_code)]
 #![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 extern crate alloc;