serde for BlockRng, ReseedingRng and ReadRng

Cargo.toml

@@ -20,7 +20,7 @@ include = ["src/", "LICENSE-*", "README.md", "CHANGELOG.md", "COPYRIGHT"]
 # Meta-features:
 default = ["std", "std_rng"]
 nightly = [] # enables performance optimizations requiring nightly rust
-serde1 = ["serde"]
+serde1 = ["serde", "rand_core/serde1"]
 
 # Option (enabled by default): without "std" rand uses libcore; this option
 # enables functionality expected to be available on a standard platform.

rand_core/src/block.rs

@@ -114,6 +114,12 @@ pub trait BlockRngCore {
 /// [`try_fill_bytes`]: RngCore::try_fill_bytes
 #[derive(Clone)]
 #[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
+#[cfg_attr(
+    feature = "serde1",
+    serde(
+        bound = "for<'x> R: Serialize + Deserialize<'x> + Sized, for<'x> R::Results: Serialize + Deserialize<'x>"
+    )
+)]
 pub struct BlockRng<R: BlockRngCore + ?Sized> {
     results: R::Results,
     index: usize,

src/rngs/adapter/read.rs

@@ -44,6 +44,7 @@ use rand_core::{impls, Error, RngCore};
 /// [`OsRng`]: crate::rngs::OsRng
 /// [`try_fill_bytes`]: RngCore::try_fill_bytes
 #[derive(Debug)]
+#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]
 pub struct ReadRng<R> {
     reader: R,
 }

src/rngs/adapter/reseeding.rs

@@ -14,6 +14,8 @@ use core::mem::size_of;
 
 use rand_core::block::{BlockRng, BlockRngCore};
 use rand_core::{CryptoRng, Error, RngCore, SeedableRng};
+#[cfg(feature = "serde1")]
+use serde::{Deserialize, Serialize};
 
 /// A wrapper around any PRNG that implements [`BlockRngCore`], that adds the
 /// ability to reseed it.
@@ -76,6 +78,13 @@ use rand_core::{CryptoRng, Error, RngCore, SeedableRng};
 /// [`ReseedingRng::new`]: ReseedingRng::new
 /// [`reseed()`]: ReseedingRng::reseed
 #[derive(Debug)]
+#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
+#[cfg_attr(
+    feature = "serde1",
+    serde(
+        bound = "for<'x> R: Serialize + Deserialize<'x> + Sized, for<'x> R::Results: Serialize + Deserialize<'x>, for<'x> Rsdr: Serialize + Deserialize<'x>"
+    )
+)]
 pub struct ReseedingRng<R, Rsdr>(BlockRng<ReseedingCore<R, Rsdr>>)
 where
     R: BlockRngCore + SeedableRng,
@@ -148,6 +157,7 @@ where
 }
 
 #[derive(Debug)]
+#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
 struct ReseedingCore<R, Rsdr> {
     inner: R,
     reseeder: Rsdr,