From 12410f8213fd668c5caf058afe475dbd7df0b77e Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Fri, 5 Mar 2021 17:41:16 -0800
Subject: [PATCH] Update to rand 0.8 and release 0.4.0

---
 Cargo.toml   |  4 ++--
 README.md    |  4 ++--
 RELEASES.md  |  6 ++++++
 src/crand.rs | 37 +++++++++++++++++++++++++++++++++++--
 src/lib.rs   |  2 +-
 5 files changed, 46 insertions(+), 7 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 70502b4..4152e0d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ categories = ["algorithms", "data-structures", "science", "no-std"]
 license = "MIT OR Apache-2.0"
 name = "num-complex"
 repository = "https://github.com/rust-num/num-complex"
-version = "0.3.1"
+version = "0.4.0"
 readme = "README.md"
 exclude = ["/bors.toml", "/ci/*", "/.github/*"]
 edition = "2018"
@@ -30,7 +30,7 @@ default-features = false
 
 [dependencies.rand]
 optional = true
-version = "0.7"
+version = "0.8"
 default-features = false
 
 [features]
diff --git a/README.md b/README.md
index f1754b2..fdb1d38 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-num-complex = "0.3"
+num-complex = "0.4"
 ```
 
 ## Features
@@ -23,7 +23,7 @@ the default `std` feature. Use this in `Cargo.toml`:
 
 ```toml
 [dependencies.num-complex]
-version = "0.3"
+version = "0.4"
 default-features = false
 ```
 
diff --git a/RELEASES.md b/RELEASES.md
index a84ca96..f3f0e95 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,9 @@
+# Release 0.4.0 (2021-03-05)
+
+- `rand` support has been updated to 0.8, requiring Rust 1.36.
+
+**Contributors**: @cuviper
+
 # Release 0.3.1 (2020-10-29)
 
 - Clarify the license specification as "MIT OR Apache-2.0".
diff --git a/src/crand.rs b/src/crand.rs
index 6df2ff4..5edf8a7 100644
--- a/src/crand.rs
+++ b/src/crand.rs
@@ -42,8 +42,41 @@ where
 }
 
 #[cfg(test)]
-fn test_rng() -> StdRng {
-    StdRng::from_seed([42; 32])
+fn test_rng() -> impl RngCore {
+    /// Simple `Rng` for testing without additional dependencies
+    struct XorShiftStar {
+        a: u64,
+    }
+
+    impl RngCore for XorShiftStar {
+        fn next_u32(&mut self) -> u32 {
+            self.next_u64() as u32
+        }
+
+        fn next_u64(&mut self) -> u64 {
+            // https://en.wikipedia.org/wiki/Xorshift#xorshift*
+            self.a ^= self.a >> 12;
+            self.a ^= self.a << 25;
+            self.a ^= self.a >> 27;
+            self.a.wrapping_mul(0x2545_F491_4F6C_DD1D)
+        }
+
+        fn fill_bytes(&mut self, dest: &mut [u8]) {
+            for chunk in dest.chunks_mut(8) {
+                let bytes = self.next_u64().to_le_bytes();
+                let slice = &bytes[..chunk.len()];
+                chunk.copy_from_slice(slice)
+            }
+        }
+
+        fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand::Error> {
+            Ok(self.fill_bytes(dest))
+        }
+    }
+
+    XorShiftStar {
+        a: 0x0123_4567_89AB_CDEF,
+    }
 }
 
 #[test]
diff --git a/src/lib.rs b/src/lib.rs
index 4afa533..ca8ff11 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,7 +14,7 @@
 //!
 //! The `num-complex` crate is tested for rustc 1.31 and greater.
 
-#![doc(html_root_url = "https://docs.rs/num-complex/0.3")]
+#![doc(html_root_url = "https://docs.rs/num-complex/0.4")]
 #![no_std]
 
 #[cfg(any(test, feature = "std"))]