Remove features "nightly", "small_rng"; remove old deprecated code (#1732)

Author: dhardy

.github/workflows/test.yml

@@ -104,18 +104,18 @@ jobs:
       - name: Maybe nightly
         if: ${{ matrix.toolchain == 'nightly' }}
         run: |
-          cargo test --target ${{ matrix.target }} --features=nightly
+          cargo test --target ${{ matrix.target }}
           cargo test --target ${{ matrix.target }} --all-features
           cargo test --target ${{ matrix.target }} --lib --tests --no-default-features
       - name: Test rand
         run: |
           cargo test --target ${{ matrix.target }} --lib --tests --no-default-features
-          cargo build --target ${{ matrix.target }} --no-default-features --features alloc,sys_rng,small_rng,unbiased
-          cargo test --target ${{ matrix.target }} --lib --tests --no-default-features --features=alloc,sys_rng,small_rng
+          cargo build --target ${{ matrix.target }} --no-default-features --features alloc,sys_rng,unbiased
+          cargo test --target ${{ matrix.target }} --lib --tests --no-default-features --features=alloc,sys_rng
           cargo test --target ${{ matrix.target }} --examples
       - name: Test rand (all stable features)
         run: |
-          cargo test --target ${{ matrix.target }} --features=serde,log,small_rng
+          cargo test --target ${{ matrix.target }} --features=serde,log
       - name: Test rand_pcg
         run: cargo test --target ${{ matrix.target }} --manifest-path rand_pcg/Cargo.toml --features=serde
 
@@ -146,7 +146,7 @@ jobs:
       - name: Test
         run: |
           # all stable features:
-          cross test --no-fail-fast --target ${{ matrix.target }} --features=serde,log,small_rng
+          cross test --no-fail-fast --target ${{ matrix.target }} --features=serde,log
           cross test --no-fail-fast --target ${{ matrix.target }} --examples
           cross test --no-fail-fast --target ${{ matrix.target }} --manifest-path rand_pcg/Cargo.toml --features=serde
 
@@ -162,7 +162,7 @@ jobs:
       - name: Test rand
         run: |
           cargo miri test --no-default-features --lib --tests
-          cargo miri test --features=log,small_rng
+          cargo miri test --features=log
           cargo miri test --manifest-path rand_pcg/Cargo.toml --features=serde
 
   test-no-std:

CHANGELOG.md

@@ -30,11 +30,14 @@ You may also find the [Upgrade Guide](https://rust-random.github.io/book/update.
 
 ### Removals
 - Removed `ReseedingRng` ([#1722])
+- Removed unused feature "nightly" ([#1732])
+- Removed feature `small_rng` ([#1732])
 
 [#1695]: https://github.com/rust-random/rand/pull/1695
 [#1697]: https://github.com/rust-random/rand/pull/1697
 [#1717]: https://github.com/rust-random/rand/pull/1717
 [#1722]: https://github.com/rust-random/rand/pull/1722
+[#1732]: https://github.com/rust-random/rand/pull/1732
 
 ## [0.9.2] - 2025-07-20
 ### Deprecated

Cargo.toml

@@ -24,12 +24,11 @@ all-features = true
 rustdoc-args = ["--generate-link-to-definition"]
 
 [package.metadata.playground]
-features = ["small_rng", "serde"]
+features = ["serde"]
 
 [features]
 # Meta-features:
-default = ["std", "std_rng", "sys_rng", "small_rng", "thread_rng"]
-nightly = [] # some additions requiring nightly Rust
+default = ["std", "std_rng", "sys_rng", "thread_rng"]
 serde = ["dep:serde"]
 
 # Option (enabled by default): without "std" rand uses libcore; this option
@@ -48,9 +47,6 @@ simd_support = []
 # Option (enabled by default): enable StdRng
 std_rng = ["dep:chacha20"]
 
-# Option: enable SmallRng
-small_rng = []
-
 # Option: enable ThreadRng and rng()
 thread_rng = ["std", "std_rng", "sys_rng"]
 

README.md

@@ -67,27 +67,22 @@ Rand is built with these features enabled by default:
 -   `alloc` (implied by `std`) enables functionality requiring an allocator
 -   `sys_rng` (implied by `std`) enables `rngs::SysRng`, using the [getrandom] crate
 -   `std_rng` enables inclusion of `StdRng`, `ThreadRng`
--   `small_rng` enables inclusion of the `SmallRng` PRNG
 
 Optionally, the following dependencies can be enabled:
 
 -   `log` enables logging via [log](https://crates.io/crates/log)
 
 Additionally, these features configure Rand:
 
--   `nightly` includes some additions requiring nightly Rust
--   `simd_support` (experimental) enables sampling of SIMD values
-    (uniformly random SIMD integers and floats), requiring nightly Rust
+-   `simd_support` (experimental) enables sampling of SIMD values (uniformly
+    random SIMD integers and floats). Since `std::simd` is not yet stable this
+    feature requires nightly Rust and may cause build failures.
 -   `unbiased` use unbiased sampling for algorithms supporting this option: Uniform distribution.
 
     (By default, bias affecting no more than one in  2^48 samples is accepted.)
 
     Note: enabling this option is expected to affect reproducibility of results.
 
-Note that nightly features are not stable and therefore not all library and
-compiler versions will be compatible. This is especially true of Rand's
-experimental `simd_support` feature.
-
 Rand supports limited functionality in `no_std` mode (enabled via
 `default-features = false`). In this case, `SysRng` is
 unavailable (unless `sys_rng` is enabled), large parts of `seq` are

benches/Cargo.toml

@@ -11,7 +11,7 @@ simd_support = ["rand/simd_support"]
 [dependencies]
 
 [dev-dependencies]
-rand = { path = "..", features = ["small_rng", "nightly"] }
+rand = { path = ".." }
 rand_pcg = { path = "../rand_pcg" }
 chacha20 = { version = "0.10.0-rc.10", default-features = false, features = ["rng"] }
 criterion = "0.5"

src/lib.rs

@@ -85,16 +85,6 @@ pub mod seq;
 #[cfg(feature = "thread_rng")]
 pub use crate::rngs::thread::rng;
 
-/// Access the thread-local generator
-///
-/// Use [`rand::rng()`](rng()) instead.
-#[cfg(feature = "thread_rng")]
-#[deprecated(since = "0.9.0", note = "Renamed to `rng`")]
-#[inline]
-pub fn thread_rng() -> crate::rngs::ThreadRng {
-    rng()
-}
-
 pub use rng::{Fill, RngExt};
 
 #[cfg(feature = "thread_rng")]

src/prelude.rs

@@ -20,7 +20,6 @@
 
 #[doc(no_inline)]
 pub use crate::distr::Distribution;
-#[cfg(feature = "small_rng")]
 #[doc(no_inline)]
 pub use crate::rngs::SmallRng;
 #[cfg(feature = "std_rng")]

src/rng.rs

@@ -312,44 +312,6 @@ pub trait RngExt: Rng {
     fn fill<T: Fill>(&mut self, dest: &mut [T]) {
         Fill::fill_slice(dest, self)
     }
-
-    /// Alias for [`RngExt::random`].
-    #[inline]
-    #[deprecated(
-        since = "0.9.0",
-        note = "Renamed to `random` to avoid conflict with the new `gen` keyword in Rust 2024."
-    )]
-    fn r#gen<T>(&mut self) -> T
-    where
-        StandardUniform: Distribution<T>,
-    {
-        self.random()
-    }
-
-    /// Alias for [`RngExt::random_range`].
-    #[inline]
-    #[deprecated(since = "0.9.0", note = "Renamed to `random_range`")]
-    fn gen_range<T, R>(&mut self, range: R) -> T
-    where
-        T: SampleUniform,
-        R: SampleRange<T>,
-    {
-        self.random_range(range)
-    }
-
-    /// Alias for [`RngExt::random_bool`].
-    #[inline]
-    #[deprecated(since = "0.9.0", note = "Renamed to `random_bool`")]
-    fn gen_bool(&mut self, p: f64) -> bool {
-        self.random_bool(p)
-    }
-
-    /// Alias for [`RngExt::random_ratio`].
-    #[inline]
-    #[deprecated(since = "0.9.0", note = "Renamed to `random_ratio`")]
-    fn gen_ratio(&mut self, numerator: u32, denominator: u32) -> bool {
-        self.random_ratio(numerator, denominator)
-    }
 }
 
 impl<R: Rng + ?Sized> RngExt for R {}

src/rngs/mod.rs

@@ -94,23 +94,17 @@
 //! [PCG]: https://www.pcg-random.org/
 //! [xoshiro]: https://prng.di.unimi.it/
 
-#[cfg(feature = "small_rng")]
 mod small;
-#[cfg(feature = "small_rng")]
 mod xoshiro128plusplus;
-#[cfg(feature = "small_rng")]
 mod xoshiro256plusplus;
 
 #[cfg(feature = "std_rng")]
 mod std;
 #[cfg(feature = "thread_rng")]
 pub(crate) mod thread;
 
-#[cfg(feature = "small_rng")]
 pub use self::small::SmallRng;
-#[cfg(feature = "small_rng")]
 pub use xoshiro128plusplus::Xoshiro128PlusPlus;
-#[cfg(feature = "small_rng")]
 pub use xoshiro256plusplus::Xoshiro256PlusPlus;
 
 #[cfg(feature = "std_rng")]

src/seq/iterator.rs

@@ -263,7 +263,7 @@ pub trait IteratorRandom: Iterator + Sized {
     }
 
     /// Deprecated: use [`Self::sample_fill`] instead
-    #[deprecated(since = "0.9.2", note = "Renamed to `sample_fill`")]
+    #[deprecated(since = "0.10.0", note = "Renamed to `sample_fill`")]
     fn choose_multiple_fill<R>(self, rng: &mut R, buf: &mut [Self::Item]) -> usize
     where
         R: Rng + ?Sized,
@@ -273,7 +273,7 @@ pub trait IteratorRandom: Iterator + Sized {
 
     /// Deprecated: use [`Self::sample`] instead
     #[cfg(feature = "alloc")]
-    #[deprecated(since = "0.9.2", note = "Renamed to `sample`")]
+    #[deprecated(since = "0.10.0", note = "Renamed to `sample`")]
     fn choose_multiple<R>(self, rng: &mut R, amount: usize) -> Vec<Self::Item>
     where
         R: Rng + ?Sized,