Use const-generics to support arrays of all sizes

src/distributions/other.rs

@@ -16,6 +16,9 @@ use crate::Rng;
 
 #[cfg(feature = "serde1")]
 use serde::{Serialize, Deserialize};
+#[cfg(feature = "min_const_gen")]
+use std::mem::{self, MaybeUninit};
+
 
 // ----- Sampling distributions -----
 
@@ -158,18 +161,17 @@ tuple_impl! {A, B, C, D, E, F, G, H, I, J, K, L}
 
 #[cfg(feature = "min_const_gen")]
 impl<T, const N: usize> Distribution<[T; N]> for Standard
-where
-    Standard: Distribution<T>,
-    T: Default + Copy,
+where Standard: Distribution<T>
 {
     #[inline]
     fn sample<R: Rng + ?Sized>(&self, _rng: &mut R) -> [T; N] {
-        let mut sample = [Default::default(); N];
-        for elem in &mut sample {
-            *elem = _rng.gen();
+        let mut buff: [MaybeUninit<T>; N] = unsafe { MaybeUninit::uninit().assume_init() };
+
+        for elem in &mut buff {
+            *elem = MaybeUninit::new(_rng.gen());
         }
 
-        sample
+        unsafe { mem::transmute_copy::<_, _>(&buff) }
     }
 }