add Debug trait to pub trait Num

src/lib.rs

@@ -22,7 +22,7 @@
 #[cfg(feature = "std")]
 extern crate std;
 
-use core::fmt;
+use core::fmt::{self, Debug};
 use core::num::Wrapping;
 use core::ops::{Add, Div, Mul, Rem, Sub};
 use core::ops::{AddAssign, DivAssign, MulAssign, RemAssign, SubAssign};
@@ -64,7 +64,7 @@ pub mod sign;
 
 /// The base trait for numeric types, covering `0` and `1` values,
 /// comparisons, basic numeric operations, and string conversion.
-pub trait Num: PartialEq + Zero + One + NumOps {
+pub trait Num: PartialEq + Zero + One + NumOps + Debug {
     type FromStrRadixErr;
 
     /// Convert from a string and radix (typically `2..=36`).
@@ -203,7 +203,7 @@ impl fmt::Display for ParseFloatError {
             FloatErrorKind::Invalid => "invalid float literal",
         };
 
-        description.fmt(f)
+        fmt::Display::fmt(description, f)
     }
 }
 

tests/num_impl_debug.rs

@@ -0,0 +1,20 @@
+#[test]
+fn test_if_num_impl_debug() {
+    use num_traits::Num;
+    use std::ops::Add;
+    pub struct LengthNArrayOfTypeT<const N: usize, T: Num>([T; N]);
+    impl<const N: usize, T: Num + Clone> Add for LengthNArrayOfTypeT<N, T> {
+        type Output = Self;
+        fn add(self, rhs: Self) -> Self {
+            LengthNArrayOfTypeT(
+                self.0
+                    .iter()
+                    .zip(rhs.0.iter())
+                    .map(|(a, b)| a.clone() + b.clone())
+                    .collect::<Vec<T>>()
+                    .try_into()
+                    .unwrap(),
+            )
+        }
+    }
+}