nalgebra/src/core/scalar.rs

use std::fmt::Debug;
use std::any::Any;

/// The basic scalar type for all structures of `nalgebra`.
///
/// This does not make any assumption on the algebraic properties of `Self`.
pub trait Scalar: Copy + PartialEq + Debug + Any {
}
impl<T: Copy + PartialEq + Debug + Any> Scalar for T { }