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

    /// 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 {
        #[inline]
        /// Tests if `Self` the same as the type `T`
        ///
        /// Typically used to test of `Self` is a f32 or a f64 with `N::is::<f32>()`.
        fn is<T: Scalar>() -> bool {
            TypeId::of::<Self>() == TypeId::of::<T>()
        }
    }
    impl<T: Copy + PartialEq + Debug + Any> Scalar for T {}

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