tensors-rs 0.1.2

Compact NumPy-like dense tensor primitives for safe numerical Rust.
Documentation 
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//! Numeric traits used internally by kernels.

use core::fmt::Debug;
use core::iter::Sum;
use core::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Sub, SubAssign};

/// Floating point scalar supported by numerical kernels.
pub trait Float:
    Copy
    + Clone
    + Default
    + Debug
    + PartialEq
    + PartialOrd
    + Send
    + Sync
    + Sum
    + Add<Output = Self>
    + AddAssign
    + Sub<Output = Self>
    + SubAssign
    + Mul<Output = Self>
    + MulAssign
    + Div<Output = Self>
    + DivAssign
    + Neg<Output = Self>
    + 'static
{
    /// Additive identity.
    fn zero() -> Self;
    /// Multiplicative identity.
    fn one() -> Self;
    /// Convert from `f64`.
    fn from_f64(value: f64) -> Self;
    /// Convert to `f64`.
    fn to_f64(self) -> f64;
    /// Square root.
    fn sqrt(self) -> Self;
    /// Absolute value.
    fn abs(self) -> Self;
    /// Whether the value is finite.
    fn is_finite(self) -> bool;
}

impl Float for f32 {
    #[inline]
    fn zero() -> Self {
        0.0
    }

    #[inline]
    fn one() -> Self {
        1.0
    }

    #[inline]
    fn from_f64(value: f64) -> Self {
        value as f32
    }

    #[inline]
    fn to_f64(self) -> f64 {
        self as f64
    }

    #[inline]
    fn sqrt(self) -> Self {
        f32::sqrt(self)
    }

    #[inline]
    fn abs(self) -> Self {
        f32::abs(self)
    }

    #[inline]
    fn is_finite(self) -> bool {
        f32::is_finite(self)
    }
}

impl Float for f64 {
    #[inline]
    fn zero() -> Self {
        0.0
    }

    #[inline]
    fn one() -> Self {
        1.0
    }

    #[inline]
    fn from_f64(value: f64) -> Self {
        value
    }

    #[inline]
    fn to_f64(self) -> f64 {
        self
    }

    #[inline]
    fn sqrt(self) -> Self {
        f64::sqrt(self)
    }

    #[inline]
    fn abs(self) -> Self {
        f64::abs(self)
    }

    #[inline]
    fn is_finite(self) -> bool {
        f64::is_finite(self)
    }
}