dfdx 0.13.0

Ergonomic auto differentiation in Rust, with pytorch like apis.
Documentation 
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mod allocate;
mod device;
mod index;
mod iterate;

pub(crate) use index::index_to_i;
pub(crate) use iterate::{LendingIterator, NdIndex};

pub(crate) use device::CachableVec;
pub use device::{Cpu, CpuError};

#[cfg(test)]
mod tests {
    use super::*;
    use crate::{shapes::*, tensor::*};

    #[test]
    fn test_empty_cache() {
        let dev: Cpu = Default::default();
        dev.enable_cache();
        let tensor: Tensor<Rank2<2, 3>, f32, _> = dev.zeros();
        drop(tensor); // insert allocation into cache
        assert_eq!(dev.cache.len(), 1);
        dev.empty_cache();
        assert_eq!(dev.cache.len(), 0);
    }

    #[test]
    fn test_disabling_cache_empties_it() {
        let dev: Cpu = Default::default();
        dev.enable_cache();
        let tensor: Tensor<Rank2<2, 3>, f32, _> = dev.zeros();
        drop(tensor); // insert allocation into cache
        assert_eq!(dev.cache.len(), 1);
        dev.disable_cache();
        assert_eq!(dev.cache.len(), 0);
    }

    #[test]
    fn test_reuse_allocation_on_new_tensor() {
        let dev: Cpu = Default::default();
        dev.enable_cache();
        assert_eq!(dev.cache.len(), 0);
        let tensor: Tensor<Rank2<2, 3>, f32, _> = dev.zeros();
        assert_eq!(dev.cache.len(), 0);
        let ptr = tensor.data.as_ptr();
        drop(tensor); // insert allocation into cache
        assert_eq!(dev.cache.len(), 1);
        let other: Tensor<Rank2<2, 3>, f64, _> = dev.zeros();
        assert_eq!(dev.cache.len(), 1);
        let tensor: Tensor<Rank2<2, 3>, f32, _> = dev.zeros();
        assert_eq!(dev.cache.len(), 0);
        assert_eq!(tensor.data.as_ptr(), ptr);
        drop(other);
    }

    #[test]
    fn test_reuse_allocation_on_clone_tensor() {
        let dev: Cpu = Default::default();
        dev.enable_cache();
        let a: Tensor<Rank2<2, 3>, f32, _> = dev.zeros();
        let b: Tensor<Rank2<2, 3>, f32, _> = dev.zeros();
        drop(b); // insert allocation into cache
        assert_eq!(dev.cache.len(), 1);
        let mut b = a.clone();
        assert_eq!(dev.cache.len(), 1);
        // will actually clone the data - should reuse allocation from cache
        std::sync::Arc::make_mut(&mut b.data);
        assert_eq!(dev.cache.len(), 0);
    }
}