Macro autodiff 

autodiff!() { /* proc-macro */ }

Compute the partial derivative of a given expression w.r.t a particular variable. At the moment, the macro only supports expressions defined within the same scope.

Examples

Basic arithmetic

extern crate rsdiff_macros as macros;

use macros::autodiff;

fn main() {
    let x = 3f64;
    let y = 4f64;

    assert_eq!(y, autodiff!(x: x * y));
    assert_eq!(x, autodiff!(y: x * y));
    assert_eq!(1f64, autodiff!(x: x + y));
}

Trigonometric functions

extern crate rsdiff_macros as macros;

use macros::autodiff;

fn main() {
    let x = 2f64;
    assert_eq!(autodiff!(x: x.cos()), -x.sin());
    assert_eq!(autodiff!(x: x.sin()), x.cos());
    assert_eq!(autodiff!(x: x.tan()), x.cos().powi(2).recip());
}