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Partial Function

A clean way to define function as a set of smaller functions where each has defined start and end bounds.

Partial Function

Achieves the following:

f(x) = {
x if 0 <= x < 5
x * 2 if 5 <= x <= 10
}

Expressed as:

let p = PartialFunction::new().with(0.0,5.0,Box::new(|x| x )).with(5.0,10.0,Box::new(|x| x *2)).build();assert_eq!(p.eval(5.0),Some(10.0));

or even as:

let p = partfn!{[0.0,5.0]: x -> x,[5.0,10.0]: x -> x *2,};assert_eq!(p.eval(5.0),Some(10.0));

Lower Partial Function

Achieves the following:

f(x) = {
x if 0 <= x < 5
x * 2 if 5 <= x
}

Expressed as:

let f = LowerPartialFunction::new().with(0.0,Box::new(|x| x )).with(5.0,Box::new(|x| x *2)).build();assert_eq!(f.eval(5.0),Some(10.0));

or even as:

let f = lowpartfn!{[0.0]: x -> x,[5.0]: x -> x *2,};assert_eq!(f.eval(5.0),Some(10.0));

Adding To Your Project

Add the following to your Cargo.toml:

partial_function = "0.5.0"