number-diff 0.1.4

number-based is an attempt of mine to make working with calculus easier.
Documentation 
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use crate::Elementary;
use crate::Function;

impl FnOnce<(f64,)> for Function {
    type Output = f64;
    extern "rust-call" fn call_once(self, args: (f64,)) -> Self::Output {
        self.elementary().clone().call()(args.0)
    }
}

impl FnMut<(f64,)> for Function {
    extern "rust-call" fn call_mut(&mut self, args: (f64,)) -> Self::Output {
        self.elementary().clone().call()(args.0)
    }
}

impl Fn<(f64,)> for Function {
    extern "rust-call" fn call(&self, args: (f64,)) -> Self::Output {
        self.elementary().clone().call()(args.0)
    }
}