Function adder 

pub fn adder<S: Into<String>>(
    g: &mut GateGraphBuilder,
    cin: GateIndex,
    input1: &[GateIndex],
    input2: &[GateIndex],
    name: S,
) -> Vec<GateIndex>

Returns the output of a ripple carry adder.

Takes two inputs of any width and a carry in, the output will be the same width as the inputs.

Example

let input1 = constant(3u8);
let input2 = constant(5u8);

// Notice the carry in bit is on.
let result = adder(&mut g, ON, &input1, &input2, "adder");
let output = g.output(&result, "result");

let ig = &g.init();
assert_eq!(output.u8(ig), 9);

Panics

Will panic if input1.len() != input2.len().