Function bisection_interval 

pub fn bisection_interval<F>(
    f: F,
    interval: Interval<f64>,
    options: RootOptions,
) -> Result<f64, RootError>
where
    F: Fn(f64) -> f64,

Finds a root with the bisection method over a bounded use-interval interval.

Unbounded and empty intervals return RootError::InvalidInterval. Open endpoints participate in bracketing, but only closed endpoints are eligible for the immediate endpoint-root fast path.

Errors

Returns RootError::InvalidInterval when the interval is empty, unbounded, or does not bracket a root; RootError::InvalidTolerance when the tolerance is not finite and positive; RootError::NonFiniteValue when a function evaluation is non-finite; and RootError::MaxIterationsReached when the iteration budget is exhausted without convergence.