gistfile1.txt

fn minimize<F>(func: F)                                                                                  
where                                                                                                    
    F: for<'r> Fn(f64, &'r mut f64) -> f64                                                               
{                                                                                                        
    let mmtype: rgsl::MinimizerType<f64> = rgsl::MinimizerType::brent();                                 
    let mut mm: rgsl::Minimizer<f64> = rgsl::Minimizer::new(&mmtype).unwrap();                           
    let lambda = 0.5;                                                                                    
    mm.set(func, &mut lambda, 0.5, 0.0, 1.0);                                                            
    match rgsl::minimizer::test_interval(0.0, 1.0, 1e-6, 0.0) {                                          
    ¦   rgsl::Value::Success => p!("Lambda: {}", mm.x_minimum()),                                        
    ¦   _ => p!("Failed to converge!")                                                                   
    }                                                                                                    
}