#![allow(unused)]

fn main() {
    mut_range_bound_upper();
    mut_range_bound_lower();
    mut_range_bound_both();
    mut_range_bound_no_mutation();
    immut_range_bound();
    mut_borrow_range_bound();
    immut_borrow_range_bound();
}

fn mut_range_bound_upper() {
    let mut m = 4;
    for i in 0..m {
        m = 5;
    } // warning
}

fn mut_range_bound_lower() {
    let mut m = 4;
    for i in m..10 {
        m *= 2;
    } // warning
}

fn mut_range_bound_both() {
    let mut m = 4;
    let mut n = 6;
    for i in m..n {
        m = 5;
        n = 7;
    } // warning (1 for each mutated bound)
}

fn mut_range_bound_no_mutation() {
    let mut m = 4;
    for i in 0..m {
        continue;
    } // no warning
}

fn mut_borrow_range_bound() {
    let mut m = 4;
    for i in 0..m {
        let n = &mut m; // warning
        *n += 1;
    }
}

fn immut_borrow_range_bound() {
    let mut m = 4;
    for i in 0..m {
        let n = &m; // should be no warning?
    }
}

fn immut_range_bound() {
    let m = 4;
    for i in 0..m {
        continue;
    } // no warning
}
