rust/tests/ui/mut_range_bound.rs
2019-01-08 21:46:39 +01:00

64 lines
1.1 KiB
Rust

#![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
}