101 lines
2.2 KiB
Rust
101 lines
2.2 KiB
Rust
#![allow(unused)]
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fn main() {}
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fn mut_range_bound_upper() {
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let mut m = 4;
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for i in 0..m {
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m = 5;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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}
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}
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fn mut_range_bound_lower() {
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let mut m = 4;
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for i in m..10 {
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m *= 2;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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}
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}
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fn mut_range_bound_both() {
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let mut m = 4;
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let mut n = 6;
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for i in m..n {
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m = 5;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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n = 7;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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}
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}
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fn mut_range_bound_no_mutation() {
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let mut m = 4;
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for i in 0..m {
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continue;
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} // no warning
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}
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fn mut_borrow_range_bound() {
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let mut m = 4;
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for i in 0..m {
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let n = &mut m;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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*n += 1;
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}
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}
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fn immut_borrow_range_bound() {
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let mut m = 4;
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for i in 0..m {
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let n = &m;
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}
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}
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fn immut_range_bound() {
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let m = 4;
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for i in 0..m {
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continue;
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} // no warning
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}
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fn mut_range_bound_break() {
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let mut m = 4;
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for i in 0..m {
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if m == 4 {
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m = 5; // no warning because of immediate break
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break;
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}
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}
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}
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fn mut_range_bound_no_immediate_break() {
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let mut m = 4;
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for i in 0..m {
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// warning because it is not immediately followed by break
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m = 2;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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if m == 4 {
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break;
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}
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}
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let mut n = 3;
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for i in n..10 {
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if n == 4 {
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// FIXME: warning because it is not immediately followed by break
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n = 1;
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//~^ ERROR: attempt to mutate range bound within loop
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//~| NOTE: the range of the loop is unchanged
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let _ = 2;
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break;
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}
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}
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}
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