rust/tests/ui/borrowck/suggest-mut-iterator.rs
Esteban Küber c1a7af0f2a Suggest mutable borrow on read only for-loop that should be mutable
```
error[E0596]: cannot borrow `*test` as mutable, as it is behind a `&` reference
  --> $DIR/suggest-mut-iterator.rs:22:9
   |
LL |     for test in &tests {
   |                 ------ this iterator yields `&` references
LL |         test.add(2);
   |         ^^^^ `test` is a `&` reference, so the data it refers to cannot be borrowed as mutable
   |
help: use a mutable iterator instead
   |
LL |     for test in &mut tests {
   |                  +++
```

Address #114311.
2023-08-23 21:46:18 +00:00

31 lines
565 B
Rust

// run-rustfix
struct Test {
a: u32
}
impl Test {
pub fn add(&mut self, value: u32) {
self.a += value;
}
pub fn print_value(&self) {
println!("Value of a is: {}", self.a);
}
}
fn main() {
let mut tests = Vec::new();
for i in 0..=10 {
tests.push(Test {a: i});
}
for test in &tests {
test.add(2); //~ ERROR cannot borrow `*test` as mutable, as it is behind a `&` reference
}
for test in &mut tests {
test.add(2);
}
for test in &tests {
test.print_value();
}
}