mirror of https://github.com/rust-lang/rust.git
21 lines
528 B
Rust
21 lines
528 B
Rust
// Test that we are able to infer a suitable kind for this closure
|
|
// that is just called (`FnMut`).
|
|
|
|
fn main() {
|
|
let mut counter = 0;
|
|
|
|
// Here this must be inferred to FnMut so that it can mutate counter,
|
|
// but we forgot the mut.
|
|
let tick1 = || {
|
|
counter += 1;
|
|
};
|
|
|
|
// In turn, tick2 must be inferred to FnMut so that it can call
|
|
// tick1, but we forgot the mut.
|
|
let tick2 = || {
|
|
tick1(); //~ ERROR cannot borrow `tick1` as mutable
|
|
};
|
|
|
|
tick2(); //~ ERROR cannot borrow
|
|
}
|