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