41 lines
959 B
Rust
41 lines
959 B
Rust
#![feature(plugin)]
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#![plugin(clippy)]
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#![deny(clippy)]
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#![allow(unused)]
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fn the_answer(ref mut x: u8) { //~ ERROR `ref` directly on a function argument is ignored
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*x = 42;
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}
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fn main() {
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let mut x = 0;
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the_answer(x);
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// Closures should not warn
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let y = |ref x| { println!("{:?}", x) };
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y(1u8);
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let ref x = 1;
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//~^ ERROR `ref` on an entire `let` pattern is discouraged
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//~| HELP try
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//~| SUGGESTION let x = &1;
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let ref y: (&_, u8) = (&1, 2);
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//~^ ERROR `ref` on an entire `let` pattern is discouraged
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//~| HELP try
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//~| SUGGESTION let y: &(&_, u8) = &(&1, 2);
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let ref z = 1 + 2;
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//~^ ERROR `ref` on an entire `let` pattern is discouraged
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//~| HELP try
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//~| SUGGESTION let z = &(1 + 2);
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let ref mut z = 1 + 2;
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//~^ ERROR `ref` on an entire `let` pattern is discouraged
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//~| HELP try
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//~| SUGGESTION let z = &mut (1 + 2);
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let (ref x, _) = (1,2); // okay, not top level
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println!("The answer is {}.", x);
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}
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