75 lines
1.5 KiB
Rust
75 lines
1.5 KiB
Rust
#![feature(plugin)]
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#![plugin(clippy)]
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#![deny(useless_vec)]
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#[derive(Debug)]
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struct NonCopy;
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fn on_slice(_: &[u8]) {}
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#[allow(ptr_arg)]
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fn on_vec(_: &Vec<u8>) {}
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struct Line {
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length: usize,
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}
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impl Line {
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fn length(&self) -> usize {
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self.length
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}
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}
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fn main() {
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on_slice(&vec![]);
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//~^ ERROR useless use of `vec!`
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//~| HELP you can use
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//~| SUGGESTION on_slice(&[])
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on_slice(&[]);
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on_slice(&vec![1, 2]);
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//~^ ERROR useless use of `vec!`
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//~| HELP you can use
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//~| SUGGESTION on_slice(&[1, 2])
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on_slice(&[1, 2]);
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on_slice(&vec ![1, 2]);
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//~^ ERROR useless use of `vec!`
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//~| HELP you can use
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//~| SUGGESTION on_slice(&[1, 2])
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on_slice(&[1, 2]);
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on_slice(&vec!(1, 2));
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//~^ ERROR useless use of `vec!`
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//~| HELP you can use
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//~| SUGGESTION on_slice(&[1, 2])
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on_slice(&[1, 2]);
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on_slice(&vec![1; 2]);
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//~^ ERROR useless use of `vec!`
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//~| HELP you can use
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//~| SUGGESTION on_slice(&[1; 2])
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on_slice(&[1; 2]);
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on_vec(&vec![]);
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on_vec(&vec![1, 2]);
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on_vec(&vec![1; 2]);
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// Now with non-constant expressions
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let line = Line { length: 2 };
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on_slice(&vec![2; line.length]);
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on_slice(&vec![2; line.length()]);
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for a in vec![1, 2, 3] {
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//~^ ERROR useless use of `vec!`
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//~| HELP you can use
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//~| SUGGESTION for a in &[1, 2, 3] {
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println!("{:?}", a);
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}
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for a in vec![NonCopy, NonCopy] {
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println!("{:?}", a);
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}
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}
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