mirror of https://github.com/rust-lang/rust.git
39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
#![feature(plugin)]
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#![plugin(clippy)]
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#![deny(clippy, clippy_pedantic)]
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#![allow(unused_parens, unused_variables, missing_docs_in_private_items)]
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fn id<T>(x: T) -> T { x }
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fn first(x: (isize, isize)) -> isize { x.0 }
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fn main() {
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let mut x = 1;
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let x = &mut x; //~ERROR `x` is shadowed by itself in `&mut x`
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let x = { x }; //~ERROR `x` is shadowed by itself in `{ x }`
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let x = (&*x); //~ERROR `x` is shadowed by itself in `(&*x)`
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let x = { *x + 1 }; //~ERROR `x` is shadowed by `{ *x + 1 }` which reuses
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let x = id(x); //~ERROR `x` is shadowed by `id(x)` which reuses
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let x = (1, x); //~ERROR `x` is shadowed by `(1, x)` which reuses
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let x = first(x); //~ERROR `x` is shadowed by `first(x)` which reuses
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let y = 1;
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let x = y; //~ERROR `x` is shadowed by `y`
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let x; //~ERROR `x` shadows a previous declaration
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x = 42;
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let o = Some(1_u8);
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if let Some(p) = o { assert_eq!(1, p); }
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match o {
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Some(p) => p, // no error, because the p above is in its own scope
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None => 0,
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};
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match (x, o) {
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(1, Some(a)) | (a, Some(1)) => (), // no error though `a` appears twice
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_ => (),
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}
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}
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