123 lines
2.0 KiB
Rust
123 lines
2.0 KiB
Rust
//@aux-build:proc_macro_derive.rs
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#![warn(clippy::shadow_same, clippy::shadow_reuse, clippy::shadow_unrelated)]
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#![allow(
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clippy::let_unit_value,
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clippy::needless_if,
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clippy::redundant_guards,
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clippy::redundant_locals
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)]
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extern crate proc_macro_derive;
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#[derive(proc_macro_derive::ShadowDerive)]
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pub struct Nothing;
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macro_rules! reuse {
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($v:ident) => {
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let $v = $v + 1;
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};
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}
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fn shadow_same() {
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let x = 1;
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let x = x;
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let mut x = &x;
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let x = &mut x;
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let x = *x;
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}
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fn shadow_reuse() -> Option<()> {
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let x = ([[0]], ());
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let x = x.0;
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let x = x[0];
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let [x] = x;
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let x = Some(x);
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let x = foo(x);
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let x = || x;
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let x = Some(1).map(|_| x)?;
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let y = 1;
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let y = match y {
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1 => 2,
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_ => 3,
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};
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None
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}
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fn shadow_reuse_macro() {
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let x = 1;
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// this should not warn
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reuse!(x);
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}
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fn shadow_unrelated() {
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let x = 1;
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let x = 2;
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}
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fn syntax() {
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fn f(x: u32) {
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let x = 1;
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}
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let x = 1;
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match Some(1) {
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Some(1) => {},
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Some(x) => {
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let x = 1;
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},
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_ => {},
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}
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if let Some(x) = Some(1) {}
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while let Some(x) = Some(1) {}
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let _ = |[x]: [u32; 1]| {
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let x = 1;
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};
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let y = Some(1);
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if let Some(y) = y {}
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}
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fn negative() {
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match Some(1) {
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Some(x) if x == 1 => {},
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Some(x) => {},
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None => {},
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}
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match [None, Some(1)] {
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[Some(x), None] | [None, Some(x)] => {},
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_ => {},
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}
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if let Some(x) = Some(1) {
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let y = 1;
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} else {
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let x = 1;
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let y = 1;
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}
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let x = 1;
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#[allow(clippy::shadow_unrelated)]
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let x = 1;
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}
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fn foo<T>(_: T) {}
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fn question_mark() -> Option<()> {
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let val = 1;
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// `?` expands with a `val` binding
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None?;
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None
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}
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pub async fn foo1(_a: i32) {}
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pub async fn foo2(_a: i32, _b: i64) {
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let _b = _a;
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}
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fn ice_8748() {
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let _ = [0; {
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let x = 1;
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if let Some(x) = Some(1) { x } else { 1 }
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}];
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}
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fn main() {}
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