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//@aux-build:proc_macros.rs
#![allow(unused, clippy::no_effect, clippy::needless_pass_by_ref_mut)]
#![warn(clippy::redundant_locals)]
extern crate proc_macros;
use proc_macros::{external, with_span};
fn main() {}
fn immutable() {
let x = 1;
let x = x;
}
fn mutable() {
let mut x = 1;
let mut x = x;
}
fn upgraded_mutability() {
let x = 1;
let mut x = x;
}
fn downgraded_mutability() {
let mut x = 1;
let x = x;
}
// see #11290
fn shadow_mutation() {
let mut x = 1;
{
let mut x = x;
x = 2;
}
}
fn coercion(par: &mut i32) {
let par: &i32 = par;
let x: &mut i32 = &mut 1;
let x: &i32 = x;
}
fn parameter(x: i32) {
let x = x;
}
fn many() {
let x = 1;
let x = x;
let x = x;
let x = x;
let x = x;
}
fn interleaved() {
let a = 1;
let b = 2;
let a = a;
let b = b;
}
fn block() {
{
let x = 1;
let x = x;
}
}
fn closure() {
|| {
let x = 1;
let x = x;
};
|x: i32| {
let x = x;
};
}
fn consequential_drop_order() {
use std::sync::Mutex;
let mutex = Mutex::new(1);
let guard = mutex.lock().unwrap();
{
let guard = guard;
}
}
fn inconsequential_drop_order() {
let x = 1;
{
let x = x;
}
}
fn macros() {
macro_rules! rebind {
($x:ident) => {
let $x = 1;
let $x = $x;
};
}
rebind!(x);
external! {
let x = 1;
let x = x;
}
with_span! {
span
let x = 1;
let x = x;
}
let x = 10;
macro_rules! rebind_outer_macro {
($x:ident) => {
let x = x;
};
}
rebind_outer_macro!(y);
}
struct WithDrop(usize);
impl Drop for WithDrop {
fn drop(&mut self) {}
}
struct InnerDrop(WithDrop);
struct ComposeDrop {
d: WithDrop,
}
struct WithoutDrop(usize);
fn drop_trait() {
let a = WithDrop(1);
let b = WithDrop(2);
let a = a;
}
fn without_drop() {
let a = WithoutDrop(1);
let b = WithoutDrop(2);
let a = a;
}
fn drop_inner() {
let a = InnerDrop(WithDrop(1));
let b = InnerDrop(WithDrop(2));
let a = a;
}
fn drop_compose() {
let a = ComposeDrop { d: WithDrop(1) };
let b = ComposeDrop { d: WithDrop(1) };
let a = a;
}
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