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deref the argument of overloaded MIR autoderef
Fixes #31466
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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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#![feature(rustc_attrs)] | ||
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use std::ops::{Deref, DerefMut}; | ||
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pub struct MyRef(u32); | ||
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impl Deref for MyRef { | ||
type Target = u32; | ||
fn deref(&self) -> &u32 { &self.0 } | ||
} | ||
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impl DerefMut for MyRef { | ||
fn deref_mut(&mut self) -> &mut u32 { &mut self.0 } | ||
} | ||
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#[rustc_mir] | ||
fn deref(x: &MyRef) -> &u32 { | ||
x | ||
} | ||
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#[rustc_mir] | ||
fn deref_mut(x: &mut MyRef) -> &mut u32 { | ||
x | ||
} | ||
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fn main() { | ||
let mut r = MyRef(2); | ||
assert_eq!(deref(&r) as *const _, &r.0 as *const _); | ||
assert_eq!(deref_mut(&mut r) as *mut _, &mut r.0 as *mut _); | ||
} |