85 lines
1.8 KiB
Rust
85 lines
1.8 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![warn(clippy::temporary_assignment)]
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use std::ops::{Deref, DerefMut};
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struct TupleStruct(i32);
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struct Struct {
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field: i32,
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}
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struct MultiStruct {
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structure: Struct,
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}
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struct Wrapper<'a> {
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inner: &'a mut Struct,
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}
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impl<'a> Deref for Wrapper<'a> {
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type Target = Struct;
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fn deref(&self) -> &Struct {
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self.inner
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}
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}
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impl<'a> DerefMut for Wrapper<'a> {
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fn deref_mut(&mut self) -> &mut Struct {
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self.inner
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}
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}
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struct ArrayStruct {
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array: [i32; 1],
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}
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const A: TupleStruct = TupleStruct(1);
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const B: Struct = Struct { field: 1 };
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const C: MultiStruct = MultiStruct {
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structure: Struct { field: 1 },
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};
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const D: ArrayStruct = ArrayStruct { array: [1] };
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fn main() {
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let mut s = Struct { field: 0 };
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let mut t = (0, 0);
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Struct { field: 0 }.field = 1;
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MultiStruct {
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structure: Struct { field: 0 },
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}
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.structure
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.field = 1;
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ArrayStruct { array: [0] }.array[0] = 1;
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(0, 0).0 = 1;
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A.0 = 2;
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B.field = 2;
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C.structure.field = 2;
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D.array[0] = 2;
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// no error
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s.field = 1;
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t.0 = 1;
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Wrapper { inner: &mut s }.field = 1;
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let mut a_mut = TupleStruct(1);
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a_mut.0 = 2;
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let mut b_mut = Struct { field: 1 };
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b_mut.field = 2;
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let mut c_mut = MultiStruct {
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structure: Struct { field: 1 },
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};
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c_mut.structure.field = 2;
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let mut d_mut = ArrayStruct { array: [1] };
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d_mut.array[0] = 2;
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}
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