mirror of https://github.com/rust-lang/rust
48 lines
621 B
Rust
48 lines
621 B
Rust
//@ run-pass
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#![allow(dead_code)]
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#![deny(unused_mut)]
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#[derive(Debug)]
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struct A {}
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fn init_a() -> A {
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A {}
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}
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#[derive(Debug)]
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struct B<'a> {
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ed: &'a mut A,
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}
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fn init_b<'a>(ed: &'a mut A) -> B<'a> {
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B { ed }
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}
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#[derive(Debug)]
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struct C<'a> {
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pd: &'a mut B<'a>,
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}
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fn init_c<'a>(pd: &'a mut B<'a>) -> C<'a> {
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C { pd }
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}
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#[derive(Debug)]
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struct D<'a> {
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sd: &'a mut C<'a>,
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}
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fn init_d<'a>(sd: &'a mut C<'a>) -> D<'a> {
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D { sd }
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}
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fn main() {
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let mut a = init_a();
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let mut b = init_b(&mut a);
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let mut c = init_c(&mut b);
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let d = init_d(&mut c);
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println!("{:?}", d)
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}
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