mirror of https://github.com/rust-lang/rust
21 lines
563 B
Rust
21 lines
563 B
Rust
//@ run-pass
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// Example taken from RFC 1238 text
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// https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
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// #examples-of-code-that-must-continue-to-work
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use std::cell::Cell;
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struct Concrete<'a>(#[allow(dead_code)] u32, Cell<Option<&'a Concrete<'a>>>);
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struct Foo<T> { data: Vec<T> }
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fn main() {
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let mut foo = Foo { data: Vec::new() };
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foo.data.push(Concrete(0, Cell::new(None)));
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foo.data.push(Concrete(0, Cell::new(None)));
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foo.data[0].1.set(Some(&foo.data[1]));
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foo.data[1].1.set(Some(&foo.data[0]));
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}
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