{"id":18856,"date":"2022-11-02T04:38:08","date_gmt":"2022-11-01T23:08:08","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-dropping-partially-moved-values-after-the-moved-values-are-dropped\/"},"modified":"2022-11-02T04:38:08","modified_gmt":"2022-11-01T23:08:08","slug":"solved-dropping-partially-moved-values-after-the-moved-values-are-dropped","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-dropping-partially-moved-values-after-the-moved-values-are-dropped\/","title":{"rendered":"[Solved] Dropping partially moved values after the moved values are dropped"},"content":{"rendered":"

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Is there a better way to fix this<\/p>\n<\/blockquote>\n

Yes, but not in stable Rust. You need non-lexical lifetimes<\/em>:<\/p>\n

#![feature(nll)]\n\n#[derive(Debug)]\nstruct Foo(u32);\n\nfn get_foo(bar: &mut Foo) -> Option<&mut u32> {\n    Some(&mut bar.0)\n}\n\npub fn test() {\n    let x = 5;\n    let y = 6;\n    let mut a = Foo(x);\n\n    let b = get_foo(&mut a);\n\n    if let Some(value) = b {\n        *value = y;\n    }\n\n    println!(\"{:?}\", a);\n}\n\nfn main() {}\n<\/code><\/pre>\n
Until then, just use the extra block.<\/p>\n
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Dropping the value of b doesn’t work either<\/p>\n<\/blockquote>\n
drop<\/code> has nothing to do with borrows.<\/p>\n
See also:<\/p>\n