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trait Red {}
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struct Ball<'a> {
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diameter: &'a i32,
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}
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impl<'a> Red for Ball<'a> {}
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struct StrWrap<'a>(&'a str);
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fn foo(string: &str) -> StrWrap<'_> { // Anonymous lifetime
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StrWrap(string)
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}
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fn main() {
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let num = 5;
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let obj = Box::new(Ball { diameter: &num}) as Box<dyn Red>;
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}
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