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use std::convert::From;
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#[allow(dead_code)]
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#[derive(Debug)]
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struct Number {
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value: i32,
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}
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impl From<i32> for Number {
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fn from(item: i32) -> Self {
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Number { value: item }
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}
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}
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fn main() {
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let num = Number::from(30);
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println!("My number is {:?}", num);
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}
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