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rustlang try from
Happy Hoopoe
on Oct 21, 2020
use std::convert::TryFrom;
struct GreaterThanZero(i32);
impl TryFrom<i32> for GreaterThanZero {
type Error = &'static str;
fn try_from(value: i32) -> Result<Self, Self::Error> {
if value <= 0 {
Err("GreaterThanZero only accepts value superior than zero!")
} else {
Ok(GreaterThanZero(value))
}
}
}Source: doc.rust-lang.org
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