1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

use crate::util::errors::CargoResult;
use semver::Version;

pub trait ToSemver {
    fn to_semver(self) -> CargoResult<Version>;
}

impl ToSemver for Version {
    fn to_semver(self) -> CargoResult<Version> {
        Ok(self)
    }
}

impl<'a> ToSemver for &'a str {
    fn to_semver(self) -> CargoResult<Version> {
        match Version::parse(self) {
            Ok(v) => Ok(v),
            Err(..) => Err(failure::format_err!("cannot parse '{}' as a semver", self)),
        }
    }
}

impl<'a> ToSemver for &'a String {
    fn to_semver(self) -> CargoResult<Version> {
        (**self).to_semver()
    }
}

impl<'a> ToSemver for &'a Version {
    fn to_semver(self) -> CargoResult<Version> {
        Ok(self.clone())
    }
}