Deserialize String to MacAddr6 in toml file

help
1

I have a toml file with pairs id and mac like this:

[[component]]
id = 1
mac = "d4:d7:04:c9:85:a4"
[[component]]
id = 3
mac = "3c:21:ee:b4:0d:ab"
[[component]]
id = 6
mac = "ea:f3:23:8c:b8:c1"

The goal is to deserialize this file to a Vec of this struct (MacAddr6 belongs to the macaddr crate:

#[derive(Deserialize, Debug)]
pub struct Component {
    pub id: u16,
    pub mac: MacAddr6,
}

When I try to deserialize, this error is shown:

inner: TomlError { message: "invalid type: string
"d4:d7:04:c9:85:a4", expected an array of length 6"

If I change MacAddr6 to String in the struct definition and everything worked fine, so I have a workaround. Nevertheless, since MacAddr6 implements serde::Deserialize and core::str::FromStr I was expecting to retrieve the full struct in one time. What am I doing wrong?

2

Have you enabled the serde_std feature of macaddr?

3

Yes, I have. I solved this by using serde_with crate:

#[serde_as]
#[derive(Deserialize, Debug, Eq, PartialEq, Clone)]
pub struct Bms {
    pub id: u16,
    #[serde_as(as = "DisplayFromStr")]
    pub mac: MacAddr6,
}