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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Generics in Trait definition / in Fn definition

Hi folks,

Could you please tell me, if there is a difference between the following?

The only difference I can see is that in the second case I won't need to type AsRef<[u8]> again for another (parse_this2) function?

Thank you.

pub trait MyParser {
    fn parse_this<T>(self, foobar: T) -> String
    where
        T: AsRef<[u8]>;
}
impl MyParser for String {
    fn parse_this<T>(self, foobar: T) -> String
    where
        T: AsRef<[u8]>,
    {
        let s = str::from_utf8(foobar.as_ref()).unwrap_or_default();
        format!("{self}{s}",)
    }
}

pub trait MyParser2<T>
where
    T: AsRef<[u8]>,
{
    fn parse_this(self, foobar: T) -> String;
}
impl<T> MyParser2<T> for String
where
    T: AsRef<[u8]>,
{
    fn parse_this(self, foobar: T) -> String {
        let s = str::from_utf8(foobar.as_ref()).unwrap_or_default();
        format!("{self}{s}",)
    }
}

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