populate_string.rs

pub trait PopulateString {
    fn populate(self, buf: &mut String);
    fn as_str(&self) -> &str;
    fn into_string(self) -> String {
        let mut buf = String::new();
        self.populate(&mut buf);
        buf
    }
}

impl PopulateString for String {
    fn populate(self, buf: &mut String) {
        *buf = self;
    }
    fn as_str(&self) -> &str {
        self
    }
}

impl PopulateString for &str {
    fn populate(self, buf: &mut String) {
        buf.clear();
        buf.push_str(self);
    }
    fn as_str(&self) -> &str {
        self
    }
}

impl PopulateString for alloc::borrow::Cow<'_, str> {
    fn populate(self, buf: &mut String) {
        match self {
            alloc::borrow::Cow::Borrowed(s) => s.populate(buf),
            alloc::borrow::Cow::Owned(s) => s.populate(buf),
        }
    }
    fn as_str(&self) -> &str {
        self
    }
}