liquid_core/model/value/
display.rs

1use std::fmt;
2
3/// Abstract the lifetime of a `Display`.
4#[allow(missing_debug_implementations)]
5pub enum DisplayCow<'a> {
6    /// A boxed `Display`
7    Owned(Box<dyn fmt::Display + 'a>),
8    /// A borrowed `Display`
9    Borrowed(&'a dyn fmt::Display),
10}
11
12impl DisplayCow<'_> {
13    fn as_ref(&self) -> &dyn fmt::Display {
14        match self {
15            DisplayCow::Owned(o) => o.as_ref(),
16            DisplayCow::Borrowed(b) => b,
17        }
18    }
19}
20
21impl fmt::Display for DisplayCow<'_> {
22    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
23        self.as_ref().fmt(f)
24    }
25}
26
27pub(crate) struct StrDisplay {
28    pub(crate) s: &'static str,
29}
30
31impl fmt::Display for StrDisplay {
32    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
33        write!(f, "{}", self.s)
34    }
35}