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use ::std::fmt;
#[macro_export]
macro_rules! lazy_format {(
$fmt:expr $(, $($args:tt)*)?
) => (
$crate::LazyFormat(move |stream|
write!(stream, $fmt $(, $($args)*)? )
)
)}
#[derive(Debug, Clone, Copy)]
pub
struct LazyFormat<Closure> (pub Closure)
where
Closure : Fn(&mut fmt::Formatter<'_>) -> fmt::Result,
;
impl<Closure> fmt::Display for LazyFormat<Closure>
where
Closure : Fn(&mut fmt::Formatter<'_>) -> fmt::Result,
{
#[inline]
fn fmt (
self: &Self,
other: &mut fmt::Formatter<'_>,
) -> fmt::Result
{
self.0(other)
}
}