use std::fmt;
use crate::db::HirDatabase;
pub struct HirFormatter<'a, 'b> {
pub db: &'a dyn HirDatabase,
fmt: &'a mut fmt::Formatter<'b>,
}
pub trait HirDisplay {
fn hir_fmt(&self, f: &mut HirFormatter) -> fmt::Result;
fn display<'a>(&'a self, db: &'a dyn HirDatabase) -> HirDisplayWrapper<'a, Self>
where
Self: Sized,
{
HirDisplayWrapper(db, self)
}
}
impl<'a, 'b> HirFormatter<'a, 'b> {
pub fn write_joined<T: HirDisplay>(
&mut self,
iter: impl IntoIterator<Item = T>,
sep: &str,
) -> fmt::Result {
let mut first = true;
for e in iter {
if !first {
write!(self, "{}", sep)?;
}
first = false;
e.hir_fmt(self)?;
}
Ok(())
}
pub fn write_fmt(&mut self, args: fmt::Arguments) -> fmt::Result {
fmt::write(self.fmt, args)
}
}
pub struct HirDisplayWrapper<'a, T>(&'a dyn HirDatabase, &'a T);
impl<'a, T> fmt::Display for HirDisplayWrapper<'a, T>
where
T: HirDisplay,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.1.hir_fmt(&mut HirFormatter { db: self.0, fmt: f })
}
}