blob: 6cf8122e200dbaec731b9585ee8933a933b4b216 [file] [log] [blame]
use crate::hair::*;
use rustc_hir as hir;
crate trait ToRef {
type Output;
fn to_ref(self) -> Self::Output;
}
impl<'tcx> ToRef for &'tcx hir::Expr<'tcx> {
type Output = ExprRef<'tcx>;
fn to_ref(self) -> ExprRef<'tcx> {
ExprRef::Hair(self)
}
}
impl<'tcx> ToRef for &'tcx &'tcx hir::Expr<'tcx> {
type Output = ExprRef<'tcx>;
fn to_ref(self) -> ExprRef<'tcx> {
ExprRef::Hair(&**self)
}
}
impl<'tcx> ToRef for Expr<'tcx> {
type Output = ExprRef<'tcx>;
fn to_ref(self) -> ExprRef<'tcx> {
ExprRef::Mirror(Box::new(self))
}
}
impl<'tcx, T, U> ToRef for &'tcx Option<T>
where
&'tcx T: ToRef<Output = U>,
{
type Output = Option<U>;
fn to_ref(self) -> Option<U> {
self.as_ref().map(|expr| expr.to_ref())
}
}
impl<'tcx, T, U> ToRef for &'tcx Vec<T>
where
&'tcx T: ToRef<Output = U>,
{
type Output = Vec<U>;
fn to_ref(self) -> Vec<U> {
self.iter().map(|expr| expr.to_ref()).collect()
}
}
impl<'tcx, T, U> ToRef for &'tcx [T]
where
&'tcx T: ToRef<Output = U>,
{
type Output = Vec<U>;
fn to_ref(self) -> Vec<U> {
self.iter().map(|expr| expr.to_ref()).collect()
}
}