rustc_middle/ty/
pattern.rsuse std::fmt;
use rustc_data_structures::intern::Interned;
use rustc_macros::{HashStable, TyDecodable, TyEncodable, TypeFoldable, TypeVisitable};
use crate::ty;
#[derive(Copy, Clone, PartialEq, Eq, Hash, HashStable)]
#[rustc_pass_by_value]
pub struct Pattern<'tcx>(pub Interned<'tcx, PatternKind<'tcx>>);
impl<'tcx> std::ops::Deref for Pattern<'tcx> {
type Target = PatternKind<'tcx>;
fn deref(&self) -> &Self::Target {
&*self.0
}
}
impl<'tcx> fmt::Debug for Pattern<'tcx> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:?}", **self)
}
}
impl<'tcx> fmt::Debug for PatternKind<'tcx> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
PatternKind::Range { start, end, include_end } => {
if let Some(start) = start {
write!(f, "{start}")?;
}
write!(f, "..")?;
if include_end {
write!(f, "=")?;
}
if let Some(end) = end {
write!(f, "{end}")?;
}
Ok(())
}
}
}
}
#[derive(Clone, PartialEq, Eq, Hash)]
#[derive(HashStable, TyEncodable, TyDecodable, TypeVisitable, TypeFoldable)]
pub enum PatternKind<'tcx> {
Range { start: Option<ty::Const<'tcx>>, end: Option<ty::Const<'tcx>>, include_end: bool },
}