use std::cmp::Ordering::{self, Equal};
use std::convert::TryInto;
use std::hash::{Hash, Hasher};
+use std::iter;
/// A `LitKind`-like enum to fold constant `Expr`s into.
#[derive(Debug, Clone)]
(&Self::F64(l), &Self::F64(r)) => l.partial_cmp(&r),
(&Self::F32(l), &Self::F32(r)) => l.partial_cmp(&r),
(&Self::Bool(ref l), &Self::Bool(ref r)) => Some(l.cmp(r)),
- (&Self::Tuple(ref l), &Self::Tuple(ref r)) | (&Self::Vec(ref l), &Self::Vec(ref r)) => l
- .iter()
- .zip(r.iter())
+ (&Self::Tuple(ref l), &Self::Tuple(ref r)) | (&Self::Vec(ref l), &Self::Vec(ref r)) => iter::zip(l, r)
.map(|(li, ri)| Self::partial_cmp(tcx, cmp_type, li, ri))
.find(|r| r.map_or(true, |o| o != Ordering::Equal))
.unwrap_or_else(|| Some(l.len().cmp(&r.len()))),