use rustc_data_structures::fx::FxHashMap;
use rustc_data_structures::stable_hasher::StableHasher;
use rustc_data_structures::sync::{AtomicU32, Lrc, MappedReadGuard, ReadGuard, RwLock};
+use std::cmp;
use std::hash::Hash;
use std::path::{Path, PathBuf};
use std::sync::atomic::Ordering;
-use std::{clone::Clone, cmp};
-use std::{convert::TryFrom, unreachable};
use std::fs;
use std::io;
/// Otherwise, the span reached to limit is returned.
pub fn span_look_ahead(&self, span: Span, expect: Option<&str>, limit: Option<usize>) -> Span {
let mut sp = span;
- for _ in 0..limit.unwrap_or(100 as usize) {
+ for _ in 0..limit.unwrap_or(100_usize) {
sp = self.next_point(sp);
if let Ok(ref snippet) = self.span_to_snippet(sp) {
if expect.map_or(false, |es| snippet == es) {
// NOTE: We are iterating over the mapping entries from last to first
// because entries specified later on the command line should
// take precedence.
- for &(ref from, ref to) in mapping.iter().rev() {
+ for (from, to) in mapping.iter().rev() {
debug!("Trying to apply {from:?} => {to:?}");
if let Ok(rest) = path.strip_prefix(from) {