New upstream version 1.63.0+dfsg1

[rustc.git] / compiler / rustc_middle / src / mir / switch_sources.rs

diff --git a/compiler/rustc_middle/src/mir/switch_sources.rs b/compiler/rustc_middle/src/mir/switch_sources.rs
index adeeec70d1c0bb80b6af435db5519818b2d57eae..99d13fcfef43e32e2d326e898b6c5813b08e3d4b 100644 (file)
--- a/compiler/rustc_middle/src/mir/switch_sources.rs
+++ b/compiler/rustc_middle/src/mir/switch_sources.rs
@@ -5,7 +5,7 @@ use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_data_structures::stable_map::FxHashMap;
 use rustc_data_structures::sync::OnceCell;
 use rustc_index::vec::IndexVec;
-use rustc_serialize as serialize;
+use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
 use smallvec::SmallVec;
 
 use crate::mir::{BasicBlock, BasicBlockData, Terminator, TerminatorKind};
@@ -54,14 +54,12 @@ impl SwitchSourceCache {
     }
 }
 
-impl<S: serialize::Encoder> serialize::Encodable<S> for SwitchSourceCache {
+impl<S: Encoder> Encodable<S> for SwitchSourceCache {
     #[inline]
-    fn encode(&self, s: &mut S) -> Result<(), S::Error> {
-        s.emit_unit()
-    }
+    fn encode(&self, _s: &mut S) {}
 }
 
-impl<D: serialize::Decoder> serialize::Decodable<D> for SwitchSourceCache {
+impl<D: Decoder> Decodable<D> for SwitchSourceCache {
     #[inline]
     fn decode(_: &mut D) -> Self {
         Self::new()