no hash for the query result

Author: SparrowLii

compiler/rustc_ast/src/token.rs

@@ -17,7 +17,7 @@ use rustc_span::symbol::{Ident, Symbol};
 use rustc_span::{edition::Edition, ErrorGuaranteed, Span, DUMMY_SP};
 use std::borrow::Cow;
 use std::fmt;
-use std::hash::{Hash, Hasher};
+use std::hash::Hash;
 
 #[derive(Clone, Copy, PartialEq, Encodable, Decodable, Debug, HashStable_Generic, Hash)]
 pub enum CommentKind {
@@ -245,7 +245,7 @@ impl From<IdentIsRaw> for bool {
 
 // SAFETY: due to the `Clone` impl below, all fields of all variants other than
 // `Interpolated` must impl `Copy`.
-#[derive(PartialEq, Encodable, Decodable, Debug, HashStable_Generic, Hash)]
+#[derive(PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
 pub enum TokenKind {
     /* Expression-operator symbols. */
     /// `=`
@@ -371,7 +371,7 @@ impl Clone for TokenKind {
     }
 }
 
-#[derive(Clone, PartialEq, Encodable, Decodable, Debug, HashStable_Generic, Hash)]
+#[derive(Clone, PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
 pub struct Token {
     pub kind: TokenKind,
     pub span: Span,
@@ -1019,12 +1019,6 @@ where
     }
 }
 
-impl Hash for Nonterminal {
-    fn hash<H: Hasher>(&self, _state: &mut H) {
-        panic!("interpolated tokens should not be present in the HIR")
-    }
-}
-
 // Some types are used a lot. Make sure they don't unintentionally get bigger.
 #[cfg(target_pointer_width = "64")]
 mod size_asserts {

compiler/rustc_ast/src/tokenstream.rs

@@ -26,11 +26,11 @@ use rustc_span::{sym, Span, SpanDecoder, SpanEncoder, Symbol, DUMMY_SP};
 use smallvec::{smallvec, SmallVec};
 
 use std::borrow::Cow;
-use std::hash::{Hash, Hasher};
+use std::hash::Hash;
 use std::{cmp, fmt, iter};
 
 /// Part of a `TokenStream`.
-#[derive(Debug, Clone, PartialEq, Encodable, Decodable, HashStable_Generic, Hash)]
+#[derive(Debug, Clone, PartialEq, Encodable, Decodable, HashStable_Generic)]
 pub enum TokenTree {
     /// A single token. Should never be `OpenDelim` or `CloseDelim`, because
     /// delimiters are implicitly represented by `Delimited`.
@@ -108,13 +108,13 @@ where
     }
 }
 
-impl Hash for TokenStream {
+/*impl Hash for TokenStream {
     fn hash<H: Hasher>(&self, state: &mut H) {
         for sub_tt in self.trees() {
             sub_tt.hash(state);
         }
     }
-}
+}*/
 
 pub trait ToAttrTokenStream: sync::DynSend + sync::DynSync {
     fn to_attr_token_stream(&self) -> AttrTokenStream;

compiler/rustc_middle/src/query/mod.rs

@@ -120,6 +120,7 @@ rustc_queries! {
 
     query expand_legacy_bang(key: (LocalExpnId, Span, LocalExpnId)) -> Result<(&'tcx TokenStream, usize), CanRetry> {
         eval_always
+        no_hash
         desc { "expand lagacy bang" }
     }