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Remove unnecessary trait bounds from keys::Keys.

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This commit is contained in:
Nicholas Nethercote 2019-10-20 10:35:51 +11:00
parent c23a7aa778
commit 77c50dc508
1 changed files with 2 additions and 7 deletions
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9
src/librustc/ty/query/keys.rs
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@ -8,14 +8,12 @@ use crate::ty::subst::SubstsRef;
use crate::ty::fast_reject::SimplifiedType;
use crate::mir;
use std::fmt::Debug;
use std::hash::Hash;
use syntax_pos::{Span, DUMMY_SP};
use syntax_pos::symbol::InternedString;
/// The `Key` trait controls what types can legally be used as the key
/// for a query.
pub(super) trait Key: Clone + Hash + Eq + Debug {
pub(super) trait Key {
/// Given an instance of this key, what crate is it referring to?
/// This is used to find the provider.
fn query_crate(&self) -> CrateNum;
@ -201,10 +199,7 @@ impl Key for InternedString {
/// Canonical query goals correspond to abstract trait operations that
/// are not tied to any crate in particular.
impl<'tcx, T> Key for Canonical<'tcx, T>
where
T: Debug + Hash + Clone + Eq,
{
impl<'tcx, T> Key for Canonical<'tcx, T> {
fn query_crate(&self) -> CrateNum {
LOCAL_CRATE
}