Auto merge of #92268 - jswrenn:transmute, r=oli-obk · rust-lang/rust@e4417cf (original) (raw)
`@@ -48,7 +48,7 @@ pub use subst::*;
`
48
48
`pub use vtable::*;
`
49
49
``
50
50
`use std::fmt::Debug;
`
51
``
`-
use std::hash::Hash;
`
``
51
`+
use std::hash::{Hash, Hasher};
`
52
52
`use std::ops::ControlFlow;
`
53
53
`use std::{fmt, str};
`
54
54
``
`@@ -1704,6 +1704,59 @@ impl VariantDef {
`
1704
1704
`}
`
1705
1705
`}
`
1706
1706
``
``
1707
`+
impl PartialEq for VariantDef {
`
``
1708
`+
#[inline]
`
``
1709
`+
fn eq(&self, other: &Self) -> bool {
`
``
1710
`` +
// There should be only one VariantDef for each def_id, therefore
``
``
1711
`` +
// it is fine to implement PartialEq only based on def_id.
``
``
1712
`+
//
`
``
1713
`` +
// Below, we exhaustively destructure self and other so that if the
``
``
1714
`` +
// definition of VariantDef changes, a compile-error will be produced,
``
``
1715
`+
// reminding us to revisit this assumption.
`
``
1716
+
``
1717
`+
let Self {
`
``
1718
`+
def_id: lhs_def_id,
`
``
1719
`+
ctor_def_id: _,
`
``
1720
`+
name: _,
`
``
1721
`+
discr: _,
`
``
1722
`+
fields: _,
`
``
1723
`+
ctor_kind: _,
`
``
1724
`+
flags: _,
`
``
1725
`+
} = &self;
`
``
1726
+
``
1727
`+
let Self {
`
``
1728
`+
def_id: rhs_def_id,
`
``
1729
`+
ctor_def_id: _,
`
``
1730
`+
name: _,
`
``
1731
`+
discr: _,
`
``
1732
`+
fields: _,
`
``
1733
`+
ctor_kind: _,
`
``
1734
`+
flags: _,
`
``
1735
`+
} = other;
`
``
1736
+
``
1737
`+
lhs_def_id == rhs_def_id
`
``
1738
`+
}
`
``
1739
`+
}
`
``
1740
+
``
1741
`+
impl Eq for VariantDef {}
`
``
1742
+
``
1743
`+
impl Hash for VariantDef {
`
``
1744
`+
#[inline]
`
``
1745
`+
fn hash<H: Hasher>(&self, s: &mut H) {
`
``
1746
`` +
// There should be only one VariantDef for each def_id, therefore
``
``
1747
`` +
// it is fine to implement Hash only based on def_id.
``
``
1748
`+
//
`
``
1749
`` +
// Below, we exhaustively destructure self so that if the definition
``
``
1750
`` +
// of VariantDef changes, a compile-error will be produced, reminding
``
``
1751
`+
// us to revisit this assumption.
`
``
1752
+
``
1753
`+
let Self { def_id, ctor_def_id: _, name: _, discr: _, fields: _, ctor_kind: _, flags: _ } =
`
``
1754
`+
&self;
`
``
1755
+
``
1756
`+
def_id.hash(s)
`
``
1757
`+
}
`
``
1758
`+
}
`
``
1759
+
1707
1760
`#[derive(Copy, Clone, Debug, PartialEq, Eq, TyEncodable, TyDecodable, HashStable)]
`
1708
1761
`pub enum VariantDiscr {
`
1709
1762
`` /// Explicit value for this variant, i.e., X = 123.
``
`@@ -1724,6 +1777,42 @@ pub struct FieldDef {
`
1724
1777
`pub vis: Visibility,
`
1725
1778
`}
`
1726
1779
``
``
1780
`+
impl PartialEq for FieldDef {
`
``
1781
`+
#[inline]
`
``
1782
`+
fn eq(&self, other: &Self) -> bool {
`
``
1783
`` +
// There should be only one FieldDef for each did, therefore it is
``
``
1784
`` +
// fine to implement PartialEq only based on did.
``
``
1785
`+
//
`
``
1786
`` +
// Below, we exhaustively destructure self so that if the definition
``
``
1787
`` +
// of FieldDef changes, a compile-error will be produced, reminding
``
``
1788
`+
// us to revisit this assumption.
`
``
1789
+
``
1790
`+
let Self { did: lhs_did, name: _, vis: _ } = &self;
`
``
1791
+
``
1792
`+
let Self { did: rhs_did, name: _, vis: _ } = other;
`
``
1793
+
``
1794
`+
lhs_did == rhs_did
`
``
1795
`+
}
`
``
1796
`+
}
`
``
1797
+
``
1798
`+
impl Eq for FieldDef {}
`
``
1799
+
``
1800
`+
impl Hash for FieldDef {
`
``
1801
`+
#[inline]
`
``
1802
`+
fn hash<H: Hasher>(&self, s: &mut H) {
`
``
1803
`` +
// There should be only one FieldDef for each did, therefore it is
``
``
1804
`` +
// fine to implement Hash only based on did.
``
``
1805
`+
//
`
``
1806
`` +
// Below, we exhaustively destructure self so that if the definition
``
``
1807
`` +
// of FieldDef changes, a compile-error will be produced, reminding
``
``
1808
`+
// us to revisit this assumption.
`
``
1809
+
``
1810
`+
let Self { did, name: _, vis: _ } = &self;
`
``
1811
+
``
1812
`+
did.hash(s)
`
``
1813
`+
}
`
``
1814
`+
}
`
``
1815
+
1727
1816
`bitflags! {
`
1728
1817
` #[derive(TyEncodable, TyDecodable, Default, HashStable)]
`
1729
1818
`pub struct ReprFlags: u8 {
`