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Use impl Tag for $T syntax for impl_tag!

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This commit is contained in:
Maybe Waffle 2023-04-20 18:49:40 +00:00
parent 77c83c0965
commit 96905d568a
3 changed files with 12 additions and 12 deletions
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12
compiler/rustc_data_structures/src/tagged_ptr/impl_tag.rs
View File

@ -23,7 +23,7 @@
///
/// impl_tag! {
/// // The type for which the `Tag` will be implemented
/// for SomeTag;
/// impl Tag for SomeTag;
/// // You need to specify the `{value_of_the_type} <=> {tag}` relationship
/// SomeTag::A <=> 0,
/// SomeTag::B <=> 1,
@ -54,7 +54,7 @@
/// struct Flags { a: bool, b: bool }
///
/// impl_tag! {
/// for Flags;
/// impl Tag for Flags;
/// Flags { a: true, b: true } <=> 3,
/// Flags { a: false, b: true } <=> 2,
/// Flags { a: true, b: false } <=> 1,
@ -73,7 +73,7 @@
// struct Unit;
//
// impl_tag! {
// for Unit;
// impl Tag for Unit;
// Unit <=> 0,
// Unit <=> 1,
// }
@ -87,7 +87,7 @@
// enum E { A, B };
//
// impl_tag! {
// for E;
// impl Tag for E;
// E::A <=> 0,
// E::B <=> 0,
// }
@ -104,14 +104,14 @@
/// }
///
/// impl_tag! {
/// for E;
/// impl Tag for E;
/// E::A <=> 0,
/// }
/// ```
#[macro_export]
macro_rules! impl_tag {
(
for $Self:ty;
impl Tag for $Self:ty;
$(
$($path:ident)::* $( { $( $fields:tt )* })? <=> $tag:literal,
)*

10
compiler/rustc_data_structures/src/tagged_ptr/impl_tag/tests.rs
View File

@ -4,22 +4,22 @@ fn bits_constant() {
#[derive(Copy, Clone)]
struct Unit;
impl_tag! { for Unit; Unit <=> 0, }
impl_tag! { impl Tag for Unit; Unit <=> 0, }
assert_eq!(Unit::BITS, 0);
#[derive(Copy, Clone)]
struct Unit1;
impl_tag! { for Unit1; Unit1 <=> 1, }
impl_tag! { impl Tag for Unit1; Unit1 <=> 1, }
assert_eq!(Unit1::BITS, 1);
#[derive(Copy, Clone)]
struct Unit2;
impl_tag! { for Unit2; Unit2 <=> 0b10, }
impl_tag! { impl Tag for Unit2; Unit2 <=> 0b10, }
assert_eq!(Unit2::BITS, 2);
#[derive(Copy, Clone)]
struct Unit3;
impl_tag! { for Unit3; Unit3 <=> 0b100, }
impl_tag! { impl Tag for Unit3; Unit3 <=> 0b100, }
assert_eq!(Unit3::BITS, 3);
#[derive(Copy, Clone)]
@ -28,6 +28,6 @@ fn bits_constant() {
B,
C,
}
impl_tag! { for Enum; Enum::A <=> 0b1, Enum::B <=> 0b1000, Enum::C <=> 0b10, }
impl_tag! { impl Tag for Enum; Enum::A <=> 0b1, Enum::B <=> 0b1000, Enum::C <=> 0b10, }
assert_eq!(Enum::BITS, 4);
}

2
compiler/rustc_middle/src/ty/mod.rs
View File

@ -1627,7 +1627,7 @@ struct ParamTag {
}
impl_tag! {
for ParamTag;
impl Tag for ParamTag;
ParamTag { reveal: traits::Reveal::UserFacing, constness: hir::Constness::NotConst } <=> 0,
ParamTag { reveal: traits::Reveal::All, constness: hir::Constness::NotConst } <=> 1,
ParamTag { reveal: traits::Reveal::UserFacing, constness: hir::Constness::Const } <=> 2,