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do not relate Abi and Safety

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and update some macros while we're at it
This commit is contained in:
lcnr 2024-10-22 23:07:51 +02:00
parent 86d69c705a
commit 196fdf144f
8 changed files with 99 additions and 75 deletions
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22
compiler/rustc_middle/src/ty/relate.rs
View File

@ -1,7 +1,5 @@
use std::iter;
use rustc_hir as hir;
use rustc_target::spec::abi;
pub use rustc_type_ir::relate::*;
use crate::ty::error::{ExpectedFound, TypeError};
@ -121,26 +119,6 @@ impl<'tcx> Relate<TyCtxt<'tcx>> for &'tcx ty::List<ty::PolyExistentialPredicate<
}
}
impl<'tcx> Relate<TyCtxt<'tcx>> for hir::Safety {
fn relate<R: TypeRelation<TyCtxt<'tcx>>>(
_relation: &mut R,
a: hir::Safety,
b: hir::Safety,
) -> RelateResult<'tcx, hir::Safety> {
if a != b { Err(TypeError::SafetyMismatch(ExpectedFound::new(true, a, b))) } else { Ok(a) }
}
}
impl<'tcx> Relate<TyCtxt<'tcx>> for abi::Abi {
fn relate<R: TypeRelation<TyCtxt<'tcx>>>(
_relation: &mut R,
a: abi::Abi,
b: abi::Abi,
) -> RelateResult<'tcx, abi::Abi> {
if a == b { Ok(a) } else { Err(TypeError::AbiMismatch(ExpectedFound::new(true, a, b))) }
}
}
impl<'tcx> Relate<TyCtxt<'tcx>> for ty::GenericArgsRef<'tcx> {
fn relate<R: TypeRelation<TyCtxt<'tcx>>>(
relation: &mut R,

7
compiler/rustc_middle/src/ty/structural_impls.rs
View File

@ -264,8 +264,6 @@ TrivialTypeTraversalImpls! {
// interners).
TrivialTypeTraversalAndLiftImpls! {
::rustc_hir::def_id::DefId,
::rustc_hir::Safety,
::rustc_target::spec::abi::Abi,
crate::ty::ClosureKind,
crate::ty::ParamConst,
crate::ty::ParamTy,
@ -276,6 +274,11 @@ TrivialTypeTraversalAndLiftImpls! {
rustc_target::abi::Size,
}
TrivialLiftImpls! {
::rustc_hir::Safety,
::rustc_target::spec::abi::Abi,
}
///////////////////////////////////////////////////////////////////////////
// Lift implementations

4
compiler/rustc_type_ir/src/error.rs
View File

@ -29,8 +29,8 @@ pub enum TypeError<I: Interner> {
Mismatch,
ConstnessMismatch(ExpectedFound<ty::BoundConstness>),
PolarityMismatch(ExpectedFound<ty::PredicatePolarity>),
SafetyMismatch(ExpectedFound<I::Safety>),
AbiMismatch(ExpectedFound<I::Abi>),
SafetyMismatch(#[type_visitable(ignore)] ExpectedFound<I::Safety>),
AbiMismatch(#[type_visitable(ignore)] ExpectedFound<I::Abi>),
Mutability,
ArgumentMutability(usize),
TupleSize(ExpectedFound<usize>),

4
compiler/rustc_type_ir/src/inherent.rs
View File

@ -208,14 +208,14 @@ pub trait Tys<I: Interner<Tys = Self>>:
fn output(self) -> I::Ty;
}
pub trait Abi<I: Interner<Abi = Self>>: Copy + Debug + Hash + Eq + Relate<I> {
pub trait Abi<I: Interner<Abi = Self>>: Copy + Debug + Hash + Eq {
fn rust() -> Self;
/// Whether this ABI is `extern "Rust"`.
fn is_rust(self) -> bool;
}
pub trait Safety<I: Interner<Safety = Self>>: Copy + Debug + Hash + Eq + Relate<I> {
pub trait Safety<I: Interner<Safety = Self>>: Copy + Debug + Hash + Eq {
fn safe() -> Self;
fn is_safe(self) -> bool;

15
compiler/rustc_type_ir/src/relate.rs
View File

@ -174,12 +174,17 @@ impl<I: Interner> Relate<I> for ty::FnSig<I> {
ExpectedFound::new(true, a, b)
}));
}
let safety = relation.relate(a.safety, b.safety)?;
let abi = relation.relate(a.abi, b.abi)?;
if a.safety != b.safety {
return Err(TypeError::SafetyMismatch(ExpectedFound::new(true, a.safety, b.safety)));
}
if a.abi != b.abi {
return Err(TypeError::AbiMismatch(ExpectedFound::new(true, a.abi, b.abi)));
};
let a_inputs = a.inputs();
let b_inputs = b.inputs();
if a_inputs.len() != b_inputs.len() {
return Err(TypeError::ArgCount);
}
@ -212,8 +217,8 @@ impl<I: Interner> Relate<I> for ty::FnSig<I> {
Ok(ty::FnSig {
inputs_and_output: cx.mk_type_list_from_iter(inputs_and_output)?,
c_variadic: a.c_variadic,
safety,
abi,
safety: a.safety,
abi: a.abi,
})
}
}

4
compiler/rustc_type_ir/src/ty_kind.rs
View File

@ -861,7 +861,11 @@ pub struct TypeAndMut<I: Interner> {
pub struct FnSig<I: Interner> {
pub inputs_and_output: I::Tys,
pub c_variadic: bool,
#[type_visitable(ignore)]
#[type_foldable(identity)]
pub safety: I::Safety,
#[type_visitable(ignore)]
#[type_foldable(identity)]
pub abi: I::Abi,
}

4
compiler/rustc_type_ir/src/ty_kind/closure.rs
View File

@ -372,8 +372,12 @@ pub struct CoroutineClosureSignature<I: Interner> {
/// Always false
pub c_variadic: bool,
/// Always `Normal` (safe)
#[type_visitable(ignore)]
#[type_foldable(identity)]
pub safety: I::Safety,
/// Always `RustCall`
#[type_visitable(ignore)]
#[type_foldable(identity)]
pub abi: I::Abi,
}

114
compiler/rustc_type_ir_macros/src/lib.rs
View File

@ -1,18 +1,73 @@
use quote::quote;
use syn::parse_quote;
use quote::{ToTokens, quote};
use syn::visit_mut::VisitMut;
use syn::{Attribute, parse_quote};
use synstructure::decl_derive;
decl_derive!(
[TypeFoldable_Generic] => type_foldable_derive
[TypeVisitable_Generic, attributes(type_visitable)] => type_visitable_derive
);
decl_derive!(
[TypeVisitable_Generic] => type_visitable_derive
[TypeFoldable_Generic, attributes(type_foldable)] => type_foldable_derive
);
decl_derive!(
[Lift_Generic] => lift_derive
);
fn has_ignore_attr(attrs: &[Attribute], name: &'static str, meta: &'static str) -> bool {
let mut ignored = false;
attrs.iter().for_each(|attr| {
if !attr.path().is_ident(name) {
return;
}
let _ = attr.parse_nested_meta(|nested| {
if nested.path.is_ident(meta) {
ignored = true;
}
Ok(())
});
});
ignored
}
fn type_visitable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream {
if let syn::Data::Union(_) = s.ast().data {
panic!("cannot derive on union")
}
if !s.ast().generics.type_params().any(|ty| ty.ident == "I") {
s.add_impl_generic(parse_quote! { I });
}
s.filter(|bi| !has_ignore_attr(&bi.ast().attrs, "type_visitable", "ignore"));
s.add_where_predicate(parse_quote! { I: Interner });
s.add_bounds(synstructure::AddBounds::Fields);
let body_visit = s.each(|bind| {
quote! {
match ::rustc_ast_ir::visit::VisitorResult::branch(
::rustc_type_ir::visit::TypeVisitable::visit_with(#bind, __visitor)
) {
::core::ops::ControlFlow::Continue(()) => {},
::core::ops::ControlFlow::Break(r) => {
return ::rustc_ast_ir::visit::VisitorResult::from_residual(r);
},
}
}
});
s.bind_with(|_| synstructure::BindStyle::Move);
s.bound_impl(quote!(::rustc_type_ir::visit::TypeVisitable<I>), quote! {
fn visit_with<__V: ::rustc_type_ir::visit::TypeVisitor<I>>(
&self,
__visitor: &mut __V
) -> __V::Result {
match *self { #body_visit }
<__V::Result as ::rustc_ast_ir::visit::VisitorResult>::output()
}
})
}
fn type_foldable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream {
if let syn::Data::Union(_) = s.ast().data {
panic!("cannot derive on union")
@ -29,12 +84,23 @@ fn type_foldable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::Toke
let bindings = vi.bindings();
vi.construct(|_, index| {
let bind = &bindings[index];
quote! {
::rustc_type_ir::fold::TypeFoldable::try_fold_with(#bind, __folder)?
// retain value of fields with #[type_foldable(identity)]
if has_ignore_attr(&bind.ast().attrs, "type_foldable", "identity") {
bind.to_token_stream()
} else {
quote! {
::rustc_type_ir::fold::TypeFoldable::try_fold_with(#bind, __folder)?
}
}
})
});
// We filter fields which get ignored and don't require them to implement
// `TypeFoldable`. We do so after generating `body_fold` as we still need
// to generate code for them.
s.filter(|bi| !has_ignore_attr(&bi.ast().attrs, "type_foldable", "identity"));
s.add_bounds(synstructure::AddBounds::Fields);
s.bound_impl(quote!(::rustc_type_ir::fold::TypeFoldable<I>), quote! {
fn try_fold_with<__F: ::rustc_type_ir::fold::FallibleTypeFolder<I>>(
self,
@ -113,39 +179,3 @@ fn lift(mut ty: syn::Type) -> syn::Type {
ty
}
fn type_visitable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream {
if let syn::Data::Union(_) = s.ast().data {
panic!("cannot derive on union")
}
if !s.ast().generics.type_params().any(|ty| ty.ident == "I") {
s.add_impl_generic(parse_quote! { I });
}
s.add_where_predicate(parse_quote! { I: Interner });
s.add_bounds(synstructure::AddBounds::Fields);
let body_visit = s.each(|bind| {
quote! {
match ::rustc_ast_ir::visit::VisitorResult::branch(
::rustc_type_ir::visit::TypeVisitable::visit_with(#bind, __visitor)
) {
::core::ops::ControlFlow::Continue(()) => {},
::core::ops::ControlFlow::Break(r) => {
return ::rustc_ast_ir::visit::VisitorResult::from_residual(r);
},
}
}
});
s.bind_with(|_| synstructure::BindStyle::Move);
s.bound_impl(quote!(::rustc_type_ir::visit::TypeVisitable<I>), quote! {
fn visit_with<__V: ::rustc_type_ir::visit::TypeVisitor<I>>(
&self,
__visitor: &mut __V
) -> __V::Result {
match *self { #body_visit }
<__V::Result as ::rustc_ast_ir::visit::VisitorResult>::output()
}
})
}