Auto merge of #111489 - compiler-errors:rollup-g3vgzss, r=compiler-errors

Rollup of 7 pull requests

Successful merges:

 - #106038 (use implied bounds when checking opaque types)
 - #111366 (Make `NonUseContext::AscribeUserTy` carry `ty::Variance`)
 - #111375 (CFI: Fix SIGILL reached via trait objects)
 - #111439 (Fix backtrace normalization in ice-bug-report-url.rs)
 - #111444 (Only warn single-use lifetime when the binders match.)
 - #111459 (Update browser-ui-test version to 0.16.0)
 - #111460 (Improve suggestion for `self: Box<self>`)

Failed merges:

 - #110454 (Require impl Trait in associated types to appear in method signatures)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2023-05-12 04:45:50 +00:00
commit 699a862a3d
50 changed files with 591 additions and 152 deletions

View file

@ -55,7 +55,7 @@ pub fn categorize(context: PlaceContext) -> Option<DefUse> {
// `PlaceMention` and `AscribeUserType` both evaluate the place, which must not
// contain dangling references.
PlaceContext::NonMutatingUse(NonMutatingUseContext::PlaceMention) |
PlaceContext::NonUse(NonUseContext::AscribeUserTy) |
PlaceContext::NonUse(NonUseContext::AscribeUserTy(_)) |
PlaceContext::MutatingUse(MutatingUseContext::AddressOf) |
PlaceContext::NonMutatingUse(NonMutatingUseContext::AddressOf) |

View file

@ -777,7 +777,7 @@ impl<'a, 'b, 'tcx> TypeVerifier<'a, 'b, 'tcx> {
Inspect | Copy | Move | PlaceMention | SharedBorrow | ShallowBorrow | UniqueBorrow
| AddressOf | Projection,
) => ty::Covariant,
PlaceContext::NonUse(AscribeUserTy) => ty::Covariant,
PlaceContext::NonUse(AscribeUserTy(variance)) => variance,
}
}

View file

@ -94,11 +94,11 @@ pub fn get_fn<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>, instance: Instance<'tcx>) ->
// LLVM will prefix the name with `__imp_`. Ideally, we'd like the
// existing logic below to set the Storage Class, but it has an
// exemption for MinGW for backwards compatability.
let llfn = cx.declare_fn(&common::i686_decorated_name(&dllimport, common::is_mingw_gnu_toolchain(&tcx.sess.target), true), fn_abi);
let llfn = cx.declare_fn(&common::i686_decorated_name(&dllimport, common::is_mingw_gnu_toolchain(&tcx.sess.target), true), fn_abi, Some(instance));
unsafe { llvm::LLVMSetDLLStorageClass(llfn, llvm::DLLStorageClass::DllImport); }
llfn
} else {
cx.declare_fn(sym, fn_abi)
cx.declare_fn(sym, fn_abi, Some(instance))
};
debug!("get_fn: not casting pointer!");

View file

@ -207,6 +207,7 @@ fn declare_unused_fn<'tcx>(cx: &CodegenCx<'_, 'tcx>, def_id: DefId) -> Instance<
)),
ty::List::empty(),
),
None,
);
llvm::set_linkage(llfn, llvm::Linkage::PrivateLinkage);

View file

@ -19,8 +19,11 @@ use crate::llvm::AttributePlace::Function;
use crate::type_::Type;
use crate::value::Value;
use rustc_codegen_ssa::traits::TypeMembershipMethods;
use rustc_middle::ty::Ty;
use rustc_symbol_mangling::typeid::{kcfi_typeid_for_fnabi, typeid_for_fnabi, TypeIdOptions};
use rustc_middle::ty::{Instance, Ty};
use rustc_symbol_mangling::typeid::{
kcfi_typeid_for_fnabi, kcfi_typeid_for_instance, typeid_for_fnabi, typeid_for_instance,
TypeIdOptions,
};
use smallvec::SmallVec;
/// Declare a function.
@ -116,7 +119,12 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
///
/// If theres a value with the same name already declared, the function will
/// update the declaration and return existing Value instead.
pub fn declare_fn(&self, name: &str, fn_abi: &FnAbi<'tcx, Ty<'tcx>>) -> &'ll Value {
pub fn declare_fn(
&self,
name: &str,
fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
instance: Option<Instance<'tcx>>,
) -> &'ll Value {
debug!("declare_rust_fn(name={:?}, fn_abi={:?})", name, fn_abi);
// Function addresses in Rust are never significant, allowing functions to
@ -132,18 +140,35 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
fn_abi.apply_attrs_llfn(self, llfn);
if self.tcx.sess.is_sanitizer_cfi_enabled() {
let typeid = typeid_for_fnabi(self.tcx, fn_abi, TypeIdOptions::empty());
self.set_type_metadata(llfn, typeid);
let typeid = typeid_for_fnabi(self.tcx, fn_abi, TypeIdOptions::GENERALIZE_POINTERS);
self.add_type_metadata(llfn, typeid);
let typeid = typeid_for_fnabi(self.tcx, fn_abi, TypeIdOptions::NORMALIZE_INTEGERS);
self.add_type_metadata(llfn, typeid);
let typeid = typeid_for_fnabi(
self.tcx,
fn_abi,
TypeIdOptions::GENERALIZE_POINTERS | TypeIdOptions::NORMALIZE_INTEGERS,
);
self.add_type_metadata(llfn, typeid);
if let Some(instance) = instance {
let typeid = typeid_for_instance(self.tcx, &instance, TypeIdOptions::empty());
self.set_type_metadata(llfn, typeid);
let typeid =
typeid_for_instance(self.tcx, &instance, TypeIdOptions::GENERALIZE_POINTERS);
self.add_type_metadata(llfn, typeid);
let typeid =
typeid_for_instance(self.tcx, &instance, TypeIdOptions::NORMALIZE_INTEGERS);
self.add_type_metadata(llfn, typeid);
let typeid = typeid_for_instance(
self.tcx,
&instance,
TypeIdOptions::GENERALIZE_POINTERS | TypeIdOptions::NORMALIZE_INTEGERS,
);
self.add_type_metadata(llfn, typeid);
} else {
let typeid = typeid_for_fnabi(self.tcx, fn_abi, TypeIdOptions::empty());
self.set_type_metadata(llfn, typeid);
let typeid = typeid_for_fnabi(self.tcx, fn_abi, TypeIdOptions::GENERALIZE_POINTERS);
self.add_type_metadata(llfn, typeid);
let typeid = typeid_for_fnabi(self.tcx, fn_abi, TypeIdOptions::NORMALIZE_INTEGERS);
self.add_type_metadata(llfn, typeid);
let typeid = typeid_for_fnabi(
self.tcx,
fn_abi,
TypeIdOptions::GENERALIZE_POINTERS | TypeIdOptions::NORMALIZE_INTEGERS,
);
self.add_type_metadata(llfn, typeid);
}
}
if self.tcx.sess.is_sanitizer_kcfi_enabled() {
@ -156,8 +181,13 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
options.insert(TypeIdOptions::NORMALIZE_INTEGERS);
}
let kcfi_typeid = kcfi_typeid_for_fnabi(self.tcx, fn_abi, options);
self.set_kcfi_type_metadata(llfn, kcfi_typeid);
if let Some(instance) = instance {
let kcfi_typeid = kcfi_typeid_for_instance(self.tcx, &instance, options);
self.set_kcfi_type_metadata(llfn, kcfi_typeid);
} else {
let kcfi_typeid = kcfi_typeid_for_fnabi(self.tcx, fn_abi, options);
self.set_kcfi_type_metadata(llfn, kcfi_typeid);
}
}
llfn

View file

@ -772,7 +772,7 @@ fn gen_fn<'ll, 'tcx>(
) -> (&'ll Type, &'ll Value) {
let fn_abi = cx.fn_abi_of_fn_ptr(rust_fn_sig, ty::List::empty());
let llty = fn_abi.llvm_type(cx);
let llfn = cx.declare_fn(name, fn_abi);
let llfn = cx.declare_fn(name, fn_abi, None);
cx.set_frame_pointer_type(llfn);
cx.apply_target_cpu_attr(llfn);
// FIXME(eddyb) find a nicer way to do this.

View file

@ -51,7 +51,7 @@ impl<'tcx> PreDefineMethods<'tcx> for CodegenCx<'_, 'tcx> {
assert!(!instance.substs.has_infer());
let fn_abi = self.fn_abi_of_instance(instance, ty::List::empty());
let lldecl = self.declare_fn(symbol_name, fn_abi);
let lldecl = self.declare_fn(symbol_name, fn_abi, Some(instance));
unsafe { llvm::LLVMRustSetLinkage(lldecl, base::linkage_to_llvm(linkage)) };
let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
base::set_link_section(lldecl, attrs);

View file

@ -31,6 +31,7 @@ use rustc_target::abi::FieldIdx;
use rustc_target::spec::abi::Abi;
use rustc_trait_selection::traits::error_reporting::on_unimplemented::OnUnimplementedDirective;
use rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt as _;
use rustc_trait_selection::traits::outlives_bounds::InferCtxtExt as _;
use rustc_trait_selection::traits::{self, ObligationCtxt, TraitEngine, TraitEngineExt as _};
use std::ops::ControlFlow;
@ -222,7 +223,7 @@ fn check_opaque(tcx: TyCtxt<'_>, id: hir::ItemId) {
if check_opaque_for_cycles(tcx, item.owner_id.def_id, substs, span, &origin).is_err() {
return;
}
check_opaque_meets_bounds(tcx, item.owner_id.def_id, substs, span, &origin);
check_opaque_meets_bounds(tcx, item.owner_id.def_id, span, &origin);
}
/// Checks that an opaque type does not use `Self` or `T::Foo` projections that would result
@ -391,7 +392,6 @@ pub(super) fn check_opaque_for_cycles<'tcx>(
fn check_opaque_meets_bounds<'tcx>(
tcx: TyCtxt<'tcx>,
def_id: LocalDefId,
substs: SubstsRef<'tcx>,
span: Span,
origin: &hir::OpaqueTyOrigin,
) {
@ -406,6 +406,8 @@ fn check_opaque_meets_bounds<'tcx>(
.with_opaque_type_inference(DefiningAnchor::Bind(defining_use_anchor))
.build();
let ocx = ObligationCtxt::new(&infcx);
let substs = InternalSubsts::identity_for_item(tcx, def_id.to_def_id());
let opaque_ty = tcx.mk_opaque(def_id.to_def_id(), substs);
// `ReErased` regions appear in the "parent_substs" of closures/generators.
@ -448,9 +450,18 @@ fn check_opaque_meets_bounds<'tcx>(
match origin {
// Checked when type checking the function containing them.
hir::OpaqueTyOrigin::FnReturn(..) | hir::OpaqueTyOrigin::AsyncFn(..) => {}
// Nested opaque types occur only in associated types:
// ` type Opaque<T> = impl Trait<&'static T, AssocTy = impl Nested>; `
// They can only be referenced as `<Opaque<T> as Trait<&'static T>>::AssocTy`.
// We don't have to check them here because their well-formedness follows from the WF of
// the projection input types in the defining- and use-sites.
hir::OpaqueTyOrigin::TyAlias
if tcx.def_kind(tcx.parent(def_id.to_def_id())) == DefKind::OpaqueTy => {}
// Can have different predicates to their defining use
hir::OpaqueTyOrigin::TyAlias => {
let outlives_env = OutlivesEnvironment::new(param_env);
let wf_tys = ocx.assumed_wf_types(param_env, span, def_id);
let implied_bounds = infcx.implied_bounds_tys(param_env, def_id, wf_tys);
let outlives_env = OutlivesEnvironment::with_bounds(param_env, implied_bounds);
let _ = ocx.resolve_regions_and_report_errors(defining_use_anchor, &outlives_env);
}
}

View file

@ -64,7 +64,7 @@
use crate::mir::*;
use crate::ty::subst::SubstsRef;
use crate::ty::{CanonicalUserTypeAnnotation, Ty};
use crate::ty::{self, CanonicalUserTypeAnnotation, Ty};
use rustc_span::Span;
macro_rules! make_mir_visitor {
@ -782,12 +782,12 @@ macro_rules! make_mir_visitor {
fn super_ascribe_user_ty(&mut self,
place: & $($mutability)? Place<'tcx>,
_variance: $(& $mutability)? ty::Variance,
variance: $(& $mutability)? ty::Variance,
user_ty: & $($mutability)? UserTypeProjection,
location: Location) {
self.visit_place(
place,
PlaceContext::NonUse(NonUseContext::AscribeUserTy),
PlaceContext::NonUse(NonUseContext::AscribeUserTy($(* &$mutability *)? variance)),
location
);
self.visit_user_type_projection(user_ty);
@ -1320,7 +1320,7 @@ pub enum NonUseContext {
/// Ending a storage live range.
StorageDead,
/// User type annotation assertions for NLL.
AscribeUserTy,
AscribeUserTy(ty::Variance),
/// The data of a user variable, for debug info.
VarDebugInfo,
}

View file

@ -1253,7 +1253,7 @@ pub enum ExplicitSelf<'tcx> {
impl<'tcx> ExplicitSelf<'tcx> {
/// Categorizes an explicit self declaration like `self: SomeType`
/// into either `self`, `&self`, `&mut self`, `Box<self>`, or
/// into either `self`, `&self`, `&mut self`, `Box<Self>`, or
/// `Other`.
/// This is mainly used to require the arbitrary_self_types feature
/// in the case of `Other`, to improve error messages in the common cases,

View file

@ -199,6 +199,10 @@ resolve_invalid_asm_sym =
.label = is a local variable
.help = `sym` operands must refer to either a function or a static
resolve_lowercase_self =
attempt to use a non-constant value in a constant
.suggestion = try using `Self`
resolve_trait_impl_duplicate =
duplicate definitions with name `{$name}`:
.label = duplicate definition

View file

@ -948,6 +948,9 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
ResolutionError::InvalidAsmSym => {
self.tcx.sess.create_err(errs::InvalidAsmSym { span })
}
ResolutionError::LowercaseSelf => {
self.tcx.sess.create_err(errs::LowercaseSelf { span })
}
}
}

View file

@ -442,6 +442,14 @@ pub(crate) struct InvalidAsmSym {
pub(crate) span: Span,
}
#[derive(Diagnostic)]
#[diag(resolve_lowercase_self)]
pub(crate) struct LowercaseSelf {
#[primary_span]
#[suggestion(code = "Self", applicability = "maybe-incorrect", style = "short")]
pub(crate) span: Span,
}
#[derive(Diagnostic)]
#[diag(resolve_trait_impl_duplicate, code = "E0201")]
pub(crate) struct TraitImplDuplicate {

View file

@ -15,8 +15,7 @@ use std::ptr;
use crate::errors::{ParamKindInEnumDiscriminant, ParamKindInNonTrivialAnonConst};
use crate::late::{
ConstantHasGenerics, ConstantItemKind, HasGenericParams, NoConstantGenericsReason, PathSource,
Rib, RibKind,
ConstantHasGenerics, HasGenericParams, NoConstantGenericsReason, PathSource, Rib, RibKind,
};
use crate::macros::{sub_namespace_match, MacroRulesScope};
use crate::{errors, AmbiguityError, AmbiguityErrorMisc, AmbiguityKind, Determinacy, Finalize};
@ -1127,28 +1126,25 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
RibKind::ConstantItem(_, item) => {
// Still doesn't deal with upvars
if let Some(span) = finalize {
let (span, resolution_error) =
if let Some((ident, constant_item_kind)) = item {
let kind_str = match constant_item_kind {
ConstantItemKind::Const => "const",
ConstantItemKind::Static => "static",
};
(
span,
AttemptToUseNonConstantValueInConstant(
ident, "let", kind_str,
),
)
} else {
(
rib_ident.span,
AttemptToUseNonConstantValueInConstant(
original_rib_ident_def,
"const",
"let",
),
)
};
let (span, resolution_error) = match item {
None if rib_ident.as_str() == "self" => (span, LowercaseSelf),
None => (
rib_ident.span,
AttemptToUseNonConstantValueInConstant(
original_rib_ident_def,
"const",
"let",
),
),
Some((ident, kind)) => (
span,
AttemptToUseNonConstantValueInConstant(
ident,
"let",
kind.as_str(),
),
),
};
self.report_error(span, resolution_error);
}
return Res::Err;

View file

@ -150,6 +150,15 @@ pub(crate) enum ConstantItemKind {
Static,
}
impl ConstantItemKind {
pub(crate) fn as_str(&self) -> &'static str {
match self {
Self::Const => "const",
Self::Static => "static",
}
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
enum RecordPartialRes {
Yes,
@ -1482,7 +1491,7 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
if let Some(&(_, res)) = rib.bindings.get(&normalized_ident) {
self.record_lifetime_res(lifetime.id, res, LifetimeElisionCandidate::Named);
if let LifetimeRes::Param { param, .. } = res {
if let LifetimeRes::Param { param, binder } = res {
match self.lifetime_uses.entry(param) {
Entry::Vacant(v) => {
debug!("First use of {:?} at {:?}", res, ident.span);
@ -1496,10 +1505,16 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
LifetimeRibKind::Item
| LifetimeRibKind::AnonymousReportError
| LifetimeRibKind::ElisionFailure => Some(LifetimeUseSet::Many),
// An anonymous lifetime is legal here, go ahead.
LifetimeRibKind::AnonymousCreateParameter { .. } => {
Some(LifetimeUseSet::One { use_span: ident.span, use_ctxt })
}
// An anonymous lifetime is legal here, and bound to the right
// place, go ahead.
LifetimeRibKind::AnonymousCreateParameter {
binder: anon_binder,
..
} => Some(if binder == anon_binder {
LifetimeUseSet::One { use_span: ident.span, use_ctxt }
} else {
LifetimeUseSet::Many
}),
// Only report if eliding the lifetime would have the same
// semantics.
LifetimeRibKind::Elided(r) => Some(if res == r {

View file

@ -251,6 +251,8 @@ enum ResolutionError<'a> {
TraitImplDuplicate { name: Symbol, trait_item_span: Span, old_span: Span },
/// Inline asm `sym` operand must refer to a `fn` or `static`.
InvalidAsmSym,
/// `self` used instead of `Self` in a generic parameter
LowercaseSelf,
}
enum VisResolutionError<'a> {

View file

@ -4,7 +4,7 @@
/// For more information about LLVM CFI and cross-language LLVM CFI support for the Rust compiler,
/// see design document in the tracking issue #89653.
use bitflags::bitflags;
use rustc_middle::ty::{FnSig, Ty, TyCtxt};
use rustc_middle::ty::{FnSig, Instance, Ty, TyCtxt};
use rustc_target::abi::call::FnAbi;
use std::hash::Hasher;
use twox_hash::XxHash64;
@ -38,6 +38,15 @@ pub fn typeid_for_fnsig<'tcx>(
typeid_itanium_cxx_abi::typeid_for_fnsig(tcx, fn_sig, options)
}
/// Returns a type metadata identifier for the specified Instance.
pub fn typeid_for_instance<'tcx>(
tcx: TyCtxt<'tcx>,
instance: &Instance<'tcx>,
options: TypeIdOptions,
) -> String {
typeid_itanium_cxx_abi::typeid_for_instance(tcx, instance, options)
}
/// Returns a KCFI type metadata identifier for the specified FnAbi.
pub fn kcfi_typeid_for_fnabi<'tcx>(
tcx: TyCtxt<'tcx>,
@ -63,3 +72,16 @@ pub fn kcfi_typeid_for_fnsig<'tcx>(
hash.write(typeid_itanium_cxx_abi::typeid_for_fnsig(tcx, fn_sig, options).as_bytes());
hash.finish() as u32
}
/// Returns a KCFI type metadata identifier for the specified Instance.
pub fn kcfi_typeid_for_instance<'tcx>(
tcx: TyCtxt<'tcx>,
instance: &Instance<'tcx>,
options: TypeIdOptions,
) -> u32 {
// A KCFI type metadata identifier is a 32-bit constant produced by taking the lower half of the
// xxHash64 of the type metadata identifier. (See llvm/llvm-project@cff5bef.)
let mut hash: XxHash64 = Default::default();
hash.write(typeid_itanium_cxx_abi::typeid_for_instance(tcx, instance, options).as_bytes());
hash.finish() as u32
}

View file

@ -14,8 +14,8 @@ use rustc_errors::DiagnosticMessage;
use rustc_hir as hir;
use rustc_middle::ty::subst::{GenericArg, GenericArgKind, SubstsRef};
use rustc_middle::ty::{
self, Const, ExistentialPredicate, FloatTy, FnSig, IntTy, List, Region, RegionKind, TermKind,
Ty, TyCtxt, UintTy,
self, Const, ExistentialPredicate, FloatTy, FnSig, Instance, IntTy, List, Region, RegionKind,
TermKind, Ty, TyCtxt, UintTy,
};
use rustc_span::def_id::DefId;
use rustc_span::sym;
@ -1010,3 +1010,56 @@ pub fn typeid_for_fnsig<'tcx>(
typeid
}
/// Returns a type metadata identifier for the specified Instance using the Itanium C++ ABI with
/// vendor extended type qualifiers and types for Rust types that are not used at the FFI boundary.
pub fn typeid_for_instance<'tcx>(
tcx: TyCtxt<'tcx>,
instance: &Instance<'tcx>,
options: TypeIdOptions,
) -> String {
let fn_abi = tcx
.fn_abi_of_instance(tcx.param_env(instance.def_id()).and((*instance, ty::List::empty())))
.unwrap_or_else(|instance| {
bug!("typeid_for_instance: couldn't get fn_abi of instance {:?}", instance)
});
// If this instance is a method and self is a reference, get the impl it belongs to
let impl_def_id = tcx.impl_of_method(instance.def_id());
if impl_def_id.is_some() && !fn_abi.args.is_empty() && fn_abi.args[0].layout.ty.is_ref() {
// If this impl is not an inherent impl, get the trait it implements
if let Some(trait_ref) = tcx.impl_trait_ref(impl_def_id.unwrap()) {
// Transform the concrete self into a reference to a trait object
let existential_predicate = trait_ref.map_bound(|trait_ref| {
ty::ExistentialPredicate::Trait(ty::ExistentialTraitRef::erase_self_ty(
tcx, trait_ref,
))
});
let existential_predicates = tcx.mk_poly_existential_predicates(&[ty::Binder::dummy(
existential_predicate.skip_binder(),
)]);
// Is the concrete self mutable?
let self_ty = if fn_abi.args[0].layout.ty.is_mutable_ptr() {
tcx.mk_mut_ref(
tcx.lifetimes.re_erased,
tcx.mk_dynamic(existential_predicates, tcx.lifetimes.re_erased, ty::Dyn),
)
} else {
tcx.mk_imm_ref(
tcx.lifetimes.re_erased,
tcx.mk_dynamic(existential_predicates, tcx.lifetimes.re_erased, ty::Dyn),
)
};
// Replace the concrete self in an fn_abi clone by the reference to a trait object
let mut fn_abi = fn_abi.clone();
// HACK(rcvalle): It is okay to not replace or update the entire ArgAbi here because the
// other fields are never used.
fn_abi.args[0].layout.ty = self_ty;
return typeid_for_fnabi(tcx, &fn_abi, options);
}
}
typeid_for_fnabi(tcx, &fn_abi, options)
}

View file

@ -28,7 +28,7 @@ mod x86;
mod x86_64;
mod x86_win64;
#[derive(PartialEq, Eq, Hash, Debug, HashStable_Generic)]
#[derive(Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
pub enum PassMode {
/// Ignore the argument.
///
@ -211,7 +211,7 @@ impl Uniform {
}
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
#[derive(Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
pub struct CastTarget {
pub prefix: [Option<Reg>; 8],
pub rest: Uniform,
@ -458,7 +458,7 @@ impl<'a, Ty> TyAndLayout<'a, Ty> {
/// Information about how to pass an argument to,
/// or return a value from, a function, under some ABI.
#[derive(PartialEq, Eq, Hash, Debug, HashStable_Generic)]
#[derive(Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
pub struct ArgAbi<'a, Ty> {
pub layout: TyAndLayout<'a, Ty>,
pub mode: PassMode,
@ -605,7 +605,7 @@ pub enum Conv {
///
/// I will do my best to describe this structure, but these
/// comments are reverse-engineered and may be inaccurate. -NDM
#[derive(PartialEq, Eq, Hash, Debug, HashStable_Generic)]
#[derive(Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
pub struct FnAbi<'a, Ty> {
/// The LLVM types of each argument.
pub args: Box<[ArgAbi<'a, Ty>]>,

View file

@ -31,6 +31,18 @@ fn assumed_wf_types(tcx: TyCtxt<'_>, def_id: DefId) -> &ty::List<Ty<'_>> {
}
}
DefKind::AssocConst | DefKind::AssocTy => tcx.assumed_wf_types(tcx.parent(def_id)),
DefKind::OpaqueTy => match tcx.def_kind(tcx.parent(def_id)) {
DefKind::TyAlias => ty::List::empty(),
DefKind::AssocTy => tcx.assumed_wf_types(tcx.parent(def_id)),
// Nested opaque types only occur in associated types:
// ` type Opaque<T> = impl Trait<&'static T, AssocTy = impl Nested>; `
// assumed_wf_types should include those of `Opaque<T>`, `Opaque<T>` itself
// and `&'static T`.
DefKind::OpaqueTy => bug!("unimplemented implied bounds for neseted opaque types"),
def_kind @ _ => {
bug!("unimplemented implied bounds for opaque types with parent {def_kind:?}")
}
},
DefKind::Mod
| DefKind::Struct
| DefKind::Union
@ -51,7 +63,6 @@ fn assumed_wf_types(tcx: TyCtxt<'_>, def_id: DefId) -> &ty::List<Ty<'_>> {
| DefKind::ForeignMod
| DefKind::AnonConst
| DefKind::InlineConst
| DefKind::OpaqueTy
| DefKind::ImplTraitPlaceholder
| DefKind::Field
| DefKind::LifetimeParam

View file

@ -643,7 +643,7 @@ impl UnifyKey for FloatVid {
}
}
#[derive(Copy, Clone, PartialEq, Decodable, Encodable, Hash, HashStable_Generic)]
#[derive(Copy, Clone, PartialEq, Eq, Decodable, Encodable, Hash, HashStable_Generic)]
#[rustc_pass_by_value]
pub enum Variance {
Covariant, // T<A> <: T<B> iff A <: B -- e.g., function return type

View file

@ -143,7 +143,7 @@ async function runTests(opts, framework_options, files, results, status_bar, sho
const tests_queue = [];
for (const testPath of files) {
const callback = runTest(testPath, framework_options)
const callback = runTest(testPath, {"options": framework_options})
.then(out => {
const [output, nb_failures] = out;
results[nb_failures === 0 ? "successful" : "failed"].push({
@ -323,6 +323,7 @@ async function main(argv) {
if (results.failed.length > 0 || results.errored.length > 0) {
process.exit(1);
}
process.exit(0);
}
main(process.argv);

View file

@ -0,0 +1,44 @@
// Verifies that type metadata identifiers for trait objects are emitted correctly.
//
// needs-sanitizer-cfi
// compile-flags: -Clto -Cno-prepopulate-passes -Ctarget-feature=-crt-static -Zsanitizer=cfi
#![crate_type="lib"]
trait Trait1 {
fn foo(&self);
}
struct Type1;
impl Trait1 for Type1 {
fn foo(&self) {
}
}
pub fn foo() {
let a = Type1;
a.foo();
// CHECK-LABEL: define{{.*}}foo{{.*}}!type !{{[0-9]+}}
// CHECK: call <sanitizer_cfi_emit_type_metadata_trait_objects::Type1 as sanitizer_cfi_emit_type_metadata_trait_objects::Trait1>::foo
}
pub fn bar() {
let a = Type1;
let b = &a as &dyn Trait1;
b.foo();
// CHECK-LABEL: define{{.*}}bar{{.*}}!type !{{[0-9]+}}
// CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0|%1}}, metadata !"[[TYPE1:[[:print:]]+]]")
}
pub fn baz() {
let a = Type1;
let b = &a as &dyn Trait1;
a.foo();
b.foo();
// CHECK-LABEL: define{{.*}}baz{{.*}}!type !{{[0-9]+}}
// CHECK: call <sanitizer_cfi_emit_type_metadata_trait_objects::Type1 as sanitizer_cfi_emit_type_metadata_trait_objects::Trait1>::foo
// CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0|%1}}, metadata !"[[TYPE1:[[:print:]]+]]")
}
// CHECK: !{{[0-9]+}} = !{i64 0, !"[[TYPE1]]"}

View file

@ -0,0 +1,69 @@
// Verifies that type metadata identifiers for trait objects are emitted correctly.
//
// revisions: aarch64 x86_64
// [aarch64] compile-flags: --target aarch64-unknown-none
// [aarch64] needs-llvm-components: aarch64
// [x86_64] compile-flags: --target x86_64-unknown-none
// [x86_64] needs-llvm-components:
// compile-flags: -Cno-prepopulate-passes -Zsanitizer=kcfi -Copt-level=0
#![crate_type="lib"]
#![feature(arbitrary_self_types, no_core, lang_items)]
#![no_core]
#[lang="sized"]
trait Sized { }
#[lang="copy"]
trait Copy { }
#[lang="receiver"]
trait Receiver { }
#[lang="dispatch_from_dyn"]
trait DispatchFromDyn<T> { }
impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<&'a U> for &'a T {}
#[lang = "unsize"]
trait Unsize<T: ?Sized> { }
#[lang = "coerce_unsized"]
pub trait CoerceUnsized<T: ?Sized> { }
impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b T {}
#[lang="freeze"]
trait Freeze { }
#[lang="drop_in_place"]
fn drop_in_place_fn<T>() { }
trait Trait1 {
fn foo(&self);
}
struct Type1;
impl Trait1 for Type1 {
fn foo(&self) {
}
}
pub fn foo() {
let a = Type1;
a.foo();
// CHECK-LABEL: define{{.*}}foo{{.*}}!{{<unknown kind #36>|kcfi_type}} !{{[0-9]+}}
// CHECK: call <sanitizer_kcfi_emit_type_metadata_trait_objects::Type1 as sanitizer_kcfi_emit_type_metadata_trait_objects::Trait1>::foo
}
pub fn bar() {
let a = Type1;
let b = &a as &dyn Trait1;
b.foo();
// CHECK-LABEL: define{{.*}}bar{{.*}}!{{<unknown kind #36>|kcfi_type}} !{{[0-9]+}}
// CHECK: call void %0({{\{\}\*|ptr}} align 1 {{%b\.0|%_1}}){{.*}}[ "kcfi"(i32 [[TYPE1:[[:print:]]+]]) ]
}
pub fn baz() {
let a = Type1;
let b = &a as &dyn Trait1;
a.foo();
b.foo();
// CHECK-LABEL: define{{.*}}baz{{.*}}!{{<unknown kind #36>|kcfi_type}} !{{[0-9]+}}
// CHECK: call <sanitizer_kcfi_emit_type_metadata_trait_objects::Type1 as sanitizer_kcfi_emit_type_metadata_trait_objects::Trait1>::foo
// CHECK: call void %0({{\{\}\*|ptr}} align 1 {{%b\.0|%_1}}){{.*}}[ "kcfi"(i32 [[TYPE1:[[:print:]]+]]) ]
}
// CHECK: !{{[0-9]+}} = !{i32 [[TYPE1]]}

View file

@ -7,20 +7,26 @@ set-window-size: (786, 600)
// Confirms that there 3 paragraphs.
assert-count: (".top-doc .docblock p", 3)
// Checking that there is no scrollable content.
store-property: (clientHeight, ".top-doc .docblock p:nth-of-type(1)", "clientHeight")
store-property: (clientWidth, ".top-doc .docblock p:nth-of-type(1)", "clientWidth")
store-property: (".top-doc .docblock p:nth-of-type(1)", {
"clientHeight": clientHeight,
"clientWidth": clientWidth,
})
assert-property: (
".top-doc .docblock p:nth-of-type(1)",
{"scrollHeight": |clientHeight|, "scrollWidth": |clientWidth|},
)
store-property: (clientHeight, ".top-doc .docblock p:nth-of-type(2)", "clientHeight")
store-property: (clientWidth, ".top-doc .docblock p:nth-of-type(2)", "clientWidth")
store-property: (".top-doc .docblock p:nth-of-type(2)", {
"clientHeight": clientHeight,
"clientWidth": clientWidth,
})
assert-property: (
".top-doc .docblock p:nth-of-type(2)",
{"scrollHeight": |clientHeight|, "scrollWidth": |clientWidth|},
)
store-property: (clientHeight, ".top-doc .docblock p:nth-of-type(3)", "clientHeight")
store-property: (clientWidth, ".top-doc .docblock p:nth-of-type(3)", "clientWidth")
store-property: (".top-doc .docblock p:nth-of-type(3)", {
"clientHeight": clientHeight,
"clientWidth": clientWidth,
})
assert-property: (
".top-doc .docblock p:nth-of-type(3)",
{"scrollHeight": |clientHeight|, "scrollWidth": |clientWidth|},

View file

@ -1,5 +1,5 @@
// Test that code blocks nested within <sub> do not have a line height of 0.
go-to: "file://" + |DOC_PATH| + "/test_docs/codeblock_sub/index.html"
store-property: (codeblock_sub_1, "#codeblock-sub-1", "offsetHeight")
store-property: ("#codeblock-sub-1", {"offsetHeight": codeblock_sub_1})
assert-property-false: ("#codeblock-sub-3", { "offsetHeight": |codeblock_sub_1| })

View file

@ -9,7 +9,7 @@ reload:
assert-text: (".top-doc .docblock > h3", "Hello")
assert-css: (
".top-doc .docblock > h3",
{"border-bottom": "1px solid rgb(210, 210, 210)"},
{"border-bottom": "1px solid #d2d2d2"},
)
// We now check that the `<summary>` doesn't have a bottom border and has the correct display.
assert-css: (

View file

@ -4,8 +4,8 @@ go-to: "file://" + |DOC_PATH| + "/lib2/struct.Foo.html"
// We set a fixed size so there is no chance of "random" resize.
set-window-size: (1100, 800)
// We check that ".item-info" is bigger than its content.
assert-css: (".item-info", {"width": "840px"})
assert-css: (".item-info .stab", {"width": "289px"})
assert-size: (".item-info", {"width": 840})
assert-size: (".item-info .stab", {"width": 289})
assert-position: (".item-info .stab", {"x": 245})
// Now we ensure that they're not rendered on the same line.

View file

@ -225,12 +225,12 @@ assert: "#method\.create_an_iterator_from_read .tooltip:focus"
// Now we check that the focus isn't given back to the wrong item when opening
// another popover.
store-window-property: (scroll, "scrollY")
store-window-property: {"scrollY": scroll}
click: "#method\.create_an_iterator_from_read .fn"
// We ensure that the scroll position changed.
assert-window-property-false: {"scrollY": |scroll|}
// Store the new position.
store-window-property: (scroll, "scrollY")
store-window-property: {"scrollY": scroll}
click: "//*[@id='method.create_an_iterator_from_read']//*[@class='tooltip']"
wait-for: "//*[@class='tooltip popover']"
click: "#settings-menu a"
@ -239,12 +239,12 @@ click: ".search-input"
assert-window-property-false: {"scrollY": |scroll|}
// Same but with Escape handling.
store-window-property: (scroll, "scrollY")
store-window-property: {"scrollY": scroll}
click: "#method\.create_an_iterator_from_read .fn"
// We ensure that the scroll position changed.
assert-window-property-false: {"scrollY": |scroll|}
// Store the new position.
store-window-property: (scroll, "scrollY")
store-window-property: {"scrollY": scroll}
click: "//*[@id='method.create_an_iterator_from_read']//*[@class='tooltip']"
wait-for: "//*[@class='tooltip popover']"
click: "#settings-menu a"

View file

@ -3,7 +3,7 @@
go-to: "file://" + |DOC_PATH| + "/scrape_examples/fn.test.html"
// The next/prev buttons vertically scroll the code viewport between examples
store-property: (initialScrollTop, ".scraped-example-list > .scraped-example pre", "scrollTop")
store-property: (".scraped-example-list > .scraped-example pre", {"scrollTop": initialScrollTop})
focus: ".scraped-example-list > .scraped-example .next"
press-key: "Enter"
assert-property-false: (".scraped-example-list > .scraped-example pre", {
@ -16,7 +16,7 @@ assert-property: (".scraped-example-list > .scraped-example pre", {
}, NEAR)
// The expand button increases the scrollHeight of the minimized code viewport
store-property: (smallOffsetHeight, ".scraped-example-list > .scraped-example pre", "offsetHeight")
store-property: (".scraped-example-list > .scraped-example pre", {"offsetHeight": smallOffsetHeight})
assert-property-false: (".scraped-example-list > .scraped-example pre", {
"scrollHeight": |smallOffsetHeight|
}, NEAR)
@ -25,7 +25,7 @@ press-key: "Enter"
assert-property-false: (".scraped-example-list > .scraped-example pre", {
"offsetHeight": |smallOffsetHeight|
}, NEAR)
store-property: (fullOffsetHeight, ".scraped-example-list > .scraped-example pre", "offsetHeight")
store-property: (".scraped-example-list > .scraped-example pre", {"offsetHeight": fullOffsetHeight})
assert-property: (".scraped-example-list > .scraped-example pre", {
"scrollHeight": |fullOffsetHeight|
}, NEAR)

View file

@ -9,9 +9,8 @@ assert-property-false: (
// Check that examples with very long lines have the same width as ones that don't.
store-property: (
clientWidth,
".more-scraped-examples .scraped-example:nth-child(2) .code-wrapper .src-line-numbers",
"clientWidth"
{"clientWidth": clientWidth},
)
assert-property: (
@ -40,8 +39,8 @@ assert-property: (
store-value: (offset_y, 4)
// First with desktop
assert-position: (".scraped-example .code-wrapper", {"y": 253})
assert-position: (".scraped-example .code-wrapper .prev", {"y": 253 + |offset_y|})
assert-position: (".scraped-example .code-wrapper", {"y": 226})
assert-position: (".scraped-example .code-wrapper .prev", {"y": 226 + |offset_y|})
// Then with mobile
set-window-size: (600, 600)

View file

@ -32,8 +32,8 @@ set-text: (
)
// Then we compare again to confirm the height didn't change.
assert-css: ("#crate-search", {"width": "527px"})
assert-css: (".search-results-title", {"height": "50px", "width": "640px"})
assert-size: ("#crate-search", {"width": 527})
assert-size: (".search-results-title", {"height": 50, "width": 640})
// And we check that the `<select>` isn't bigger than its container (".search-results-title").
assert-css: ("#search", {"width": "640px"})

View file

@ -10,7 +10,7 @@ wait-for: "#settings"
assert-css: ("#settings", {"display": "block"})
// Store the line margin to compare with the settings.html later.
store-css: (setting_line_margin, ".setting-line", "margin")
store-css: (".setting-line", {"margin": setting_line_margin})
// Let's close it by clicking on the same button.
click: "#settings-menu"

View file

@ -121,28 +121,28 @@ define-function: (
call-function: ("check-colors", {
"theme": "light",
"color": "rgb(0, 0, 0)",
"color_hover": "rgb(0, 0, 0)",
"background": "rgb(255, 255, 255)",
"background_hover": "rgb(224, 224, 224)",
"color": "black",
"color_hover": "#000",
"background": "#fff",
"background_hover": "#e0e0e0",
"background_toggle": "rgba(0, 0, 0, 0)",
"background_toggle_hover": "rgb(224, 224, 224)",
"background_toggle_hover": "#e0e0e0",
})
call-function: ("check-colors", {
"theme": "dark",
"color": "rgb(221, 221, 221)",
"color_hover": "rgb(221, 221, 221)",
"background": "rgb(51, 51, 51)",
"background_hover": "rgb(68, 68, 68)",
"color": "#ddd",
"color_hover": "#ddd",
"background": "#333",
"background_hover": "#444",
"background_toggle": "rgba(0, 0, 0, 0)",
"background_toggle_hover": "rgb(103, 103, 103)",
"background_toggle_hover": "#676767",
})
call-function: ("check-colors", {
"theme": "ayu",
"color": "rgb(197, 197, 197)",
"color_hover": "rgb(255, 180, 76)",
"color": "#c5c5c5",
"color_hover": "#ffb44c",
"background": "rgb(20, 25, 31)",
"background_hover": "rgb(20, 25, 31)",
"background_hover": "#14191f",
"background_toggle": "rgba(0, 0, 0, 0)",
"background_toggle_hover": "rgba(70, 70, 70, 0.33)",
})

View file

@ -152,14 +152,16 @@ assert-property: (".sidebar", {"clientWidth": "200"})
// Checks that all.html and index.html have their sidebar link in the same place.
go-to: "file://" + |DOC_PATH| + "/test_docs/index.html"
store-property: (index_sidebar_width, ".sidebar .location a", "clientWidth")
store-property: (index_sidebar_height, ".sidebar .location a", "clientHeight")
store-property: (index_sidebar_x, ".sidebar .location a", "offsetTop")
store-property: (index_sidebar_y, ".sidebar .location a", "offsetLeft")
store-property: (".sidebar .location a", {
"clientWidth": index_sidebar_width,
"clientHeight": index_sidebar_height,
"offsetTop": index_sidebar_y,
"offsetLeft": index_sidebar_x,
})
go-to: "file://" + |DOC_PATH| + "/test_docs/all.html"
assert-property: (".sidebar .location a", {
"clientWidth": |index_sidebar_width|,
"clientHeight": |index_sidebar_height|,
"offsetTop": |index_sidebar_x|,
"offsetLeft": |index_sidebar_y|,
"offsetTop": |index_sidebar_y|,
"offsetLeft": |index_sidebar_x|,
})

View file

@ -117,9 +117,8 @@ assert-property: ("#source-sidebar details:first-of-type", {"open": "true"})
// Check the sidebar directory entries have a marker and spacing (desktop).
store-property: (
link_height,
"#source-sidebar > details:first-of-type.dir-entry[open] > .files > a",
"offsetHeight"
{"offsetHeight": link_height},
)
define-function: (
"check-sidebar-dir-entry",
@ -147,16 +146,10 @@ define-function: (
)
}
)
store-property: (
source_sidebar_title_height,
"#source-sidebar > .title",
"offsetHeight"
)
store-property: (
source_sidebar_title_y,
"#source-sidebar > .title",
"offsetTop"
)
store-property: ("#source-sidebar > .title", {
"offsetHeight": source_sidebar_title_height,
"offsetTop": source_sidebar_title_y,
})
call-function: ("check-sidebar-dir-entry", {
"x": 0,
// border + margin = 6
@ -182,16 +175,10 @@ assert-property: ("#main-content", {"offsetTop": 76})
// 21 = 76 - 34 - 21
// Check the sidebar directory entries have a marker and spacing (tablet).
store-property: (
source_sidebar_title_height,
"#source-sidebar > .title",
"offsetHeight"
)
store-property: (
source_sidebar_title_y,
"#source-sidebar > .title",
"offsetTop"
)
store-property: ("#source-sidebar > .title", {
"offsetHeight": source_sidebar_title_height,
"offsetTop": source_sidebar_title_y,
})
call-function: ("check-sidebar-dir-entry", {
"x": 0,
"y": |source_sidebar_title_y| + |source_sidebar_title_height| + 6,
@ -202,16 +189,10 @@ set-window-size: (450, 700)
assert-css: ("nav.sub", {"flex-direction": "column"})
// Check the sidebar directory entries have a marker and spacing (phone).
store-property: (
source_sidebar_title_height,
"#source-sidebar > .title",
"offsetHeight"
)
store-property: (
source_sidebar_title_y,
"#source-sidebar > .title",
"offsetTop"
)
store-property: ("#source-sidebar > .title", {
"offsetHeight": source_sidebar_title_height,
"offsetTop": source_sidebar_title_y,
})
call-function: ("check-sidebar-dir-entry", {
"x": 0,
"y": |source_sidebar_title_y| + |source_sidebar_title_height| + 6,
@ -219,5 +200,5 @@ call-function: ("check-sidebar-dir-entry", {
// Now we check that the logo has a bottom margin so it's not stuck to the search input.
assert-css: (".sub-logo-container > img", {"margin-bottom": "8px"})
store-property: (logo_height, ".sub-logo-container", "clientHeight")
store-property: (".sub-logo-container", {"clientHeight": logo_height})
assert-position: (".search-form", {"y": |logo_height| + 8})

View file

@ -11,6 +11,6 @@ assert-css: (".impl-items .srclink", {"font-size": "16px", "font-weight": 400},
assert-css: (".impl-items .code-header", {"font-size": "16px", "font-weight": 600}, ALL)
// Check that we can click on source link
store-document-property: (url, "URL")
store-document-property: {"URL": url}
click: ".impl-items .srclink"
assert-document-property-false: {"URL": |url|}

View file

@ -1,5 +1,5 @@
// This test ensures that each field is on its own line (In other words, they have display: block).
go-to: "file://" + |DOC_PATH| + "/test_docs/struct.StructWithPublicUndocumentedFields.html"
store-property: (first_top, "//*[@id='structfield.first']", "offsetTop")
store-property: ("//*[@id='structfield.first']", {"offsetTop": first_top})
assert-property-false: ("//*[@id='structfield.second']", { "offsetTop": |first_top| })

View file

@ -39,7 +39,7 @@ assert-property: ("pre.item-decl", {"scrollWidth": "950"})
set-window-size: (600, 600)
go-to: "file://" + |DOC_PATH| + "/lib2/too_long/struct.SuperIncrediblyLongLongLongLongLongLongLongGigaGigaGigaMegaLongLongLongStructName.html"
// It shouldn't have an overflow in the topbar either.
store-property: (scrollWidth, ".mobile-topbar h2", "scrollWidth")
store-property: (".mobile-topbar h2", {"scrollWidth": scrollWidth})
assert-property: (".mobile-topbar h2", {"clientWidth": |scrollWidth|})
assert-css: (".mobile-topbar h2", {"overflow-x": "hidden"})

View file

@ -6,8 +6,8 @@
// normalize-stderr-test "note: compiler flags.*\n\n" -> ""
// normalize-stderr-test "note: rustc.*running on.*" -> "note: rustc {version} running on {platform}"
// normalize-stderr-test "thread.*panicked at .*, compiler.*" -> "thread panicked at 'aborting due to `-Z treat-err-as-bug`'"
// normalize-stderr-test "\s*\d{1,}: .*\n" -> ""
// normalize-stderr-test "\s at .*\n" -> ""
// normalize-stderr-test " +\d{1,}: .*\n" -> ""
// normalize-stderr-test " + at .*\n" -> ""
// normalize-stderr-test ".*note: Some details are omitted.*\n" -> ""
fn wrong()

View file

@ -6,6 +6,7 @@ LL | fn wrong()
thread panicked at 'aborting due to `-Z treat-err-as-bug`'
stack backtrace:
error: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-rustdoc&template=ice.md

View file

@ -2,6 +2,7 @@
#![feature(inherent_associated_types)]
#![allow(incomplete_features)]
#![deny(single_use_lifetimes)]
struct Foo<T>(T);

View file

@ -0,0 +1,8 @@
struct Foo;
impl Foo {
fn do_nothing(self: Box<self>) {} //~ ERROR attempt to use a non-constant value in a constant
//~^ HELP try using `Self`
}
fn main() {}

View file

@ -0,0 +1,8 @@
error: attempt to use a non-constant value in a constant
--> $DIR/explicit-self-lowercase-param.rs:4:29
|
LL | fn do_nothing(self: Box<self>) {}
| ^^^^ help: try using `Self`
error: aborting due to previous error

View file

@ -0,0 +1,25 @@
error[E0309]: the parameter type `T` may not live long enough
--> $DIR/wf-in-associated-type.rs:36:23
|
LL | type Opaque = impl Sized + 'a;
| ^^^^^^^^^^^^^^^ ...so that the type `&'a T` will meet its required lifetime bounds
|
help: consider adding an explicit lifetime bound...
|
LL | impl<'a, T: 'a> Trait<'a, T> for () {
| ++++
error[E0309]: the parameter type `T` may not live long enough
--> $DIR/wf-in-associated-type.rs:36:23
|
LL | type Opaque = impl Sized + 'a;
| ^^^^^^^^^^^^^^^ ...so that the reference type `&'a T` does not outlive the data it points at
|
help: consider adding an explicit lifetime bound...
|
LL | impl<'a, T: 'a> Trait<'a, T> for () {
| ++++
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0309`.

View file

@ -0,0 +1,45 @@
// WF check for impl Trait in associated type position.
//
// revisions: pass fail
// [pass] check-pass
// [fail] check-fail
#![feature(impl_trait_in_assoc_type)]
// The hidden type here (`&'a T`) requires proving `T: 'a`.
// We know it holds because of implied bounds from the impl header.
#[cfg(pass)]
mod pass {
trait Trait<Req> {
type Opaque1;
fn constrain_opaque1(req: Req) -> Self::Opaque1;
}
impl<'a, T> Trait<&'a T> for () {
type Opaque1 = impl IntoIterator<Item = impl Sized + 'a>;
fn constrain_opaque1(req: &'a T) -> Self::Opaque1 {
[req]
}
}
}
// The hidden type here (`&'a T`) requires proving `T: 'a`,
// but that is not known to hold in the impl.
#[cfg(fail)]
mod fail {
trait Trait<'a, T> {
type Opaque;
fn constrain_opaque(req: &'a T) -> Self::Opaque;
}
impl<'a, T> Trait<'a, T> for () {
type Opaque = impl Sized + 'a;
//[fail]~^ ERROR the parameter type `T` may not live long enough
//[fail]~| ERROR the parameter type `T` may not live long enough
fn constrain_opaque(req: &'a T) -> Self::Opaque {
req
}
}
}
fn main() {}

View file

@ -0,0 +1,19 @@
error[E0310]: the parameter type `T` may not live long enough
--> $DIR/wf-nested.rs:55:27
|
LL | type InnerOpaque<T> = impl Sized;
| ^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds...
|
note: ...that is required by this bound
--> $DIR/wf-nested.rs:12:20
|
LL | struct IsStatic<T: 'static>(T);
| ^^^^^^^
help: consider adding an explicit lifetime bound...
|
LL | type InnerOpaque<T: 'static> = impl Sized;
| +++++++++
error: aborting due to previous error
For more information about this error, try `rustc --explain E0310`.

View file

@ -0,0 +1,14 @@
error[E0310]: the parameter type `T` may not live long enough
--> $DIR/wf-nested.rs:46:17
|
LL | let _ = outer.get();
| ^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
|
help: consider adding an explicit lifetime bound...
|
LL | fn test<T: 'static>() {
| +++++++++
error: aborting due to previous error
For more information about this error, try `rustc --explain E0310`.

View file

@ -0,0 +1,60 @@
// Well-formedness of nested opaque types, i.e. `impl Sized` in
// `type Outer = impl Trait<Assoc = impl Sized>`.
// See the comments below.
//
// revisions: pass pass_sound fail
// [pass] check-pass
// [pass_sound] check-fail
// [fail] check-fail
#![feature(type_alias_impl_trait)]
struct IsStatic<T: 'static>(T);
trait Trait<In> {
type Out;
fn get(&self) -> Result<Self::Out, ()> {
Err(())
}
}
impl<T> Trait<&'static T> for () {
type Out = IsStatic<T>;
}
// The hidden type for `impl Sized` is `IsStatic<T>`, which requires `T: 'static`.
// We know it is well-formed because it can *only* be referenced as a projection:
// <OuterOpaque<T> as Trait<&'static T>>::Out`.
// So any instantiation of the type already requires proving `T: 'static`.
#[cfg(pass)]
mod pass {
use super::*;
type OuterOpaque<T> = impl Trait<&'static T, Out = impl Sized>;
fn define<T>() -> OuterOpaque<T> {}
}
// Test the soundness of `pass` - We should require `T: 'static` at the use site.
#[cfg(pass_sound)]
mod pass_sound {
use super::*;
type OuterOpaque<T> = impl Trait<&'static T, Out = impl Sized>;
fn define<T>() -> OuterOpaque<T> {}
fn test<T>() {
let outer = define::<T>();
let _ = outer.get(); //[pass_sound]~ ERROR `T` may not live long enough
}
}
// Similar to `pass` but here `impl Sized` can be referenced directly as
// InnerOpaque<T>, so we require an explicit bound `T: 'static`.
#[cfg(fail)]
mod fail {
use super::*;
type InnerOpaque<T> = impl Sized; //[fail]~ ERROR `T` may not live long enough
type OuterOpaque<T> = impl Trait<&'static T, Out = InnerOpaque<T>>;
fn define<T>() -> OuterOpaque<T> {}
}
fn main() {}