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Auto merge of #102471 - Dylan-DPC:rollup-ij3okjt, r=Dylan-DPC

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Rollup of 7 pull requests

Successful merges:

 - #102336 (Fix associated type bindings with anon const in GAT position)
 - #102342 (Add negation methods for signed non-zero integers.)
 - #102385 (Don't export `__heap_base` and `__data_end` on wasm32-wasi.)
 - #102435 (Improve example of Iterator::reduce)
 - #102436 (rustdoc: clean up "normalize.css 8" input override CSS)
 - #102452 (fix minor ungrammatical sentence)
 - #102455 (Use let-chaining in `WhileTrue::check_expr`.)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2022-09-29 13:27:28 +00:00
commit 65445a571c
9 changed files with 301 additions and 86 deletions
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10
compiler/rustc_codegen_ssa/src/back/linker.rs
View file

@ -1320,10 +1320,12 @@ impl<'a> Linker for WasmLd<'a> {
// LLD will hide these otherwise-internal symbols since it only exports
// symbols explicitly passed via the `--export` flags above and hides all
// others. Various bits and pieces of tooling use this, so be sure these
// symbols make their way out of the linker as well.
self.cmd.arg("--export=__heap_base");
self.cmd.arg("--export=__data_end");
// others. Various bits and pieces of wasm32-unknown-unknown tooling use
// this, so be sure these symbols make their way out of the linker as well.
if self.sess.target.os == "unknown" {
self.cmd.arg("--export=__heap_base");
self.cmd.arg("--export=__data_end");
}
}
fn subsystem(&mut self, _subsystem: &str) {}

117
compiler/rustc_hir_analysis/src/collect/type_of.rs
View file

@ -333,7 +333,12 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
find_opaque_ty_constraints_for_tait(tcx, def_id)
}
// Opaque types desugared from `impl Trait`.
ItemKind::OpaqueTy(OpaqueTy { origin: hir::OpaqueTyOrigin::FnReturn(owner) | hir::OpaqueTyOrigin::AsyncFn(owner), in_trait, .. }) => {
ItemKind::OpaqueTy(OpaqueTy {
origin:
hir::OpaqueTyOrigin::FnReturn(owner) | hir::OpaqueTyOrigin::AsyncFn(owner),
in_trait,
..
}) => {
if in_trait {
span_bug!(item.span, "impl-trait in trait has no default")
} else {
@ -378,7 +383,9 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
Node::Field(field) => icx.to_ty(field.ty),
Node::Expr(&Expr { kind: ExprKind::Closure{..}, .. }) => tcx.typeck(def_id).node_type(hir_id),
Node::Expr(&Expr { kind: ExprKind::Closure { .. }, .. }) => {
tcx.typeck(def_id).node_type(hir_id)
}
Node::AnonConst(_) if let Some(param) = tcx.opt_const_param_of(def_id) => {
// We defer to `type_of` of the corresponding parameter
@ -410,40 +417,91 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
| Node::Item(&Item { kind: ItemKind::GlobalAsm(asm), .. })
if asm.operands.iter().any(|(op, _op_sp)| match op {
hir::InlineAsmOperand::Const { anon_const }
| hir::InlineAsmOperand::SymFn { anon_const } => anon_const.hir_id == hir_id,
| hir::InlineAsmOperand::SymFn { anon_const } => {
anon_const.hir_id == hir_id
}
_ => false,
}) =>
{
tcx.typeck(def_id).node_type(hir_id)
}
Node::Variant(Variant { disr_expr: Some(ref e), .. }) if e.hir_id == hir_id => tcx
.adt_def(tcx.hir().get_parent_item(hir_id))
.repr()
.discr_type()
.to_ty(tcx),
Node::Variant(Variant { disr_expr: Some(ref e), .. }) if e.hir_id == hir_id => {
tcx.adt_def(tcx.hir().get_parent_item(hir_id)).repr().discr_type().to_ty(tcx)
}
Node::TypeBinding(binding @ &TypeBinding { hir_id: binding_id, .. })
if let Node::TraitRef(trait_ref) = tcx.hir().get(
tcx.hir().get_parent_node(binding_id)
) =>
Node::TypeBinding(
binding @ &TypeBinding {
hir_id: binding_id,
kind: TypeBindingKind::Equality { term: Term::Const(ref e) },
..
},
) if let Node::TraitRef(trait_ref) =
tcx.hir().get(tcx.hir().get_parent_node(binding_id))
&& e.hir_id == hir_id =>
{
let Some(trait_def_id) = trait_ref.trait_def_id() else {
return tcx.ty_error_with_message(DUMMY_SP, "Could not find trait");
};
let assoc_items = tcx.associated_items(trait_def_id);
let assoc_item = assoc_items.find_by_name_and_kind(
tcx, binding.ident, ty::AssocKind::Const, def_id.to_def_id(),
);
if let Some(assoc_item) = assoc_item {
tcx.type_of(assoc_item.def_id)
} else {
// FIXME(associated_const_equality): add a useful error message here.
tcx.ty_error_with_message(
DUMMY_SP,
"Could not find associated const on trait",
)
}
let Some(trait_def_id) = trait_ref.trait_def_id() else {
return tcx.ty_error_with_message(DUMMY_SP, "Could not find trait");
};
let assoc_items = tcx.associated_items(trait_def_id);
let assoc_item = assoc_items.find_by_name_and_kind(
tcx,
binding.ident,
ty::AssocKind::Const,
def_id.to_def_id(),
);
if let Some(assoc_item) = assoc_item {
tcx.type_of(assoc_item.def_id)
} else {
// FIXME(associated_const_equality): add a useful error message here.
tcx.ty_error_with_message(
DUMMY_SP,
"Could not find associated const on trait",
)
}
}
Node::TypeBinding(
binding @ &TypeBinding { hir_id: binding_id, gen_args, ref kind, .. },
) if let Node::TraitRef(trait_ref) =
tcx.hir().get(tcx.hir().get_parent_node(binding_id))
&& let Some((idx, _)) =
gen_args.args.iter().enumerate().find(|(_, arg)| {
if let GenericArg::Const(ct) = arg {
ct.value.hir_id == hir_id
} else {
false
}
}) =>
{
let Some(trait_def_id) = trait_ref.trait_def_id() else {
return tcx.ty_error_with_message(DUMMY_SP, "Could not find trait");
};
let assoc_items = tcx.associated_items(trait_def_id);
let assoc_item = assoc_items.find_by_name_and_kind(
tcx,
binding.ident,
match kind {
// I think `<A: T>` type bindings requires that `A` is a type
TypeBindingKind::Constraint { .. }
| TypeBindingKind::Equality { term: Term::Ty(..) } => {
ty::AssocKind::Type
}
TypeBindingKind::Equality { term: Term::Const(..) } => {
ty::AssocKind::Const
}
},
def_id.to_def_id(),
);
if let Some(assoc_item) = assoc_item {
tcx.type_of(tcx.generics_of(assoc_item.def_id).params[idx].def_id)
} else {
// FIXME(associated_const_equality): add a useful error message here.
tcx.ty_error_with_message(
DUMMY_SP,
"Could not find associated const on trait",
)
}
}
Node::GenericParam(&GenericParam {
@ -452,8 +510,7 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
..
}) if ct.hir_id == hir_id => tcx.type_of(tcx.hir().local_def_id(param_hir_id)),
x =>
tcx.ty_error_with_message(
x => tcx.ty_error_with_message(
DUMMY_SP,
&format!("unexpected const parent in type_of(): {x:?}"),
),

46
compiler/rustc_lint/src/builtin.rs
View file

@ -97,30 +97,28 @@ fn pierce_parens(mut expr: &ast::Expr) -> &ast::Expr {
impl EarlyLintPass for WhileTrue {
fn check_expr(&mut self, cx: &EarlyContext<'_>, e: &ast::Expr) {
if let ast::ExprKind::While(cond, _, label) = &e.kind {
if let ast::ExprKind::Lit(ref lit) = pierce_parens(cond).kind {
if let ast::LitKind::Bool(true) = lit.kind {
if !lit.span.from_expansion() {
let condition_span = e.span.with_hi(cond.span.hi());
cx.struct_span_lint(WHILE_TRUE, condition_span, |lint| {
lint.build(fluent::lint::builtin_while_true)
.span_suggestion_short(
condition_span,
fluent::lint::suggestion,
format!(
"{}loop",
label.map_or_else(String::new, |label| format!(
"{}: ",
label.ident,
))
),
Applicability::MachineApplicable,
)
.emit();
})
}
}
}
if let ast::ExprKind::While(cond, _, label) = &e.kind
&& let ast::ExprKind::Lit(ref lit) = pierce_parens(cond).kind
&& let ast::LitKind::Bool(true) = lit.kind
&& !lit.span.from_expansion()
{
let condition_span = e.span.with_hi(cond.span.hi());
cx.struct_span_lint(WHILE_TRUE, condition_span, |lint| {
lint.build(fluent::lint::builtin_while_true)
.span_suggestion_short(
condition_span,
fluent::lint::suggestion,
format!(
"{}loop",
label.map_or_else(String::new, |label| format!(
"{}: ",
label.ident,
))
),
Applicability::MachineApplicable,
)
.emit();
})
}
}
}