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rustc_layout_scalar_valid_range makes ctors unsafe

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This commit is contained in:
Michael Goulet 2023-08-27 21:04:34 +00:00
parent 59a8294849
commit 0100a94231
3 changed files with 36 additions and 8 deletions
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17
compiler/rustc_hir_analysis/src/collect.rs
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@ -38,6 +38,7 @@ use rustc_trait_selection::infer::InferCtxtExt;
use rustc_trait_selection::traits::error_reporting::suggestions::NextTypeParamName;
use rustc_trait_selection::traits::ObligationCtxt;
use std::iter;
use std::ops::Bound;
mod generics_of;
mod item_bounds;
@ -1144,15 +1145,15 @@ fn fn_sig(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<ty::PolyFnSig<
}
Ctor(data) | Variant(hir::Variant { data, .. }) if data.ctor().is_some() => {
let ty = tcx.type_of(tcx.hir().get_parent_item(hir_id)).instantiate_identity();
let adt_def_id = tcx.hir().get_parent_item(hir_id).def_id.to_def_id();
let ty = tcx.type_of(adt_def_id).instantiate_identity();
let inputs = data.fields().iter().map(|f| tcx.type_of(f.def_id).instantiate_identity());
ty::Binder::dummy(tcx.mk_fn_sig(
inputs,
ty,
false,
hir::Unsafety::Normal,
abi::Abi::Rust,
))
// constructors for structs with `layout_scalar_valid_range` are unsafe to call
let safety = match tcx.layout_scalar_valid_range(adt_def_id) {
(Bound::Unbounded, Bound::Unbounded) => hir::Unsafety::Normal,
_ => hir::Unsafety::Unsafe,
};
ty::Binder::dummy(tcx.mk_fn_sig(inputs, ty, false, safety, abi::Abi::Rust))
}
Expr(&hir::Expr { kind: hir::ExprKind::Closure { .. }, .. }) => {