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Implement destructuring for all aggregates and for references

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This commit is contained in:
Oliver Scherer
2020-07-01 15:10:51 +02:00
parent 34c62e0abc
commit b2532a8730
18 changed files with 312 additions and 115 deletions
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3
compiler/rustc_mir/src/const_eval/mod.rs
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@@ -93,8 +93,7 @@ pub(crate) fn deref_const<'tcx>(
MemPlaceMeta::None => mplace.layout.ty,
MemPlaceMeta::Poison => bug!("poison metadata in `deref_const`: {:#?}", mplace),
// In case of unsized types, figure out the real type behind.
MemPlaceMeta::Meta(scalar) => match mplace.layout.ty.kind {
ty::Dynamic(..) => ecx.read_drop_type_from_vtable(scalar).unwrap().1,
MemPlaceMeta::Meta(scalar) => match mplace.layout.ty.kind() {
ty::Str => bug!("there's no sized equivalent of a `str`"),
ty::Slice(elem_ty) => tcx.mk_array(elem_ty, scalar.to_machine_usize(&tcx).unwrap()),
_ => bug!(