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Forbid !Sized types and references

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This commit is contained in:
Boxy
2024-07-14 12:50:41 +01:00
committed by Boxy
parent cb12b52f16
commit 42cc42b942
7 changed files with 167 additions and 39 deletions
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16
compiler/rustc_hir_analysis/src/check/wfcheck.rs
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@@ -924,8 +924,6 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) -> Result<(),
if tcx.features().adt_const_params {
enter_wf_checking_ctxt(tcx, hir_ty.span, param.def_id, |wfcx| {
let trait_def_id =
tcx.require_lang_item(LangItem::ConstParamTy, Some(hir_ty.span));
wfcx.register_bound(
ObligationCause::new(
hir_ty.span,
@@ -934,7 +932,13 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) -> Result<(),
),
wfcx.param_env,
ty,
trait_def_id,
tcx.require_lang_item(LangItem::ConstParamTy, Some(hir_ty.span)),
);
wfcx.register_bound(
ObligationCause::new(hir_ty.span, param.def_id, ObligationCauseCode::Misc),
wfcx.param_env,
ty,
tcx.require_lang_item(LangItem::Sized, Some(hir_ty.span)),
);
Ok(())
})
@@ -965,7 +969,11 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) -> Result<(),
cause,
) {
// Can never implement `ConstParamTy`, don't suggest anything.
Err(ConstParamTyImplementationError::NotAnAdtOrBuiltinAllowed) => false,
Err(
ConstParamTyImplementationError::NotAnAdtOrBuiltinAllowed
| ConstParamTyImplementationError::InvalidInnerTyOfBuiltinTy(..)
| ConstParamTyImplementationError::TypeNotSized,
) => false,
// May be able to implement `ConstParamTy`. Only emit the feature help
// if the type is local, since the user may be able to fix the local type.
Err(ConstParamTyImplementationError::InfrigingFields(..)) => {