Alejandro =?utf-8?q?Álvarez_Ayllón?=,
Alejandro =?utf-8?q?Álvarez_Ayllón?Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/121...@github.com>
================
@@ -1228,35 +1228,45 @@ bool Sema::AttachTypeConstraint(AutoTypeLoc TL,
NonTypeTemplateParmDecl *NewConstrainedParm,
NonTypeTemplateParmDecl *OrigConstrainedParm,
SourceLocation EllipsisLoc) {
- if (NewConstrainedParm->getType().getNonPackExpansionType() != TL.getType()
||
- TL.getAutoKeyword() != AutoTypeKeyword::Auto) {
- Diag(NewConstrainedParm->getTypeSourceInfo()->getTypeLoc().getBeginLoc(),
- diag::err_unsupported_placeholder_constraint)
- << NewConstrainedParm->getTypeSourceInfo()
- ->getTypeLoc()
- .getSourceRange();
- return true;
- }
- // FIXME: Concepts: This should be the type of the placeholder, but this is
- // unclear in the wording right now.
- DeclRefExpr *Ref =
- BuildDeclRefExpr(OrigConstrainedParm, OrigConstrainedParm->getType(),
- VK_PRValue, OrigConstrainedParm->getLocation());
- if (!Ref)
- return true;
- ExprResult ImmediatelyDeclaredConstraint = formImmediatelyDeclaredConstraint(
- *this, TL.getNestedNameSpecifierLoc(), TL.getConceptNameInfo(),
- TL.getNamedConcept(), /*FoundDecl=*/TL.getFoundDecl(), TL.getLAngleLoc(),
- TL.getRAngleLoc(), BuildDecltypeType(Ref),
- OrigConstrainedParm->getLocation(),
- [&](TemplateArgumentListInfo &ConstraintArgs) {
- for (unsigned I = 0, C = TL.getNumArgs(); I != C; ++I)
- ConstraintArgs.addArgument(TL.getArgLoc(I));
- },
- EllipsisLoc);
+ ExprResult ImmediatelyDeclaredConstraint = [&] {
+ if (NewConstrainedParm->getType().getNonPackExpansionType() !=
+ TL.getType() ||
+ TL.getAutoKeyword() != AutoTypeKeyword::Auto) {
+ Diag(NewConstrainedParm->getTypeSourceInfo()->getTypeLoc().getBeginLoc(),
+ diag::err_unsupported_placeholder_constraint)
+ << NewConstrainedParm->getTypeSourceInfo()
+ ->getTypeLoc()
+ .getSourceRange();
+ return ExprResult();
+ }
+
+ // FIXME: Concepts: This should be the type of the placeholder, but this is
+ // unclear in the wording right now.
+ DeclRefExpr *Ref =
+ BuildDeclRefExpr(OrigConstrainedParm, OrigConstrainedParm->getType(),
+ VK_PRValue, OrigConstrainedParm->getLocation());
+ assert(Ref != nullptr && "Unexpected nullptr!");
+
+ return formImmediatelyDeclaredConstraint(
+ *this, TL.getNestedNameSpecifierLoc(), TL.getConceptNameInfo(),
+ TL.getNamedConcept(), /*FoundDecl=*/TL.getFoundDecl(),
+ TL.getLAngleLoc(), TL.getRAngleLoc(), BuildDecltypeType(Ref),
+ OrigConstrainedParm->getLocation(),
+ [&](TemplateArgumentListInfo &ConstraintArgs) {
+ for (unsigned I = 0, C = TL.getNumArgs(); I != C; ++I)
+ ConstraintArgs.addArgument(TL.getArgLoc(I));
+ },
+ EllipsisLoc);
+ }();
+
if (ImmediatelyDeclaredConstraint.isInvalid() ||
- !ImmediatelyDeclaredConstraint.isUsable())
+ !ImmediatelyDeclaredConstraint.isUsable()) {
+ NewConstrainedParm->setPlaceholderTypeConstraint(
+ RecoveryExpr::Create(Context, OrigConstrainedParm->getType(),
----------------
zyn0217 wrote:
> and the trailing object should probably be initialized to null on the
> constructor of NonTypeTemplateParmDecl to catch any other accidental
> uninitialized value.
We have a bit flag `TypeConstraintInitialized` in `TemplateTypeParmDecl` to
represent a state of "having constraint attached but uninitialized (because of
invalid constraint expression)". I think it'd be better to do the same thing in
NonTypeTemplateParmDecl, or the reverse for consistency.
https://github.com/llvm/llvm-project/pull/121768
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
