rsmith added inline comments.
================
Comment at: lib/Sema/SemaDecl.cpp:7464-7470
+ const Type *NonAttributedFTy = R.getTypePtr();
+ while (const auto *AttrTy = NonAttributedFTy->getAs<AttributedType>()) {
+ NonAttributedFTy = AttrTy->getModifiedType().getTypePtr();
+ }
bool HasPrototype =
(D.isFunctionDeclarator() && D.getFunctionTypeInfo().hasPrototype) ||
+ (!isa<FunctionType>(NonAttributedFTy) && R->isFunctionProtoType());
----------------
Rather than hardcoding the forms of type sugar that can appear here, can we
just use `R.getTypePtr()->getAs<FunctionType>()`? I expect we can also have
`ParenType`s wrapping the `FunctionNoProtoType` (`int (f)();`).
================
Comment at: lib/Sema/SemaDecl.cpp:11958-11962
+ // The type location may be attributed; strip the attributes to get to
+ // the function type location.
+ while (auto ATL = TL.getAs<AttributedTypeLoc>()) {
+ TL = ATL.getModifiedLoc();
+ }
----------------
Again, I don't like having this knowledge about what kinds of type sugar can
appear in a function declaration hardcoded here. Please put this somewhere more
central.
A quick look finds that `FunctionDecl::getReturnTypeSourceRange()` gets this
wrong in the opposite direction: it skips parens but not attributes. Maybe we
should have a `TypeLoc::getAsAdjusted<T>` or similar, that walks over type
sugar nodes that represent some kind of type adjustment from a type that was
written as a T to another type that is still canonically a T (`ParenType`,
`AttributedType`, `ElaboratedType`).
https://reviews.llvm.org/D28166
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