Rework the traversal of Objective-C categories and extensions to
consider (sub)module visibility.
The bulk of this change replaces myriad hand-rolled loops over the
linked list of Objective-C categories/extensions attached to an
interface declaration with loops using one of the four new category
iterator kinds:
visible_categories_iterator: Iterates over all visible categories
and extensions, hiding any that have their "hidden" bit set. This is
by far the most commonly used iterator.
known_categories_iterator: Iterates over all categories and
extensions, ignoring the "hidden" bit. This tends to be used for
redeclaration-like traversals.
visible_extensions_iterator: Iterates over all visible extensions,
hiding any that have their "hidden" bit set.
known_extensions_iterator: Iterates over all extensions, whether
they are visible to normal name lookup or not.
The effect of this change is that any uses of the visible_ iterators
will respect module-import visibility. See the new tests for examples.
Note that the old accessors for categories and extensions are gone;
there are *Raw() forms for some of them, for those (few) areas of the
compiler that have to manipulate the linked list of categories
directly. This is generally discouraged.
Part two of <rdar://problem/10634711>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172665 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaLookup.cpp b/lib/Sema/SemaLookup.cpp
index 4ae27a4..4bdc1dc 100644
--- a/lib/Sema/SemaLookup.cpp
+++ b/lib/Sema/SemaLookup.cpp
@@ -2913,10 +2913,12 @@
// Traverse the contexts of Objective-C classes.
if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>(Ctx)) {
// Traverse categories.
- for (ObjCCategoryDecl *Category = IFace->getCategoryList();
- Category; Category = Category->getNextClassCategory()) {
+ for (ObjCInterfaceDecl::visible_categories_iterator
+ Cat = IFace->visible_categories_begin(),
+ CatEnd = IFace->visible_categories_end();
+ Cat != CatEnd; ++Cat) {
ShadowContextRAII Shadow(Visited);
- LookupVisibleDecls(Category, Result, QualifiedNameLookup, false,
+ LookupVisibleDecls(*Cat, Result, QualifiedNameLookup, false,
Consumer, Visited);
}