[clangd] consider ~^foo() to target the destructor, not the type

This behavior was once deliberate, but i've yet to find someone who likes it.
The reference behavior is unchanged: the `foo` within ~foo is still considered
a reference to the type. This means rename etc still works.

fixes https://github.com/clangd/clangd/issues/179

Differential Revision: https://reviews.llvm.org/D136212

diff --git a/clang-tools-extra/clangd/Selection.cpp b/clang-tools-extra/clangd/Selection.cpp
index 8076370..32b23fa 100644 (file)
--- a/clang-tools-extra/clangd/Selection.cpp
+++ b/clang-tools-extra/clangd/Selection.cpp
@@ -860,7 +860,7 @@ private:
   // is not available to the node's children.
   // Usually empty, but sometimes children cover tokens but shouldn't own them.
   SourceRange earlySourceRange(const DynTypedNode &N) {
-    if (const Decl *D = N.get<Decl>()) {
+    if (const Decl *VD = N.get<VarDecl>()) {
       // We want the name in the var-decl to be claimed by the decl itself and
       // not by any children. Ususally, we don't need this, because source
       // ranges of children are not overlapped with their parent's.
@@ -869,8 +869,20 @@ private:
       //    auto fun = [bar = foo]() { ... }
       //                ~~~~~~~~~   VarDecl
       //                ~~~         |- AutoTypeLoc
-      if (const auto *DD = llvm::dyn_cast<VarDecl>(D))
-        return DD->getLocation();
+      return VD->getLocation();
+    }
+
+    // When referring to a destructor ~Foo(), attribute Foo to the destructor
+    // rather than the TypeLoc nested inside it.
+    // We still traverse the TypeLoc, because it may contain other targeted
+    // things like the T in ~Foo<T>().
+    if (const auto *CDD = N.get<CXXDestructorDecl>())
+      return CDD->getNameInfo().getNamedTypeInfo()->getTypeLoc().getBeginLoc();
+    if (const auto *ME = N.get<MemberExpr>()) {
+      auto NameInfo = ME->getMemberNameInfo();
+      if (NameInfo.getName().getNameKind() ==
+          DeclarationName::CXXDestructorName)
+        return NameInfo.getNamedTypeInfo()->getTypeLoc().getBeginLoc();
     }
 
     return SourceRange();

diff --git a/clang-tools-extra/clangd/unittests/SelectionTests.cpp b/clang-tools-extra/clangd/unittests/SelectionTests.cpp
index bd3df24..d7ea34c 100644 (file)
--- a/clang-tools-extra/clangd/unittests/SelectionTests.cpp
+++ b/clang-tools-extra/clangd/unittests/SelectionTests.cpp
@@ -466,7 +466,10 @@ TEST(SelectionTest, CommonAncestor) {
       {"struct foo { [[int has^h<:32:>]]; };", "FieldDecl"},
       {"struct foo { [[op^erator int()]]; };", "CXXConversionDecl"},
       {"struct foo { [[^~foo()]]; };", "CXXDestructorDecl"},
-      // FIXME: The following to should be class itself instead.
+      {"struct foo { [[~^foo()]]; };", "CXXDestructorDecl"},
+      {"template <class T> struct foo { ~foo<[[^T]]>(){} };",
+       "TemplateTypeParmTypeLoc"},
+      {"struct foo {}; void bar(foo *f) { [[f->~^foo]](); }", "MemberExpr"},
       {"struct foo { [[fo^o(){}]] };", "CXXConstructorDecl"},
 
       {R"cpp(