[clangd] Make sure constructors do not reference class

Reviewers: gribozavr

Subscribers: ilya-biryukov, ioeric, MaskRay, jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D58815

llvm-svn: 355679

clang-tools-extra/clangd/XRefs.cpp

@@ -15,6 +15,7 @@
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/RecursiveASTVisitor.h"
 #include "clang/Index/IndexDataConsumer.h"
+#include "clang/Index/IndexSymbol.h"
 #include "clang/Index/IndexingAction.h"
 #include "clang/Index/USRGeneration.h"
 #include "llvm/Support/Path.h"
@@ -154,6 +155,10 @@ class DeclarationAndMacrosFinder : public index::IndexDataConsumer {
                       llvm::ArrayRef<index::SymbolRelation> Relations,
                       SourceLocation Loc,
                       index::IndexDataConsumer::ASTNodeInfo ASTNode) override {
+    // Skip non-semantic references.
+    if (Roles & static_cast<unsigned>(index::SymbolRole::NameReference))
+      return true;
+
     if (Loc == SearchedLocation) {
       auto IsImplicitExpr = [](const Expr *E) {
         if (!E)

clang-tools-extra/clangd/index/SymbolCollector.cpp

@@ -211,7 +211,7 @@ getTokenLocation(SourceLocation TokLoc, const SourceManager &SM,
 // the first seen declaration as canonical declaration is not a good enough
 // heuristic.
 bool isPreferredDeclaration(const NamedDecl &ND, index::SymbolRoleSet Roles) {
-  const auto& SM = ND.getASTContext().getSourceManager();
+  const auto &SM = ND.getASTContext().getSourceManager();
   return (Roles & static_cast<unsigned>(index::SymbolRole::Definition)) &&
          isa<TagDecl>(&ND) &&
          !SM.isWrittenInMainFile(SM.getExpansionLoc(ND.getLocation()));
@@ -305,6 +305,10 @@ bool SymbolCollector::handleDeclOccurence(
        Decl::FriendObjectKind::FOK_None) &&
       !(Roles & static_cast<unsigned>(index::SymbolRole::Definition)))
     return true;
+  // Skip non-semantic references, we should start processing these when we
+  // decide to implement renaming with index support.
+  if ((Roles & static_cast<unsigned>(index::SymbolRole::NameReference)))
+    return true;
   // A declaration created for a friend declaration should not be used as the
   // canonical declaration in the index. Use OrigD instead, unless we've already
   // picked a replacement for D

clang-tools-extra/unittests/clangd/XRefsTests.cpp

@@ -1337,6 +1337,15 @@ TEST(FindReferences, WithinAST) {
         }
       )cpp",
 
+      R"cpp(// Constructor
+        struct Foo {
+          [[F^oo]](int);
+        };
+        void foo() {
+          Foo f = [[Foo]](42);
+        }
+      )cpp",
+
       R"cpp(// Typedef
         typedef int [[Foo]];
         int main() {