[clangd] Handle the missing injectedClassNameType in targetDecl.

Reviewers: sammccall

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D73102

(cherry picked from commit 5d4e899)

Author: hokein

clang-tools-extra/clangd/FindTarget.cpp

@@ -373,6 +373,11 @@ struct TargetFinder {
       void VisitTagType(const TagType *TT) {
         Outer.add(TT->getAsTagDecl(), Flags);
       }
+
+      void VisitInjectedClassNameType(const InjectedClassNameType *ICNT) {
+        Outer.add(ICNT->getDecl(), Flags);
+      }
+
       void VisitDecltypeType(const DecltypeType *DTT) {
         Outer.add(DTT->getUnderlyingType(), Flags | Rel::Underlying);
       }

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

@@ -286,6 +286,14 @@ TEST_F(TargetDeclTest, Types) {
   )cpp";
   // FIXME: We don't do a good job printing TemplateTypeParmDecls, apparently!
   EXPECT_DECLS("SizeOfPackExpr", "");
+
+  Code = R"cpp(
+    template <typename T>
+    class Foo {
+      void f([[Foo]] x);
+    };
+  )cpp";
+  EXPECT_DECLS("InjectedClassNameTypeLoc", "class Foo");
 }
 
 TEST_F(TargetDeclTest, ClassTemplate) {