[clang][Index] Add a knob to index function parameters in declarations

Summary:
Parameters in declarations are useful for clangd, so that we can
provide symbol information for them as well. It also helps clangd to be
consistent whether a function's definition is accessible or not.

Reviewers: hokein, akyrtzi

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D57949

llvm-svn: 353695

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Index/IndexingContext.cpp b/clang/lib/Index/IndexingContext.cpp
index 0bbd739d741..3d2d7d4ff02 100644
--- a/clang/lib/Index/IndexingContext.cpp
+++ b/clang/lib/Index/IndexingContext.cpp
@@ -40,6 +40,10 @@ bool IndexingContext::shouldIndexImplicitInstantiation() const {
   return IndexOpts.IndexImplicitInstantiation;
 }
 
+bool IndexingContext::shouldIndexParametersInDeclarations() const {
+  return IndexOpts.IndexParametersInDeclarations;
+}
+
 bool IndexingContext::handleDecl(const Decl *D,
                                  SymbolRoleSet Roles,
                                  ArrayRef<SymbolRelation> Relations) {