[modules ts] Basic for module linkage.

In addition to the formal linkage rules, the Modules TS includes cases where
internal-linkage symbols within a module interface unit can be referenced from
outside the module via exported inline functions / templates. We give such
declarations "module-internal linkage", which is formally internal linkage, but
results in an externally-visible symbol.

llvm-svn: 307434

1 files changed, 3 insertions, 1 deletions

diff --git a/clang/lib/Index/IndexSymbol.cpp b/clang/lib/Index/IndexSymbol.cpp
index bf358a37214..0dc3720208c 100644
--- a/clang/lib/Index/IndexSymbol.cpp
+++ b/clang/lib/Index/IndexSymbol.cpp
@@ -69,11 +69,13 @@ bool index::isFunctionLocalSymbol(const Decl *D) {
   if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
     switch (ND->getFormalLinkage()) {
       case NoLinkage:
-      case VisibleNoLinkage:
       case InternalLinkage:
         return true;
+      case VisibleNoLinkage:
       case UniqueExternalLinkage:
+      case ModuleInternalLinkage:
         llvm_unreachable("Not a sema linkage");
+      case ModuleLinkage:
       case ExternalLinkage:
         return false;
     }