Add first pieces of support for parsing and representing

extern "C" in C++ mode.  Patch by Mike Stump!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45904 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/Parse/Parser.cpp b/Parse/Parser.cpp
index cc2c5d90c9..eeced570bb 100644
--- a/Parse/Parser.cpp
+++ b/Parse/Parser.cpp
@@ -386,6 +386,15 @@ Parser::DeclTy *Parser::ParseDeclarationOrFunctionDefinition() {
     return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 
   }
   
+  // If the declspec consisted only of 'extern' and we have a string
+  // literal following it, this must be a C++ linkage specifier like
+  // 'extern "C"'.
+  // FIXME: This should be limited to just C++/ObjectiveC++
+  if (Tok.is(tok::string_literal) &&
+      DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
+      DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier)
+    return ParseLinkage(Declarator::FileContext);
+
   // Parse the first declarator.
   Declarator DeclaratorInfo(DS, Declarator::FileContext);
   ParseDeclarator(DeclaratorInfo);