Added support for keeping track of extern "C" contexts in classes/structs.

src/AST/Namespace.cs

@@ -24,6 +24,9 @@ namespace CppSharp.AST
         // Used to keep track of anonymous declarations.
         public Dictionary<ulong, Declaration> Anonymous; 
 
+        // True if the context is inside an extern "C" context.
+        public bool IsExternCContext;
+
         protected DeclarationContext()
         {
             Namespaces = new List<Namespace>();

src/Core/Parser/ASTConverter.cs

@@ -1039,6 +1039,7 @@ namespace CppSharp
             _class.HasNonTrivialDefaultConstructor = @class.HasNonTrivialDefaultConstructor;
             _class.HasNonTrivialCopyConstructor = @class.HasNonTrivialCopyConstructor;
             _class.HasNonTrivialDestructor = @class.HasNonTrivialDestructor;
+            _class.IsExternCContext = @class.IsExternCContext;
 
             _class.Layout = VisitClassLayout(@class.Layout);
         }

src/CppParser/AST.h

@@ -618,6 +618,7 @@ struct CS_API Class : public DeclarationContext
     bool HasNonTrivialDefaultConstructor;
     bool HasNonTrivialCopyConstructor;
     bool HasNonTrivialDestructor;
+    bool IsExternCContext;
 
     ClassLayout Layout;
 };

src/CppParser/Parser.cpp

@@ -598,6 +598,8 @@ void Parser::WalkRecordCXX(clang::CXXRecordDecl* Record, Class* RC)
     RC->HasNonTrivialCopyConstructor = Record->hasNonTrivialCopyConstructor();
     RC->HasNonTrivialDestructor = Record->hasNonTrivialDestructor();
 
+    RC->IsExternCContext = Record->isExternCContext();
+
     bool hasLayout = !Record->isDependentType() && !Record->isInvalidDecl();
 
     // Get the record layout information.

src/Parser/Parser.cpp

@@ -557,6 +557,8 @@ void Parser::WalkRecordCXX(clang::CXXRecordDecl* Record,
     RC->HasNonTrivialCopyConstructor = Record->hasNonTrivialCopyConstructor();
     RC->HasNonTrivialDestructor = Record->hasNonTrivialDestructor();
 
+    RC->IsExternCContext = Record->isExternCContext();
+
     bool hasLayout = !Record->isDependentType() && !Record->isInvalidDecl();
 
     // Get the record layout information.