.. _program_listing_file_src_rdf4cpp_ClosedNamespace.cpp:

Program Listing for File ClosedNamespace.cpp
============================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_rdf4cpp_ClosedNamespace.cpp>` (``src/rdf4cpp/ClosedNamespace.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "ClosedNamespace.hpp"
   
   namespace rdf4cpp {
   
   IRI ClosedNamespace::operator+(std::string_view suffix) const {
       if (auto found = cache_.find(suffix); found != cache_.end()) {
           return IRI{storage::identifier::NodeBackendHandle{found->second, node_storage_}};
       } else {
           std::ostringstream oss;
           oss << "Resource " << suffix << " does not exist within the vocabulary " << namespace_iri_ << '.';
           throw std::runtime_error{oss.str()};
       }
   }
   
   void ClosedNamespace::clear() const {
       // this should not be cleared
   }
   
   }  // namespace rdf4cpp