2 files changed, 19 insertions, 6 deletions
diff --git a/include/xmlreader/span.hxx b/include/xmlreader/span.hxx
index 038241ef1133..f56059b96274 100644
--- a/include/xmlreader/span.hxx
+++ b/include/xmlreader/span.hxx
@@ -77,6 +77,19 @@ struct SAL_WARN_UNUSED OOO_DLLPUBLIC_XMLREADER Span {
     }
 
     rtl::OUString convertFromUtf8() const;
+
+    std::size_t hashCode() const;
+};
+
+}
+
+namespace std {
+
+template<>
+struct hash<::xmlreader::Span>
+{
+    std::size_t operator()(::xmlreader::Span const & s) const
+    { return s.hashCode(); }
 };
 
 }
diff --git a/include/xmlreader/xmlreader.hxx b/include/xmlreader/xmlreader.hxx
index a7f7dbb6d1ce..a553baeb6c3a 100644
--- a/include/xmlreader/xmlreader.hxx
+++ b/include/xmlreader/xmlreader.hxx
@@ -77,8 +77,8 @@ private:
     // elements_ and attributes_):
 
     struct NamespaceData {
-        Span const prefix;
-        int const nsId;
+        Span prefix;
+        int nsId;
 
         NamespaceData():
             nsId(-1) {}
@@ -90,9 +90,9 @@ private:
     typedef std::vector< NamespaceData > NamespaceList;
 
     struct ElementData {
-        Span const name;
-        NamespaceList::size_type const inheritedNamespaces;
-        int const defaultNamespaceId;
+        Span name;
+        NamespaceList::size_type inheritedNamespaces;
+        int defaultNamespaceId;
 
         ElementData(
             Span const & theName,
@@ -173,7 +173,7 @@ private:
     void * fileAddress_;
     NamespaceIris namespaceIris_;
     NamespaceList namespaces_;
-    mutable std::unordered_map<OUString, int> cacheNSIds_;
+    mutable std::unordered_map<Span, int> cacheNSIds_;
     ElementStack elements_;
     char const * pos_;
     char const * end_;