Adapted FunctionBase template to accept multiple argument types

* FunctionBase::argument_tuple is a std::tuple specialization type specialized on the argument types passed inside the variadic template argument of FunctionBase
* added tuple Mapper and XObjectValue helper namespaces containing recursive tuple construction and XObjectPtr value extraction logic
* changed all external function implementations accordingly
* this change was implemented to uniformly support different external function argument types than std::string

1 files changed, 17 insertions, 0 deletions

diff --git a/src/support/tuple/xobject_value.h b/src/support/tuple/xobject_value.h
new file mode 100644
index 0000000..bb602a4
--- /dev/null
+++ b/src/support/tuple/xobject_value.h
@@ -0,0 +1,17 @@
+#ifndef INPUTXSLT_SRC_SUPPORT_TUPLE_XOBJECT_VALUE_H_
+#define INPUTXSLT_SRC_SUPPORT_TUPLE_XOBJECT_VALUE_H_
+
+#include <xalanc/XPath/XObject.hpp>
+
+#include "common.h"
+
+namespace InputXSLT {
+
+namespace XObjectValue {
+	template <typename Type>
+	Type get(const xalan::XObjectPtr&);
+}
+
+}
+
+#endif  // INPUTXSLT_SRC_SUPPORT_TUPLE_XOBJECT_VALUE_H_