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+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#ifndef INCLUDED_GRAS_FACTORY_HPP
+#define INCLUDED_GRAS_FACTORY_HPP
+
+#include <gras/gras.hpp>
+#include <gras/element.hpp>
+#include <PMC/PMC.hpp>
+#include <string>
+
+/*!
+ * Register a block's factory function:
+ * Declare this macro at the global scope in a cpp file.
+ * The block will register at static initialization time.
+ */
+#define GRAS_REGISTER_FACTORY(name, fcn) \
+ GRAS_STATIC_BLOCK(fcn) \
+ {gras::Factory::register_make(name, &fcn);}
+
+namespace gras
+{
+
+/*!
+ * Element factory:
+ * - Register factory functions into the global factory.
+ * - Call make() to create element from global factory.
+ *
+ * Example register a factory function:
+ * gras::Factory::register_make("make_my_block", &make_my_block);
+ *
+ * Example call into the factory:
+ * gras::Element *my_block = gras::Factory::make("make_my_block", arg0, arg1);
+ */
+struct GRAS_API Factory
+{
+ /*******************************************************************
+ * Register API - don't look here, template magic, not helpful
+ ******************************************************************/
+ #for $NARGS in range($MAX_ARGS)
+ template <typename ReturnType, $expand('typename A%d', $NARGS)>
+ static void register_make(const std::string &name, ReturnType(*fcn)($expand('const A%d &', $NARGS)));
+
+ #end for
+ /*******************************************************************
+ * Make API - don't look here, template magic, not helpful
+ ******************************************************************/;
+ #for $NARGS in range($MAX_ARGS)
+ template <$expand('typename A%d', $NARGS)>
+ static Element *make(const std::string &name, $expand('const A%d &', $NARGS));
+
+ #end for
+ /*******************************************************************
+ * Private registration hooks
+ ******************************************************************/
+ static void _register_make(const std::string &, void *);
+ static Element *_handle_make(const std::string &, const PMCC &);
+};
+
+}
+
+#include <gras/detail/factory.hpp>
+
+#endif /*INCLUDED_GRAS_FACTORY_HPP*/