Replace Boost function callbacks

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src/ifcgeom/abstract_mapping.h

@@ -25,8 +25,7 @@
 #include "../ifcgeom/conversion_settings.h"
 #include "../plugin/plugin.h"
 
-#include <boost/function.hpp>
-
+#include <functional>
 #include <map>
 #include <string>
 #include <tuple>
@@ -41,10 +40,10 @@ namespace geom {
 		std::vector<express::base> products;
 	};
 
-    /// The filter function (free or member function) or function object (use boost::ref() to reference to it)
+    /// The filter function (free or member function) or function object (use std::ref() to reference to it)
     /// should return true if the geometry for the product is wanted to be included in the output.
     /// http://www.boost.org/doc/libs/1_62_0/doc/html/function/tutorial.html
-	typedef boost::function<bool(const express::base&)> filter_function;
+	typedef std::function<bool(const express::base&)> filter_function;
     
 	class IFC_GEOM_API abstract_mapping {
 	protected:
@@ -80,7 +79,7 @@ namespace geom {
     };
 
 	namespace impl {
-		typedef boost::function3<abstract_mapping*, ifcopenshell::file*, ifcopenshell::geom::settings&, ifcopenshell::logger&> mapping_fn;
+		typedef std::function<abstract_mapping*(ifcopenshell::file*, ifcopenshell::geom::settings&, ifcopenshell::logger&)> mapping_fn;
 
 		class IFC_GEOM_API mapping_registry {
 		public:

src/ifcgeom/converter.h

@@ -9,7 +9,6 @@
 #include "../ifcgeom/abstract_kernel.h"
 #include "../ifcgeom/element.h"
 
-#include <boost/function.hpp>
 #include <memory>
 
 namespace ifcopenshell { namespace geom {

src/ifcgeom/filter.h

@@ -33,7 +33,6 @@
 #include "../ifcgeom/abstract_mapping.h"
 
 #include <boost/foreach.hpp>
-#include <boost/function.hpp>
 #include <boost/regex.hpp>
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/case_conv.hpp>

src/ifcgeom/function_item_evaluator.h

@@ -3,8 +3,6 @@
 
 #include "../ifcgeom/taxonomy.h"
 
-#include <boost/function.hpp>
-
 namespace ifcopenshell { namespace geom {
 
 /// @brief Computes a point on a helmert curve at s.

src/ifcgeom/kernel_registry.h

@@ -23,8 +23,7 @@
 #include "../ifcgeom/abstract_kernel.h"
 #include "../plugin/plugin.h"
 
-#include <boost/function.hpp>
-
+#include <functional>
 #include <map>
 #include <memory>
 #include <string>
@@ -43,7 +42,7 @@ namespace ifcopenshell {
 
 			class IFC_GEOM_API kernel_registry {
 			public:
-				typedef boost::function2<abstract_kernel*, ifcopenshell::file*, ifcopenshell::geom::settings&> create_fn;
+				typedef std::function<abstract_kernel*(ifcopenshell::file*, ifcopenshell::geom::settings&)> create_fn;
 
 				void bind(const kernel_info& info, create_fn create, const ifcopenshell::plugin::module& module = ifcopenshell::plugin::module());
 				bool has(const std::string& backend_id) const;

src/ifcgeom/serialization/serialization.h

@@ -7,8 +7,7 @@
 
 #include "ifc_geomserialization_api.h"
 
-#include <boost/function.hpp>
-
+#include <functional>
 #include <map>
 #include <string>
 
@@ -21,8 +20,8 @@ namespace ifcopenshell {
 namespace ifcopenshell::geom {
 class IFC_GEOMSERIALIZATION_API opencascade_geometry_ifc_writer_registry {
 public:
-	typedef boost::function3<express::base, ifcopenshell::file&, const conversion_result_shape&, double> tesselate_fn;
-	typedef boost::function3<express::base, ifcopenshell::file&, const conversion_result_shape&, bool> serialise_fn;
+	typedef std::function<express::base(ifcopenshell::file&, const conversion_result_shape&, double)> tesselate_fn;
+	typedef std::function<express::base(ifcopenshell::file&, const conversion_result_shape&, bool)> serialise_fn;
 
 	void bind(const std::string& schema_name, serialise_fn serialise, tesselate_fn tesselate, const ifcopenshell::plugin::module& module = ifcopenshell::plugin::module());
 	express::base tesselate(ifcopenshell::file& f, const conversion_result_shape& shape, double deflection) const;

src/ifcgeom/tree_registry.h

@@ -23,8 +23,7 @@
 #include "tree.h"
 #include "../plugin/plugin.h"
 
-#include <boost/function.hpp>
-
+#include <functional>
 #include <map>
 #include <memory>
 #include <string>
@@ -74,7 +73,7 @@ namespace ifcopenshell {
 
 			class IFC_GEOM_API tree_registry {
 			public:
-				typedef boost::function0<abstract_tree*> create_fn;
+				typedef std::function<abstract_tree*()> create_fn;
 
 				void bind(const tree_info& info, create_fn create, const ifcopenshell::plugin::module& module = ifcopenshell::plugin::module());
 				bool has(const std::string& backend_id) const;