example of how to include the swig runtime code into external user code

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@6753 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/python/swigrun/Makefile

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+TOP        = ../..
+SWIG       = $(TOP)/../preinst-swig
+CXXSRCS    = example.cxx
+TARGET     = example
+INTERFACE  = example.i
+LIBS       = -lm
+SWIGOPT    = 
+
+all::
+	$(SWIG) -co swigrun.swg
+	$(SWIG) -o pyrun.swg -co python/pyrun.swg  
+	$(SWIG) -o pyrunalias.swg -co python/pyrunalias.swg 
+	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' python_cpp
+	rm -f swigrun.swg pyrun.swg pyrunalias.swg
+
+static::
+	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='mypython' INTERFACE='$(INTERFACE)' python_cpp_static
+
+clean::
+	$(MAKE) -f $(TOP)/Makefile python_clean
+	rm -f $(TARGET).py
+	rm -f swigrun.swg pyrun.swg pyrunalias.swg
+
+check: all
+

SWIG/Examples/python/swigrun/example.cxx

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+/* File : example.cxx */
+
+#include <Python.h>
+#include "swigrun.swg"
+#include "pyrun.swg"
+#include "pyrunalias.swg"
+
+#include "example.h"
+
+
+Manager* convert_to_Manager(PyObject *py_obj)
+{
+  Manager* c_ptr;
+  swig_type_info *ty = SWIG_TypeQuery("Manager *");
+  printf("manager ty %x \n", ty);
+  if (SWIG_ConvertPtr(py_obj, (void **) &c_ptr, ty, 0) == -1) {
+    c_ptr = 0;
+  } else {
+    Py_XINCREF(py_obj);
+  }
+  return c_ptr;
+}
+

SWIG/Examples/python/swigrun/example.h

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+/* File : example.h */
+
+#include <cstdio>
+#include <iostream>
+#include <vector>
+#include <string>
+#include <cmath>
+
+class Employee {
+private:
+	std::string name;
+public:
+	Employee(const char* n): name(n) {}
+	virtual std::string getTitle() { return getPosition() + " " + getName(); }
+	virtual std::string getName() { return name; }
+	virtual std::string getPosition() const { return "Employee"; }
+	virtual ~Employee() { printf("~Employee() @ %p\n", this); }
+};
+
+
+class Manager: public Employee {
+public:
+	Manager(const char* n): Employee(n) {}
+	virtual std::string getPosition() const { return "Manager"; }
+};
+
+
+class EmployeeList {
+	std::vector<Employee*> list;
+public:
+	EmployeeList() {
+		list.push_back(new Employee("Bob"));
+		list.push_back(new Employee("Jane"));
+		list.push_back(new Manager("Ted"));
+	}
+	void addEmployee(Employee *p) {
+		list.push_back(p);
+		std::cout << "New employee added.   Current employees are:" << std::endl;
+		std::vector<Employee*>::iterator i;
+		for (i=list.begin(); i!=list.end(); i++) {
+			std::cout << "  " << (*i)->getTitle() << std::endl;
+		}
+	}
+	const Employee *get_item(int i) {
+		return list[i];
+	}
+	~EmployeeList() { 
+		std::vector<Employee*>::iterator i;
+		std::cout << "~EmployeeList, deleting " << list.size() << " employees." << std::endl;
+		for (i=list.begin(); i!=list.end(); i++) {
+			delete *i;
+		}
+		std::cout << "~EmployeeList empty." << std::endl;
+	}
+};
+
+Manager* convert_to_Manager(PyObject *obj);
+

SWIG/Examples/python/swigrun/example.i

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+/* File : example.i */
+%module(directors="1") example
+%{
+#include "example.h"
+%}
+
+%include "std_vector.i"
+%include "std_string.i"
+
+/* turn on director wrapping for Manager */
+%feature("director") Employee;
+%feature("director") Manager;
+
+%include "example.h"
+

SWIG/Examples/python/swigrun/runme.py

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+# file: runme.py
+
+# This file illustrates the cross language polymorphism using directors.
+
+import example 
+
+
+# CEO class, which overrides Employee::getPosition().
+
+class CEO(example.Manager):
+	def __init__(self, name):
+		example.Manager.__init__(self, name)
+	def getPosition(self):
+		return "CEO"
+	def __del__(self):
+		print "CEO.__del__(),", self.getName()
+		# for shadow class extensions that are not "disowned" and
+		# define a __del__ method, it is very important to call the 
+		# base class __del__.  otherwise the c++ objects will never
+		# be deleted.
+		example.Manager.__del__(self)
+
+
+
+
+e = CEO("Alice")
+m = example.convert_to_Manager(e)
+print m