1 files changed, 154 insertions, 0 deletions
diff --git a/src/boost/libs/python/example/quickstart/embedding.cpp b/src/boost/libs/python/example/quickstart/embedding.cpp
new file mode 100644
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--- /dev/null
+++ b/src/boost/libs/python/example/quickstart/embedding.cpp
@@ -0,0 +1,154 @@
+// Copyright Stefan Seefeld 2005.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/python.hpp>
+
+#include <boost/detail/lightweight_test.hpp>
+#include <iostream>
+
+namespace python = boost::python;
+
+// An abstract base class
+class Base : public boost::noncopyable
+{
+public:
+  virtual ~Base() {};
+  virtual std::string hello() = 0;
+};
+
+// C++ derived class
+class CppDerived : public Base
+{
+public:
+  virtual ~CppDerived() {}
+  virtual std::string hello() { return "Hello from C++!";}
+};
+
+// Familiar Boost.Python wrapper class for Base
+struct BaseWrap : Base, python::wrapper<Base>
+{
+  virtual std::string hello() 
+  {
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
+    // workaround for VC++ 6.x or 7.0, see
+    // http://boost.org/libs/python/doc/tutorial/doc/html/python/exposing.html#python.class_virtual_functions
+    return python::call<std::string>(this->get_override("hello").ptr());
+#else
+    return this->get_override("hello")();
+#endif
+  }
+};
+
+// Pack the Base class wrapper into a module
+BOOST_PYTHON_MODULE(embedded_hello)
+{
+  python::class_<BaseWrap, boost::noncopyable> base("Base");
+}
+
+
+void exec_test()
+{
+    std::cout << "registering extension module embedded_hello..." << std::endl;
+    
+  // Register the module with the interpreter
+  if (PyImport_AppendInittab("embedded_hello", initembedded_hello) == -1)
+    throw std::runtime_error("Failed to add embedded_hello to the interpreter's "
+                 "builtin modules");
+
+  std::cout << "defining Python class derived from Base..." << std::endl;
+  
+  // Retrieve the main module
+  python::object main = python::import("__main__");
+  
+  // Retrieve the main module's namespace
+  python::object global(main.attr("__dict__"));
+
+  // Define the derived class in Python.
+  python::object result = python::exec(
+    "from embedded_hello import *        \n"
+    "class PythonDerived(Base):          \n"
+    "    def hello(self):                \n"
+    "        return 'Hello from Python!' \n",
+    global, global);
+
+  python::object PythonDerived = global["PythonDerived"];
+
+  // Creating and using instances of the C++ class is as easy as always.
+  CppDerived cpp;
+  BOOST_TEST(cpp.hello() == "Hello from C++!");
+
+  std::cout << "testing derived class from C++..." << std::endl;
+  
+  // But now creating and using instances of the Python class is almost
+  // as easy!
+  python::object py_base = PythonDerived();
+  Base& py = python::extract<Base&>(py_base) BOOST_EXTRACT_WORKAROUND;
+
+  // Make sure the right 'hello' method is called.
+  BOOST_TEST(py.hello() == "Hello from Python!");
+
+  std::cout << "success!" << std::endl;
+}
+
+void exec_file_test(std::string const &script)
+{
+    std::cout << "running file " << script << "..." << std::endl;
+    
+    // Run a python script in an empty environment.
+    python::dict global;
+    python::object result = python::exec_file(script.c_str(), global, global);
+
+    // Extract an object the script stored in the global dictionary.
+    BOOST_TEST(python::extract<int>(global["number"]) ==  42);
+    
+    std::cout << "success!" << std::endl;
+}
+
+void exec_test_error()
+{
+    std::cout << "intentionally causing a python exception..." << std::endl;
+    
+    // Execute a statement that raises a python exception.
+    python::dict global;
+    python::object result = python::exec("print unknown \n", global, global);
+
+    std::cout << "Oops! This statement should be skipped due to an exception" << std::endl;
+}
+
+int main(int argc, char **argv)
+{
+  BOOST_TEST(argc == 2);
+  std::string script = argv[1];
+  // Initialize the interpreter
+  Py_Initialize();
+
+  bool error_expected = false;
+  
+  if (
+      python::handle_exception(exec_test)
+      || python::handle_exception(boost::bind(exec_file_test, script))
+      || (
+          (error_expected = true)
+          && python::handle_exception(exec_test_error)
+      )
+
+  )
+  {
+    if (PyErr_Occurred())
+    {
+        if (!error_expected)
+            BOOST_ERROR("Python Error detected");
+        PyErr_Print();
+    }
+    else
+    {
+        BOOST_ERROR("A C++ exception was thrown  for which "
+                    "there was no exception translator registered.");
+    }
+  }
+  
+  // Boost.Python doesn't support Py_Finalize yet, so don't call it!
+  return boost::report_errors();
+}