From e33ce235a877f376e5589a5c6f2ea2e7162d59cf Mon Sep 17 00:00:00 2001
From: Haoyu Bai <divinekid@gmail.com>
Date: Fri, 5 Jun 2009 12:19:00 +0000
Subject: [PATCH] implemented a arg_from_python converter that converts py3k
 unicode to const char*, not an ideal solution, just experimenting.

[SVN r53653]
---
 include/boost/python/arg_from_python.hpp | 29 ++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/include/boost/python/arg_from_python.hpp b/include/boost/python/arg_from_python.hpp
index 05611edb..5793aac8 100644
--- a/include/boost/python/arg_from_python.hpp
+++ b/include/boost/python/arg_from_python.hpp
@@ -62,6 +62,35 @@ struct arg_from_python<PyObject* const&>
     PyObject* m_source;
 };
 
+#if PY_VERSION_HEX >= 0x03000000
+// specialization for const char *, experimenting
+template <>
+struct arg_from_python<const char*>
+{
+    typedef const char* result_type;
+
+    arg_from_python(PyObject* p) : m_source(p), intermediate(0) {}
+    bool convertible() const
+    {
+        return PyUnicode_Check(m_source);
+    }
+    const char* operator()()
+    {
+        const char* result;
+        intermediate = PyUnicode_AsUTF8String(m_source);
+        result = PyBytes_AsString(intermediate);
+        return result;        
+    }
+    ~arg_from_python()
+    {
+        Py_DECREF(intermediate);
+    }
+ private:
+    PyObject* m_source;
+    PyObject* intermediate;
+};
+#endif
+
 //
 // implementations
 //