Default Arguments Handling

[SVN r14786]

test/defaults.cpp

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+// Copyright David Abrahams 2002. Permission to copy, use,
+// modify, sell and distribute this software is granted provided this
+// copyright notice appears in all copies. This software is provided
+// "as is" without express or implied warranty, and with no claim as
+// to its suitability for any purpose.
+#include <boost/python/module.hpp>
+#include <boost/python/class.hpp>
+#include <sstream>
+
+#if defined(_AIX) && defined(__EDG_VERSION__) && __EDG_VERSION__ < 245
+# include <iostream> // works around a KCC intermediate code generation bug
+#endif
+
+using namespace boost::python;
+using namespace std;
+
+///////////////////////////////////////////////////////////////////////////////
+
+std::string
+foo(int a, char b = 'D', std::string c = "default", double d = 0.0)
+{
+    std::stringstream stream;
+    stream << "int("    << a << "); ";
+    stream << "char("   << b << "); ";
+    stream << "string(" << c  << "); ";
+    stream << "double(" << d << "); ";
+    return stream.str();
+}
+
+BOOST_PYTHON_FUNCTION_GEN(foo_stubs, foo, 1, 4)
+
+///////////////////////////////////////////////////////////////////////////////
+
+struct X {
+
+    std::string
+    bar(int a, char b = 'D', std::string c = "default", double d = 0.0) const
+    {
+        std::stringstream stream;
+        stream << "int("    << a << "); ";
+        stream << "char("   << b << "); ";
+        stream << "string(" << c  << "); ";
+        stream << "double(" << d << "); ";
+        return stream.str();
+    }
+};
+
+BOOST_PYTHON_MEMBER_FUNCTION_GEN(X_bar_stubs, bar, 1, 4)
+
+///////////////////////////////////////////////////////////////////////////////
+
+BOOST_PYTHON_MODULE_INIT(defaults_ext)
+{
+    module      m("defaults_ext");
+    m.def(foo_stubs(), args<std::string, int, char, std::string, double>());
+
+    class_<X>   xc("X");
+    m.add(xc);
+
+    xc.def_init();
+    xc.def(X_bar_stubs(), args<std::string, X const&, int, char, std::string, double>());
+}
+
+#include "module_tail.cpp"

test/defaults.py

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+"""
+
+>>> from defaults_ext import *
+>>> foo(1)
+'int(1); char(D); string(default); double(0); '
+>>> foo(2, 'X')
+'int(2); char(X); string(default); double(0); '
+>>> foo(3, 'Y', "Hello World")
+'int(3); char(Y); string(Hello World); double(0); '
+>>> foo(4, 'Z', "Hi There", 3.3)
+'int(4); char(Z); string(Hi There); double(3.3); '
+>>> x = X()
+>>> x.bar(1)
+'int(1); char(D); string(default); double(0); '
+>>> x.bar(2, 'X')
+'int(2); char(X); string(default); double(0); '
+>>> x.bar(3, 'Y', "Hello World")
+'int(3); char(Y); string(Hello World); double(0); '
+>>> x.bar(4, 'Z', "Hi There", 3.3)
+'int(4); char(Z); string(Hi There); double(3.3); '
+>>>
+
+
+
+"""
+def run(args = None):
+    import sys
+    import doctest
+
+    if args is not None:
+        sys.argv = args
+    return doctest.testmod(sys.modules.get(__name__))
+
+if __name__ == '__main__':
+    print "running..."
+    import sys
+    sys.exit(run()[0])
+
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