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59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
from gen_function import *
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import string
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def gen_singleton(args):
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return (
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"""// (C) Copyright David Abrahams 2000. Permission to copy, use, modify, sell and
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// distribute this software is granted provided this copyright notice appears
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// in all copies. This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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// The author gratefully acknowleges the support of Dragon Systems, Inc., in
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// producing this work.
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#ifndef SINGLETON_DWA051900_H_
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# define SINGLETON_DWA051900_H_
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# include <boost/python/detail/config.hpp>
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namespace boost { namespace python { namespace detail {
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struct empty {};
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template <class Derived, class Base = empty>
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struct singleton : Base
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{
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typedef singleton singleton_base; // Convenience type for derived class constructors
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static Derived* instance();
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// Pass-through constructors
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"""
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+ gen_functions("""%{
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template <%(class A%n%:, %)>
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%} singleton(%(const A%n& a%n%:, %)) : Base(%(a%n%:, %)) {}
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""", args)
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+ """
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};
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template <class Derived, class Base>
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Derived* singleton<Derived,Base>::instance()
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{
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static Derived x;
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return &x;
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}
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}}} // namespace boost::python::detail
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#endif
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""")
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if __name__ == '__main__':
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import sys
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if len(sys.argv) == 1:
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args = 5
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else:
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args = int(sys.argv[1])
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print gen_singleton(args)
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