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115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef DEF_DWA200292_HPP
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# define DEF_DWA200292_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/object_fwd.hpp>
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# include <boost/python/make_function.hpp>
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# include <boost/python/detail/def_helper.hpp>
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# include <boost/python/detail/overloads_fwd.hpp>
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# include <boost/python/scope.hpp>
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# include <boost/python/signature.hpp>
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# include <boost/python/detail/scope.hpp>
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namespace boost { namespace python {
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namespace detail
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{
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namespace error
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{
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// Compile-time error messages
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template <bool> struct multiple_functions_passed_to_def;
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template <> struct multiple_functions_passed_to_def<false> { typedef char type; };
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}
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//
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// def_from_helper --
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//
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// Use a def_helper to define a regular wrapped function in the current scope.
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template <class F, class Helper>
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void def_from_helper(
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char const* name, F const& fn, Helper const& helper)
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{
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// Must not try to use default implementations except with method definitions.
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typedef typename error::multiple_functions_passed_to_def<
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Helper::has_default_implementation
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>::type assertion BOOST_ATTRIBUTE_UNUSED;
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detail::scope_setattr_doc(
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name, boost::python::make_function(
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fn
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, helper.policies()
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, helper.keywords())
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, helper.doc()
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);
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}
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//
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// These two overloads discriminate between def() as applied to
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// regular functions and def() as applied to the result of
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// BOOST_PYTHON_FUNCTION_OVERLOADS(). The final argument is used to
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// discriminate.
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//
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template <class Fn, class A1>
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void
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def_maybe_overloads(
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char const* name
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, Fn fn
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, A1 const& a1
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, ...)
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{
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detail::def_from_helper(name, fn, def_helper<A1>(a1));
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}
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template <class StubsT, class SigT>
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void def_maybe_overloads(
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char const* name
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, SigT sig
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, StubsT const& stubs
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, detail::overloads_base const*)
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{
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scope current;
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detail::define_with_defaults(
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name, stubs, current, detail::get_signature(sig));
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}
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template <class T>
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object make_function1(T fn, ...) { return make_function(fn); }
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inline
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object make_function1(object const& x, object const*) { return x; }
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}
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template <class Fn>
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void def(char const* name, Fn fn)
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{
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detail::scope_setattr_doc(name, detail::make_function1(fn, &fn), 0);
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}
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template <class Arg1T, class Arg2T>
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void def(char const* name, Arg1T arg1, Arg2T const& arg2)
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{
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detail::def_maybe_overloads(name, arg1, arg2, &arg2);
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}
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template <class F, class A1, class A2>
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void def(char const* name, F f, A1 const& a1, A2 const& a2)
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{
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detail::def_from_helper(name, f, detail::def_helper<A1,A2>(a1,a2));
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}
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template <class F, class A1, class A2, class A3>
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void def(char const* name, F f, A1 const& a1, A2 const& a2, A3 const& a3)
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{
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detail::def_from_helper(name, f, detail::def_helper<A1,A2,A3>(a1,a2,a3));
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}
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}} // namespace boost::python
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#endif // DEF_DWA200292_HPP
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