/usr/include/boost/python/make_constructor.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | // Copyright David Abrahams 2001.
// 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)
#ifndef MAKE_CONSTRUCTOR_DWA20011221_HPP
# define MAKE_CONSTRUCTOR_DWA20011221_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/python/default_call_policies.hpp>
# include <boost/python/args.hpp>
# include <boost/python/object_fwd.hpp>
# include <boost/python/object/function_object.hpp>
# include <boost/python/object/make_holder.hpp>
# include <boost/python/object/pointer_holder.hpp>
# include <boost/python/converter/context_result_converter.hpp>
# include <boost/python/detail/caller.hpp>
# include <boost/python/detail/none.hpp>
# include <boost/mpl/size.hpp>
# include <boost/mpl/int.hpp>
# include <boost/mpl/push_front.hpp>
# include <boost/mpl/pop_front.hpp>
# include <boost/mpl/assert.hpp>
namespace boost { namespace python {
namespace detail
{
template <class T>
struct install_holder : converter::context_result_converter
{
install_holder(PyObject* args_)
: m_self(PyTuple_GetItem(args_, 0)) {}
PyObject* operator()(T x) const
{
dispatch(x, is_pointer<T>());
return none();
}
private:
template <class U>
void dispatch(U* x, mpl::true_) const
{
std::auto_ptr<U> owner(x);
dispatch(owner, mpl::false_());
}
template <class Ptr>
void dispatch(Ptr x, mpl::false_) const
{
typedef typename pointee<Ptr>::type value_type;
typedef objects::pointer_holder<Ptr,value_type> holder;
typedef objects::instance<holder> instance_t;
void* memory = holder::allocate(this->m_self, offsetof(instance_t, storage), sizeof(holder));
try {
(new (memory) holder(x))->install(this->m_self);
}
catch(...) {
holder::deallocate(this->m_self, memory);
throw;
}
}
PyObject* m_self;
};
struct constructor_result_converter
{
template <class T>
struct apply
{
typedef install_holder<T> type;
};
};
template <class BaseArgs, class Offset>
struct offset_args
{
offset_args(BaseArgs base_) : base(base_) {}
BaseArgs base;
};
template <int N, class BaseArgs, class Offset>
inline PyObject* get(mpl::int_<N>, offset_args<BaseArgs,Offset> const& args_)
{
return get(mpl::int_<(N+Offset::value)>(), args_.base);
}
template <class BaseArgs, class Offset>
inline unsigned arity(offset_args<BaseArgs,Offset> const& args_)
{
return arity(args_.base) - Offset::value;
}
template <class BasePolicy_ = default_call_policies>
struct constructor_policy : BasePolicy_
{
constructor_policy(BasePolicy_ base) : BasePolicy_(base) {}
// If the BasePolicy_ supplied a result converter it would be
// ignored; issue an error if it's not the default.
#if defined _MSC_VER && _MSC_VER < 1300
typedef is_same<
typename BasePolicy_::result_converter
, default_result_converter
> same_result_converter;
//see above for explanation
BOOST_STATIC_ASSERT(same_result_converter::value) ;
#else
BOOST_MPL_ASSERT_MSG(
(is_same<
typename BasePolicy_::result_converter
, default_result_converter
>::value)
, MAKE_CONSTRUCTOR_SUPPLIES_ITS_OWN_RESULT_CONVERTER_THAT_WOULD_OVERRIDE_YOURS
, (typename BasePolicy_::result_converter)
);
#endif
typedef constructor_result_converter result_converter;
typedef offset_args<typename BasePolicy_::argument_package, mpl::int_<1> > argument_package;
};
template <class InnerSignature>
struct outer_constructor_signature
{
typedef typename mpl::pop_front<InnerSignature>::type inner_args;
typedef typename mpl::push_front<inner_args,object>::type outer_args;
typedef typename mpl::push_front<outer_args,void>::type type;
};
// ETI workaround
template <>
struct outer_constructor_signature<int>
{
typedef int type;
};
//
// These helper functions for make_constructor (below) do the raw work
// of constructing a Python object from some invokable entity. See
// <boost/python/detail/caller.hpp> for more information about how
// the Sig arguments is used.
//
// @group make_constructor_aux {
template <class F, class CallPolicies, class Sig>
object make_constructor_aux(
F f // An object that can be invoked by detail::invoke()
, CallPolicies const& p // CallPolicies to use in the invocation
, Sig const& // An MPL sequence of argument types expected by F
)
{
typedef typename outer_constructor_signature<Sig>::type outer_signature;
typedef constructor_policy<CallPolicies> inner_policy;
return objects::function_object(
objects::py_function(
detail::caller<F,inner_policy,Sig>(f, inner_policy(p))
, outer_signature()
)
);
}
// As above, except that it accepts argument keywords. NumKeywords
// is used only for a compile-time assertion to make sure the user
// doesn't pass more keywords than the function can accept. To
// disable all checking, pass mpl::int_<0> for NumKeywords.
template <class F, class CallPolicies, class Sig, class NumKeywords>
object make_constructor_aux(
F f
, CallPolicies const& p
, Sig const&
, detail::keyword_range const& kw // a [begin,end) pair of iterators over keyword names
, NumKeywords // An MPL integral type wrapper: the size of kw
)
{
enum { arity = mpl::size<Sig>::value - 1 };
typedef typename detail::error::more_keywords_than_function_arguments<
NumKeywords::value, arity
>::too_many_keywords assertion;
typedef typename outer_constructor_signature<Sig>::type outer_signature;
typedef constructor_policy<CallPolicies> inner_policy;
return objects::function_object(
objects::py_function(
detail::caller<F,inner_policy,Sig>(f, inner_policy(p))
, outer_signature()
)
, kw
);
}
// }
//
// These dispatch functions are used to discriminate between the
// cases when the 3rd argument is keywords or when it is a
// signature.
//
// @group Helpers for make_constructor when called with 3 arguments. {
//
template <class F, class CallPolicies, class Keywords>
object make_constructor_dispatch(F f, CallPolicies const& policies, Keywords const& kw, mpl::true_)
{
return detail::make_constructor_aux(
f
, policies
, detail::get_signature(f)
, kw.range()
, mpl::int_<Keywords::size>()
);
}
template <class F, class CallPolicies, class Signature>
object make_constructor_dispatch(F f, CallPolicies const& policies, Signature const& sig, mpl::false_)
{
return detail::make_constructor_aux(
f
, policies
, sig
);
}
// }
}
// These overloaded functions wrap a function or member function
// pointer as a Python object, using optional CallPolicies,
// Keywords, and/or Signature. @group {
//
template <class F>
object make_constructor(F f)
{
return detail::make_constructor_aux(
f,default_call_policies(), detail::get_signature(f));
}
template <class F, class CallPolicies>
object make_constructor(F f, CallPolicies const& policies)
{
return detail::make_constructor_aux(
f, policies, detail::get_signature(f));
}
template <class F, class CallPolicies, class KeywordsOrSignature>
object make_constructor(
F f
, CallPolicies const& policies
, KeywordsOrSignature const& keywords_or_signature)
{
typedef typename
detail::is_reference_to_keywords<KeywordsOrSignature&>::type
is_kw;
return detail::make_constructor_dispatch(
f
, policies
, keywords_or_signature
, is_kw()
);
}
template <class F, class CallPolicies, class Keywords, class Signature>
object make_constructor(
F f
, CallPolicies const& policies
, Keywords const& kw
, Signature const& sig
)
{
return detail::make_constructor_aux(
f
, policies
, sig
, kw.range()
, mpl::int_<Keywords::size>()
);
}
// }
}}
#endif // MAKE_CONSTRUCTOR_DWA20011221_HPP
|