This repository was archived by the owner on Mar 7, 2026. It is now read-only.
Repository navigation
Expand file tree
/
Copy pathmake_function.hpp
More file actions
153 lines (133 loc) · 4.38 KB
/
Copy pathmake_function.hpp
File metadata and controls
153 lines (133 loc) · 4.38 KB
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
// 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_FUNCTION_DWA20011221_HPP
# define MAKE_FUNCTION_DWA20011221_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/python/default_call_policies.hpp>
# include <boost/python/args.hpp>
# include <boost/python/detail/caller.hpp>
# include <boost/python/object/function_object.hpp>
# include <boost/mpl/size.hpp>
# include <boost/mpl/int.hpp>
namespace boost { namespace python {
namespace detail
{
// make_function_aux --
//
// These helper functions for make_function (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.
template <class F, class CallPolicies, class Sig>
object make_function_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
)
{
return objects::function_object(
detail::caller<F,CallPolicies,Sig>(f, p)
);
}
// 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_function_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 BOOST_ATTRIBUTE_UNUSED;
return objects::function_object(
detail::caller<F,CallPolicies,Sig>(f, p)
, kw);
}
// Helpers for make_function when called with 3 arguments. These
// dispatch functions are used to discriminate between the cases
// when the 3rd argument is keywords or when it is a signature.
//
// @group {
template <class F, class CallPolicies, class Keywords>
object make_function_dispatch(F f, CallPolicies const& policies, Keywords const& kw, mpl::true_)
{
return detail::make_function_aux(
f
, policies
, detail::get_signature(f)
, kw.range()
, mpl::int_<Keywords::size>()
);
}
template <class F, class CallPolicies, class Signature>
object make_function_dispatch(F f, CallPolicies const& policies, Signature const& sig, mpl::false_)
{
return detail::make_function_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_function(F f)
{
return detail::make_function_aux(
f,default_call_policies(), detail::get_signature(f));
}
template <class F, class CallPolicies>
object make_function(F f, CallPolicies const& policies)
{
return detail::make_function_aux(
f, policies, detail::get_signature(f));
}
template <class F, class CallPolicies, class KeywordsOrSignature>
object make_function(
F f
, CallPolicies const& policies
, KeywordsOrSignature const& keywords_or_signature)
{
typedef typename
detail::is_reference_to_keywords<KeywordsOrSignature&>::type
is_kw;
return detail::make_function_dispatch(
f
, policies
, keywords_or_signature
, is_kw()
);
}
template <class F, class CallPolicies, class Keywords, class Signature>
object make_function(
F f
, CallPolicies const& policies
, Keywords const& kw
, Signature const& sig
)
{
return detail::make_function_aux(
f
, policies
, sig
, kw.range()
, mpl::int_<Keywords::size>()
);
}
// }
}}
#endif // MAKE_FUNCTION_DWA20011221_HPP