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
|
#ifndef BOOST_METAPARSE_V1_IMPL_CONCAT_HPP
#define BOOST_METAPARSE_V1_IMPL_CONCAT_HPP
// Copyright Abel Sinkovics (abel@sinkovics.hu) 2013.
// 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)
#include <boost/metaparse/config.hpp>
#include <boost/metaparse/v1/fwd/string.hpp>
#include <boost/preprocessor/arithmetic/dec.hpp>
#include <boost/preprocessor/arithmetic/inc.hpp>
#include <boost/preprocessor/arithmetic/mul.hpp>
#include <boost/preprocessor/arithmetic/sub.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/punctuation/comma_if.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
namespace boost
{
namespace metaparse
{
namespace v1
{
namespace impl
{
template <class A, class B>
struct concat;
#ifdef BOOST_METAPARSE_VARIADIC_STRING
template <char... As, char... Bs>
struct concat<string<As...>, string<Bs...>> : string<As..., Bs...> {};
#else
template <class A, class B>
struct concat_impl;
#ifdef BOOST_METAPARSE_ARG
# error BOOST_METAPARSE_ARG already defined
#endif
#define BOOST_METAPARSE_ARG(z, n, unused) \
BOOST_PP_CAT(B, BOOST_PP_INC(n))
#ifdef BOOST_METAPARSE_CONCAT
# error BOOST_METAPARSE_CONCAT already defined
#endif
#define BOOST_METAPARSE_CONCAT(z, n, unused) \
template < \
BOOST_PP_ENUM_PARAMS(n, int A) BOOST_PP_COMMA_IF(n) \
BOOST_PP_ENUM_PARAMS(BOOST_METAPARSE_LIMIT_STRING_SIZE, int B) \
> \
struct \
concat_impl< \
string< \
BOOST_PP_ENUM_PARAMS(n, A) \
BOOST_PP_COMMA_IF( \
BOOST_PP_MUL( \
BOOST_PP_SUB(BOOST_METAPARSE_LIMIT_STRING_SIZE, n), \
n \
) \
) \
BOOST_PP_ENUM( \
BOOST_PP_SUB(BOOST_METAPARSE_LIMIT_STRING_SIZE, n), \
BOOST_NO_CHAR BOOST_PP_TUPLE_EAT(3), \
~ \
) \
>, \
string< \
BOOST_PP_ENUM_PARAMS(BOOST_METAPARSE_LIMIT_STRING_SIZE, B) \
> \
> : \
concat< \
string<BOOST_PP_ENUM_PARAMS(n, A) BOOST_PP_COMMA_IF(n) B0>, \
string< \
BOOST_PP_ENUM( \
BOOST_PP_DEC(BOOST_METAPARSE_LIMIT_STRING_SIZE), \
BOOST_METAPARSE_ARG, \
~ \
) \
> \
> \
{};
BOOST_PP_REPEAT(
BOOST_METAPARSE_LIMIT_STRING_SIZE,
BOOST_METAPARSE_CONCAT,
~
)
#undef BOOST_METAPARSE_ARG
#undef BOOST_METAPARSE_CONCAT
template <class S>
struct concat<S, string<> > : S {};
template <class A, class B>
struct concat : concat_impl<A, B> {};
#endif
}
}
}
}
#endif
|