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
|
#ifndef LY1b9novVl8oDseRTw8dH5lzpNo
#define LY1b9novVl8oDseRTw8dH5lzpNo
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_empty.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_fundamental.hpp>
#include <boost/mpl/unpack_args.hpp>
#include <boost/mpl/list.hpp>
#include <boost/mpl/vector.hpp>
#include <boost/mpl/deref.hpp>
#include <boost/mpl/next.hpp>
#include <boost/mpl/begin.hpp>
#include <boost/mpl/end.hpp>
#include <boost/mpl/front.hpp>
#include <boost/mpl/pop_front.hpp>
#define STATIC_ASSERT_IS_POWER_OF_TWO(x) BOOST_STATIC_ASSERT( !(x & (x-1)) );
template<typename T, long long numerator, long long denominator = 1>
struct StaticVal {
inline static const T value() { return T(numerator) / T(denominator); }
};
// forcing a type conversion of non-ptr types
#define FORCE_CONV(Type, Val) (*(reinterpret_cast<Type *>(& Val)))
// generate a constructor which fails when called
// TODO (beauty): catch error after optimization, before runtime
// (e.g. by linking to a forbidden symbol)
#define GEN_ANYCAST_CTOR_3(name) \
template<class T1, class T2, class T3> name(T1 t1, T2 t2, T3 t3)
// a void you may return
struct Void {
typedef Void type; // for metaprogramming brainfucks
typedef Void con_arg_t;
};
// just to beautify some code
struct BaseCase {};
// prevent instanciation of default or unimplemented cases
#define DO_NOT_INSTANCE(T) BOOST_STATIC_ASSERT((false && boost::is_same<T,T>::value));
// forward decl of a function which will never exist (allows showing
// errors at link time: later than DO_NOT_INSTANCE but before
// assert(false)
void oOoOo_LINK_TIME_ASSERTION_FAILED_oOoOo() __attribute__ ((noreturn));
#define DO_NOT_CALL {oOoOo_LINK_TIME_ASSERTION_FAILED_oOoOo();}
namespace UnpackTypeListImpl {
using namespace boost::mpl;
template<template<typename... T> class Tgt,
typename Iter, typename EndIter,
typename... NewList>
struct Action {
typedef typename Action<Tgt,
typename next<Iter>::type, EndIter,
NewList...,
typename deref<Iter>::type
>::type type;
};
template<template<typename... T> class Tgt, typename EndIter, typename... List>
struct Action<Tgt, EndIter, EndIter, List...> {
typedef Tgt<List...> type;
};
} // NS
// unpack a boost::mpl sequence into a variadic type list
template<template<typename... T> class Tgt,
typename Seq,
typename... NewList>
struct UnpackTypeList {
typedef typename UnpackTypeListImpl
::Action<Tgt,
typename boost::mpl::begin<Seq>::type,
typename boost::mpl::end<Seq>::type,
NewList...>::type type;
};
// create a unique class from a type, given a variadic garbage type
// list; if the type is an empty struct it is not stored but created
// upon every request
// TODO: access functions (right now the stored values are only
// accessed using outraging pointer casts)
template<typename T, bool isEmpty, bool isFund, typename... Garbage> struct MakeUniqueImpl;
template<typename T, typename... Garbage>
struct MakeUnique {
typedef MakeUniqueImpl<T, boost::is_empty<T>::value,
boost::is_fundamental<T>::value, Garbage...> type;
};
template<typename T, typename... Garbage>
struct MakeUniqueImpl<T, true, false, Garbage...> {
MakeUniqueImpl(const T &v) {}
MakeUniqueImpl(T &&v) {}
MakeUniqueImpl() = default;
};
template<typename T, typename... Garbage>
struct MakeUniqueImpl<T, false, true, Garbage...> {
MakeUniqueImpl(const T &v) : v(v) {}
MakeUniqueImpl(T &&v) : v(v) {}
MakeUniqueImpl() = default;
T v;
};
template<typename T, typename... Garbage>
struct MakeUniqueImpl<T, false, false, Garbage...> : protected T {
MakeUniqueImpl(T&& a) : T(std::move(a)) {}
MakeUniqueImpl() = default;
};
#endif // LY1b9novVl8oDseRTw8dH5lzpNo
|
