| 1 | // Boost.TypeErasure library |
| 2 | // |
| 3 | // Copyright 2011 Steven Watanabe |
| 4 | // |
| 5 | // Distributed under the Boost Software License Version 1.0. (See |
| 6 | // accompanying file LICENSE_1_0.txt or copy at |
| 7 | // http://www.boost.org/LICENSE_1_0.txt) |
| 8 | // |
| 9 | // $Id$ |
| 10 | |
| 11 | #include <boost/config.hpp> |
| 12 | |
| 13 | #ifdef BOOST_MSVC |
| 14 | #pragma warning(disable:4244) // conversion from double to int |
| 15 | #endif |
| 16 | |
| 17 | #include <boost/type_erasure/any.hpp> |
| 18 | #include <boost/type_erasure/tuple.hpp> |
| 19 | #include <boost/type_erasure/builtin.hpp> |
| 20 | #include <boost/type_erasure/operators.hpp> |
| 21 | #include <boost/type_erasure/any_cast.hpp> |
| 22 | #include <boost/type_erasure/relaxed.hpp> |
| 23 | #include <boost/mpl/vector.hpp> |
| 24 | |
| 25 | #define BOOST_TEST_MAIN |
| 26 | #include <boost/test/unit_test.hpp> |
| 27 | |
| 28 | using namespace boost::type_erasure; |
| 29 | using boost::core::demangle; |
| 30 | |
| 31 | template<class T = _self> |
| 32 | struct common : ::boost::mpl::vector< |
| 33 | copy_constructible<T>, |
| 34 | typeid_<T> |
| 35 | > {}; |
| 36 | |
| 37 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 38 | |
| 39 | template<class T = _self> |
| 40 | struct movable_common : ::boost::mpl::vector< |
| 41 | destructible<T>, |
| 42 | constructible<T(T&&)>, |
| 43 | typeid_<T> |
| 44 | > {}; |
| 45 | |
| 46 | template<class T = _self, class U = T> |
| 47 | struct move_assignable : ::boost::mpl::vector< |
| 48 | assignable<T, U&&> |
| 49 | > {}; |
| 50 | |
| 51 | #endif |
| 52 | |
| 53 | template<class T, bool CCtor, bool MoveCtor, bool CAssign, bool MoveAssign> |
| 54 | struct test_class |
| 55 | { |
| 56 | explicit test_class(T n) : value(n) {} |
| 57 | test_class(const test_class& src) : value(src.value) |
| 58 | { |
| 59 | BOOST_STATIC_ASSERT_MSG(CCtor, "Copy constructor not allowed." ); |
| 60 | } |
| 61 | test_class& operator=(const test_class& src) |
| 62 | { |
| 63 | BOOST_STATIC_ASSERT_MSG(CAssign, "Copy assignment not allowed." ); |
| 64 | value = src.value; |
| 65 | return *this; |
| 66 | } |
| 67 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 68 | test_class(test_class&& src) : value(src.value) |
| 69 | { |
| 70 | BOOST_STATIC_ASSERT_MSG(MoveCtor, "Move constructor not allowed." ); |
| 71 | src.value = 0; |
| 72 | } |
| 73 | test_class& operator=(test_class&& src) |
| 74 | { |
| 75 | BOOST_STATIC_ASSERT_MSG(MoveAssign, "Move assignment not allowed." ); |
| 76 | value = src.value; |
| 77 | src.value = 0; |
| 78 | return *this; |
| 79 | } |
| 80 | #endif |
| 81 | bool operator==(T n) const { return value == n; } |
| 82 | T value; |
| 83 | }; |
| 84 | |
| 85 | template<class T, bool CCtor, bool MoveCtor, bool CAssign, bool MoveAssign> |
| 86 | std::ostream& operator<<(std::ostream& os, const test_class<T, CCtor, MoveCtor, CAssign, MoveAssign>& t) |
| 87 | { |
| 88 | return os << t.value; |
| 89 | } |
| 90 | |
| 91 | enum copy_info { |
| 92 | id_lvalue = 1, |
| 93 | id_const_lvalue = 2, |
| 94 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 95 | id_rvalue = 3, |
| 96 | id_maybe_const_lvalue = id_lvalue, // used for the id of construction from a raw value |
| 97 | #else |
| 98 | id_rvalue = id_const_lvalue, |
| 99 | id_maybe_const_lvalue = id_const_lvalue, |
| 100 | #endif |
| 101 | id_construct = 4, |
| 102 | id_assign = 8, |
| 103 | id_copy = 16, |
| 104 | id_int = 32 |
| 105 | }; |
| 106 | |
| 107 | #ifdef BOOST_MSVC |
| 108 | #pragma warning(disable:4521) // multiple copy constructors specified |
| 109 | #pragma warning(disable:4522) // multiple assignment operators specified |
| 110 | #endif |
| 111 | |
| 112 | template<class T> |
| 113 | struct copy_tracker |
| 114 | { |
| 115 | copy_tracker(const copy_tracker& src) : value(src.value), info(id_const_lvalue | id_construct | id_copy), moved_from(false) {} |
| 116 | copy_tracker(copy_tracker& src) : value(src.value), info(id_lvalue | id_construct | id_copy), moved_from(false) {} |
| 117 | copy_tracker& operator=(const copy_tracker& src) { value = (src.value); info = (id_const_lvalue | id_assign | id_copy); moved_from = false; return *this; } |
| 118 | copy_tracker& operator=(copy_tracker& src) { value = (src.value); info = (id_lvalue | id_assign | id_copy); moved_from = false; return *this; } |
| 119 | copy_tracker(const T& src) : value(src), info(id_const_lvalue | id_construct | id_int), moved_from(false) {} |
| 120 | copy_tracker(T& src) : value(src), info(id_lvalue | id_construct | id_int), moved_from(false) {} |
| 121 | copy_tracker& operator=(const T& src) { value = (src); info = (id_const_lvalue | id_assign | id_int); moved_from = false; return *this; } |
| 122 | copy_tracker& operator=(T& src) { value = (src); info = (id_lvalue | id_assign | id_int); moved_from = false; return *this; } |
| 123 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 124 | copy_tracker(copy_tracker&& src) : value(std::move(src.value)), info(id_rvalue | id_construct | id_copy), moved_from(false) { src.moved_from = true; } |
| 125 | copy_tracker& operator=(copy_tracker&& src) { value = std::move(src.value); info = (id_rvalue | id_assign | id_copy); moved_from = false; src.moved_from = true; return *this; } |
| 126 | copy_tracker(T&& src) : value(std::move(src)), info(id_rvalue | id_construct | id_int), moved_from(false) {} |
| 127 | copy_tracker& operator=(T&& src) { value = std::move(src); info = (id_rvalue | id_assign | id_int); moved_from = false; return *this; } |
| 128 | #endif |
| 129 | template<class U> |
| 130 | explicit copy_tracker(const U& src) : value(src), info(id_const_lvalue | id_construct | id_int), moved_from(false) {} |
| 131 | T value; |
| 132 | int info; |
| 133 | bool moved_from; |
| 134 | }; |
| 135 | |
| 136 | template<class T> |
| 137 | struct value_holder |
| 138 | { |
| 139 | typedef copy_tracker<T> type; |
| 140 | typedef copy_tracker<T> unwrapped_type; |
| 141 | template<class U> |
| 142 | value_holder(const U& u) : value(u) {} |
| 143 | type value; |
| 144 | type get() { return value; } |
| 145 | const unwrapped_type& unwrap() { return value; } |
| 146 | template<class U> |
| 147 | const U& unwrap() { return value; } |
| 148 | }; |
| 149 | |
| 150 | template<class C, class P> |
| 151 | struct value_holder<any<C, P> > |
| 152 | { |
| 153 | typedef any<C, P> type; |
| 154 | typedef any<C, P> unwrapped_type; |
| 155 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 156 | template<class U> |
| 157 | value_holder(U&& u) : value(std::forward<U>(u)) {} |
| 158 | #else |
| 159 | template<class U> |
| 160 | value_holder(U& u) : value(u) {} |
| 161 | template<class U> |
| 162 | value_holder(const U& u) : value(u) {} |
| 163 | #endif |
| 164 | type value; |
| 165 | type get() { return value; } |
| 166 | const unwrapped_type& unwrap() { return value; } |
| 167 | template<class U> |
| 168 | const U& unwrap() { return any_cast<const U&>(value); } |
| 169 | }; |
| 170 | |
| 171 | template<class T> |
| 172 | struct value_holder<T&> |
| 173 | { |
| 174 | typedef typename value_holder<T>::type& type; |
| 175 | typedef typename value_holder<T>::unwrapped_type unwrapped_type; |
| 176 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 177 | template<class U> |
| 178 | value_holder(U&& u) : impl(std::forward<U>(u)) {} |
| 179 | #else |
| 180 | template<class U> |
| 181 | value_holder(U& u) : impl(u) {} |
| 182 | template<class U> |
| 183 | value_holder(const U& u) : impl(u) {} |
| 184 | #endif |
| 185 | value_holder<T> impl; |
| 186 | type get() { return impl.value; } |
| 187 | const unwrapped_type& unwrap() { return unwrap<unwrapped_type>(); } |
| 188 | template<class U> |
| 189 | const U& unwrap() { return impl.template unwrap<unwrapped_type>(); } |
| 190 | }; |
| 191 | |
| 192 | template<class T> |
| 193 | struct value_holder<const T&> |
| 194 | { |
| 195 | typedef const typename value_holder<T>::type& type; |
| 196 | typedef typename value_holder<T>::unwrapped_type unwrapped_type; |
| 197 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 198 | template<class U> |
| 199 | value_holder(U&& u) : impl(std::forward<U>(u)) {} |
| 200 | #else |
| 201 | template<class U> |
| 202 | value_holder(U& u) : impl(u) {} |
| 203 | template<class U> |
| 204 | value_holder(const U& u) : impl(u) {} |
| 205 | #endif |
| 206 | value_holder<T> impl; |
| 207 | type get() { return impl.value; } |
| 208 | const unwrapped_type& unwrap() { return unwrap<unwrapped_type>(); } |
| 209 | template<class U> |
| 210 | const U& unwrap() { return impl.template unwrap<unwrapped_type>(); } |
| 211 | }; |
| 212 | |
| 213 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 214 | |
| 215 | template<class T> |
| 216 | struct value_holder<T&&> |
| 217 | { |
| 218 | typedef typename value_holder<T>::type&& type; |
| 219 | typedef typename value_holder<T>::unwrapped_type unwrapped_type; |
| 220 | template<class U> |
| 221 | value_holder(U&& u) : impl(std::forward<U>(u)) {} |
| 222 | value_holder<T> impl; |
| 223 | type get() { return std::move(impl.value); } |
| 224 | const unwrapped_type& unwrap() { return unwrap<unwrapped_type>(); } |
| 225 | template<class U> |
| 226 | const U& unwrap() { return impl.template unwrap<unwrapped_type>(); } |
| 227 | }; |
| 228 | |
| 229 | #endif |
| 230 | |
| 231 | template<class T, class A> |
| 232 | struct value_holder<T(A)> |
| 233 | { |
| 234 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| 235 | template<class U> |
| 236 | value_holder(U&& u) : init(std::forward<U>(u)), impl(init.get()) {} |
| 237 | #else |
| 238 | template<class U> |
| 239 | value_holder(U& u) : init(u), impl(init.get()) {} |
| 240 | template<class U> |
| 241 | value_holder(const U& u) : init(u), impl(init.get()) {} |
| 242 | #endif |
| 243 | value_holder<A> init; |
| 244 | value_holder<T> impl; |
| 245 | typedef typename value_holder<T>::type type; |
| 246 | typedef typename value_holder<A>::unwrapped_type unwrapped_type; |
| 247 | type get() { return impl.get(); } |
| 248 | const unwrapped_type& unwrap() { return unwrap<unwrapped_type>(); } |
| 249 | template<class U> |
| 250 | const U& unwrap() { return impl.template unwrap<unwrapped_type>(); } |
| 251 | }; |
| 252 | |
| 253 | #define TEST_ASSIGNMENT_I(LHS, RHS, result, ptr_op, R) \ |
| 254 | try \ |
| 255 | { \ |
| 256 | value_holder<LHS> |
|---|