xtd 1.0.0
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__as_any_object.hpp
Go to the documentation of this file.
1
3#pragma once
5#if !defined(__XTD_CORE_INTERNAL__)
6#error "Do not include this file: Internal use only"
7#endif
9
11namespace xtd {
13 template<typename type_t, typename bool_t>
14 struct __enum_any_object__ {};
15
16 template<typename type_t>
17 struct __enum_any_object__<type_t, std::true_type> {
18 auto operator()(const any_object& o) const -> type_t {return as<enum_object<type_t>>(o.value());}
19 };
20
21 template<typename type_t>
22 struct __enum_any_object__<type_t, std::false_type> {
23 auto operator()(const any_object& o) const -> type_t {xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);}
24 };
25
26 template<typename type_t, typename bool_t>
27 struct __polymorphic_any_object__ {};
28
29 template<typename type_t>
30 struct __polymorphic_any_object__<type_t, std::true_type> {
31 auto operator()(const any_object& o) const -> type_t {return as<type_t>(o.value());}
32 };
33
34 template<typename type_t>
35 struct __polymorphic_any_object__<type_t, std::false_type> {
36 auto operator()(const any_object& o) const -> type_t {return __enum_any_object__<type_t, typename std::is_enum<type_t>::type> {}(o);}
37 };
39
58 template<typename type_t>
59 requires (!std::integral<type_t> || std::same_as<type_t, bool>)
60 [[nodiscard]] inline auto as(any_object& o) -> type_t {
61 if (is<box<type_t>>(o.value())) return as<box<type_t >> (o.value()).value;
62 return __polymorphic_any_object__<type_t, typename std::is_polymorphic<type_t>::type> {}(o);
63 }
64
66 template<typename type_t>
67 requires (std::integral<type_t> && !std::same_as<type_t, bool>)
68 [[nodiscard]] inline auto as(any_object& o) -> type_t {
69 if (xtd::is<xtd::box_integer<xtd::byte>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::byte>&>(o.value()).value);
70 if (xtd::is<xtd::box_integer<xtd::int16>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::int16>&>(o.value()).value);
71 if (xtd::is<xtd::box_integer<xtd::int32>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::int32>&>(o.value()).value);
72 if (xtd::is<xtd::box_integer<xtd::int64>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::int64>&>(o.value()).value);
73 if (xtd::is<xtd::box_integer<xtd::sbyte>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::sbyte>&>(o.value()).value);
74 if (xtd::is<xtd::box_integer<xtd::slong>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::slong>&>(o.value()).value);
75 if (xtd::is<xtd::box_integer<xtd::uint16>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::uint16>&>(o.value()).value);
76 if (xtd::is<xtd::box_integer<xtd::uint32>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::uint32>&>(o.value()).value);
77 if (xtd::is<xtd::box_integer<xtd::uint64>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::uint64>&>(o.value()).value);
78 if (xtd::is<xtd::box_integer<xtd::ulong>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::ulong>&>(o.value()).value);
79 xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
80 }
81
82 template<>
83 [[nodiscard]] inline auto as<xtd::null_ptr>(any_object& o) -> xtd::null_ptr {
84 if (o.has_value()) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
85 return xtd::null;
86 }
88
107 template<typename type_t>
108 requires (!xtd::integer<type_t> || std::same_as<type_t, bool>)
109 [[nodiscard]] inline auto as(const any_object& o) -> type_t {
110 if (is<box<type_t>>(o.value())) return as<box<type_t >> (o.value()).value;
111 return __polymorphic_any_object__<type_t, typename std::is_polymorphic<type_t>::type> {}(o);
112 }
113
115 template<typename type_t>
116 requires (xtd::integer<type_t> && !std::same_as<type_t, bool>)
117 [[nodiscard]] inline auto as(const any_object& o) -> type_t {
118 if (xtd::is<xtd::box_integer<xtd::byte>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::byte>&>(o.value()).value);
119 if (xtd::is<xtd::box_integer<xtd::int16>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::int16>&>(o.value()).value);
120 if (xtd::is<xtd::box_integer<xtd::int32>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::int32>&>(o.value()).value);
121 if (xtd::is<xtd::box_integer<xtd::int64>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::int64>&>(o.value()).value);
122 if (xtd::is<xtd::box_integer<xtd::sbyte>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::sbyte>&>(o.value()).value);
123 if (xtd::is<xtd::box_integer<xtd::slong>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::slong>&>(o.value()).value);
124 if (xtd::is<xtd::box_integer<xtd::uint16>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::uint16>&>(o.value()).value);
125 if (xtd::is<xtd::box_integer<xtd::uint32>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::uint32>&>(o.value()).value);
126 if (xtd::is<xtd::box_integer<xtd::uint64>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::uint64>&>(o.value()).value);
127 if (xtd::is<xtd::box_integer<xtd::ulong>>(o.value())) return xtd::as<type_t>(static_cast<const xtd::box_integer<xtd::ulong>&>(o.value()).value);
128 xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
129 }
130
131 template<>
132 [[nodiscard]] inline auto as<xtd::null_ptr>(const any_object& o) -> xtd::null_ptr {
133 if (o.has_value()) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
134 return xtd::null;
135 }
137
156 template<>
157 [[nodiscard]] inline auto as<string>(xtd::any_object& value) -> string {
158 return xtd::convert::to_string(value);
159 }
160
179 template<>
180 [[nodiscard]] inline auto as<string>(const xtd::any_object& value) -> string {
181 return xtd::convert::to_string(value);
182 }
183
185 template<>
186 [[nodiscard]] inline auto as<char*>(xtd::any_object& value) -> char* {
187 if (dynamic_cast<const xtd::string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
188 return const_cast<char*>(dynamic_cast<const xtd::string*>(&value.value())->c_str());
189 }
190 template<>
191 [[nodiscard]] inline auto as<char*>(const xtd::any_object& value) -> char* {
192 if (dynamic_cast<const xtd::string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
193 return const_cast<char*>(dynamic_cast<const xtd::string*>(&value.value())->c_str());
194 }
195 template<>
196 [[nodiscard]] inline auto as<const char*>(xtd::any_object& value) -> const char* {
197 if (dynamic_cast<const xtd::string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
198 return dynamic_cast<const xtd::string*>(&value.value())->c_str();
199 }
200 template<>
201 [[nodiscard]] inline auto as<const char*>(const xtd::any_object& value) -> const char* {
202 if (dynamic_cast<const xtd::string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
203 return dynamic_cast<const xtd::string*>(&value.value())->c_str();
204 }
205
206 template<>
207 [[nodiscard]] inline auto as<xtd::char8*>(xtd::any_object& value) -> xtd::char8* {
208 if (dynamic_cast<const xtd::u8string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
209 return const_cast<xtd::char8*>(dynamic_cast<const xtd::u8string*>(&value.value())->c_str());
210 }
211 template<>
212 [[nodiscard]] inline auto as<xtd::char8*>(const xtd::any_object& value) -> xtd::char8* {
213 if (dynamic_cast<const xtd::u8string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
214 return const_cast<xtd::char8*>(dynamic_cast<const xtd::u8string*>(&value.value())->c_str());
215 }
216 template<>
217 [[nodiscard]] inline auto as<const xtd::char8*>(xtd::any_object& value) -> const xtd::char8* {
218 if (dynamic_cast<const xtd::u8string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
219 return dynamic_cast<const xtd::u8string*>(&value.value())->c_str();
220 }
221 template<>
222 [[nodiscard]] inline auto as<const xtd::char8*>(const xtd::any_object& value) -> const xtd::char8* {
223 if (dynamic_cast<const u8string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
224 return dynamic_cast<const xtd::u8string*>(&value.value())->c_str();
225 }
226
227 template<>
228 [[nodiscard]] inline auto as<xtd::char16*>(xtd::any_object& value) -> xtd::char16* {
229 if (dynamic_cast<const xtd::u16string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
230 return const_cast<xtd::char16*>(dynamic_cast<const xtd::u16string*>(&value.value())->c_str());
231 }
232 template<>
233 [[nodiscard]] inline auto as<xtd::char16*>(const xtd::any_object& value) -> xtd::char16* {
234 if (dynamic_cast<const xtd::u16string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
235 return const_cast<xtd::char16*>(dynamic_cast<const xtd::u16string*>(&value.value())->c_str());
236 }
237 template<>
238 [[nodiscard]] inline auto as<const xtd::char16*>(xtd::any_object& value) -> const xtd::char16* {
239 if (dynamic_cast<const xtd::u16string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
240 return dynamic_cast<const xtd::u16string*>(&value.value())->c_str();
241 }
242 template<>
243 [[nodiscard]] inline auto as<const xtd::char16*>(const xtd::any_object& value) -> const xtd::char16* {
244 if (dynamic_cast<const u16string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
245 return dynamic_cast<const xtd::u16string*>(&value.value())->c_str();
246 }
247
248 template<>
249 [[nodiscard]] inline auto as<xtd::char32*>(xtd::any_object& value) -> xtd::char32* {
250 if (dynamic_cast<const xtd::u32string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
251 return const_cast<xtd::char32*>(dynamic_cast<const xtd::u32string*>(&value.value())->c_str());
252 }
253 template<>
254 [[nodiscard]] inline auto as<xtd::char32*>(const xtd::any_object& value) -> xtd::char32* {
255 if (dynamic_cast<const xtd::u32string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
256 return const_cast<xtd::char32*>(dynamic_cast<const xtd::u32string*>(&value.value())->c_str());
257 }
258 template<>
259 [[nodiscard]] inline auto as<const xtd::char32*>(xtd::any_object& value) -> const xtd::char32* {
260 if (dynamic_cast<const xtd::u32string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
261 return dynamic_cast<const xtd::u32string*>(&value.value())->c_str();
262 }
263 template<>
264 [[nodiscard]] inline auto as<const xtd::char32*>(const xtd::any_object& value) -> const xtd::char32* {
265 if (dynamic_cast<const u32string*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
266 return dynamic_cast<const xtd::u32string*>(&value.value())->c_str();
267 }
268
269 template<>
270 [[nodiscard]] inline auto as<xtd::wchar*>(xtd::any_object& value) -> xtd::wchar* {
271 if (dynamic_cast<const xtd::wstring*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
272 return const_cast<xtd::wchar*>(dynamic_cast<const xtd::wstring*>(&value.value())->c_str());
273 }
274 template<>
275 [[nodiscard]] inline auto as<xtd::wchar*>(const xtd::any_object& value) -> xtd::wchar* {
276 if (dynamic_cast<const xtd::wstring*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
277 return const_cast<xtd::wchar*>(dynamic_cast<const xtd::wstring*>(&value.value())->c_str());
278 }
279 template<>
280 [[nodiscard]] inline auto as<const xtd::wchar*>(xtd::any_object& value) -> const xtd::wchar* {
281 if (dynamic_cast<const xtd::wstring*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
282 return dynamic_cast<const xtd::wstring*>(&value.value())->c_str();
283 }
284 template<>
285 [[nodiscard]] inline auto as<const xtd::wchar*>(const xtd::any_object& value) -> const xtd::wchar* {
286 if (dynamic_cast<const wstring*>(&value.value()) == nullptr) xtd::helpers::throw_helper::throws(xtd::helpers::exception_case::invalid_cast);
287 return dynamic_cast<const xtd::wstring*>(&value.value())->c_str();
288 }
290}
xtd::any_object
Represent a polymorphic wrapper capable of holding any type.
Definition any_object.hpp:30
xtd::basic_string::c_str
auto c_str() const noexcept -> const_pointer
Returns a pointer to a null-terminated character array with data equivalent to those stored in the st...
Definition basic_string.hpp:336
xtd::box_integer
Represents a boxed integer object.
Definition box_integer.hpp:55
xtd::convert::to_string
static auto to_string(xtd::any value) -> xtd::string
Convert xtd::any to string.
xtd::helpers::throw_helper::throws
static auto throws(xtd::helpers::exception_case exception_case, const source_location &location=source_location::current()) -> void
Throws an exption with specified exception case.
xtd::integer
Definition integer.hpp:12
xtd::expressions::operator_precedence::value
@ value
Represnets the constant operator precedence (42).
Definition operator_precedence.hpp:30
xtd::helpers::exception_case::invalid_cast
@ invalid_cast
The cast is not valid.
Definition exception_case.hpp:63
xtd::u8string
xtd::basic_string< xtd::char8 > u8string
Represents text as a sequence of UTF-8 code units.
Definition __string_definitions.hpp:76
xtd::u32string
xtd::basic_string< xtd::char32 > u32string
Represents text as a sequence of UTF-32 code units.
Definition __string_definitions.hpp:65
xtd::string
xtd::basic_string< char > string
Represents text as a sequence of UTF-8 code units.
Definition __string_definitions.hpp:43
xtd::u16string
xtd::basic_string< xtd::char16 > u16string
Represents text as a sequence of UTF-16 code units.
Definition __string_definitions.hpp:54
xtd::wstring
xtd::basic_string< xtd::wchar > wstring
Represents text as a sequence of UTF-16 code unit on Windows or UTF-32 code unit on non-Windows syste...
Definition __string_definitions.hpp:87
xtd::char8
char8_t char8
Represents a 8-bit unicode character.
Definition char8.hpp:26
xtd::null
null_ptr null
Represents a null pointer value.
xtd::wchar
wchar_t wchar
Represents a wide character.
Definition wchar.hpp:24
xtd::null_ptr
std::nullptr_t null_ptr
Represents the null_opt alias on std::nullptr_t.
Definition null_ptr.hpp:19
xtd::char16
char16_t char16
Represents a 16-bit unicode character.
Definition char16.hpp:26
xtd::char32
char32_t char32
Represents a 32-bit unicode character.
Definition char32.hpp:23
xtd::as
auto as(any_object &o) -> type_t
Casts a type into another type.
Definition __as_any_object.hpp:60
xtd::is
auto is(xtd::any value) -> bool
Checks if the result of an expression is compatible with a given type.
Definition is.hpp:485
xtd::number_styles::integer
@ integer
Indicates that the allow_leading_white, allow_trailing_white, and allow_leading_sign styles are used....
Definition number_styles.hpp:44
xtd::console_key::o
@ o
The O key.
Definition console_key.hpp:116
xtd
The xtd namespace contains all fundamental classes to access Hardware, Os, System,...
Definition abstract_object.hpp:8
xtd::operator()
auto operator()(size_type index) const -> const_reference
Gets the element at the specified zero-based index.
Definition read_only_span.hpp:401
xtd::box
Represents a boxed object.
Definition box.hpp:55
xtd::box::value
value_type value
Gets or sets the underlying value.
Definition box.hpp:105
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