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//
// MessagePack for C++ static resolution routine
//
// Copyright (C) 2008-2014 FURUHASHI Sadayuki and KONDO Takatoshi
//
// 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 MSGPACK_V1_OBJECT_FWD_HPP
#define MSGPACK_V1_OBJECT_FWD_HPP
#include "msgpack/object_fwd_decl.hpp"
namespace msgpack {
/// @cond
MSGPACK_API_VERSION_NAMESPACE(v1) {
/// @endcond
struct object_array {
uint32_t size;
msgpack::object* ptr;
};
struct object_map {
uint32_t size;
msgpack::object_kv* ptr;
};
struct object_str {
uint32_t size;
const char* ptr;
};
struct object_bin {
uint32_t size;
const char* ptr;
};
struct object_ext {
int8_t type() const { return ptr[0]; }
const char* data() const { return &ptr[1]; }
uint32_t size;
const char* ptr;
};
#if !defined(MSGPACK_USE_CPP03)
template <typename T>
struct has_as {
private:
template <typename U>
static auto check(U*) ->
// Check v1 specialization
typename std::is_same<
decltype(adaptor::as<U>()(std::declval<msgpack::object>())),
T
>::type;
template <typename...>
static std::false_type check(...);
public:
using type = decltype(check<T>(MSGPACK_NULLPTR));
static constexpr bool value = type::value;
};
#endif // !defined(MSGPACK_USE_CPP03)
/// Object class that corresponding to MessagePack format object
/**
* See https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_object
*/
struct object {
union union_type {
bool boolean;
uint64_t u64;
int64_t i64;
#if defined(MSGPACK_USE_LEGACY_NAME_AS_FLOAT)
MSGPACK_DEPRECATED("please use f64 instead")
double dec; // obsolete
#endif // MSGPACK_USE_LEGACY_NAME_AS_FLOAT
double f64;
msgpack::object_array array;
msgpack::object_map map;
msgpack::object_str str;
msgpack::object_bin bin;
msgpack::object_ext ext;
};
msgpack::type::object_type type;
union_type via;
/// Cheking nil
/**
* @return If the object is nil, then return true, else return false.
*/
bool is_nil() const { return type == msgpack::type::NIL; }
#if defined(MSGPACK_USE_CPP03)
/// Get value as T
/**
* If the object can't be converted to T, msgpack::type_error would be thrown.
* @tparam T The type you want to get.
* @return The converted object.
*/
template <typename T>
T as() const;
#else // defined(MSGPACK_USE_CPP03)
/// Get value as T
/**
* If the object can't be converted to T, msgpack::type_error would be thrown.
* @tparam T The type you want to get.
* @return The converted object.
*/
template <typename T>
typename std::enable_if<msgpack::has_as<T>::value, T>::type as() const;
/// Get value as T
/**
* If the object can't be converted to T, msgpack::type_error would be thrown.
* @tparam T The type you want to get.
* @return The converted object.
*/
template <typename T>
typename std::enable_if<!msgpack::has_as<T>::value, T>::type as() const;
#endif // defined(MSGPACK_USE_CPP03)
/// Convert the object
/**
* If the object can't be converted to T, msgpack::type_error would be thrown.
* @tparam T The type of v.
* @param v The value you want to get. `v` is output parameter. `v` is overwritten by converted value from the object.
* @return The reference of `v`.
*/
template <typename T>
typename msgpack::enable_if<
!msgpack::is_array<T>::value && !msgpack::is_pointer<T>::value,
T&
>::type
convert(T& v) const;
template <typename T, std::size_t N>
T (&convert(T(&v)[N]) const)[N];
#if !defined(MSGPACK_DISABLE_LEGACY_CONVERT)
/// Convert the object (obsolete)
/**
* If the object can't be converted to T, msgpack::type_error would be thrown.
* @tparam T The type of v.
* @param v The pointer of the value you want to get. `v` is output parameter. `*v` is overwritten by converted value from the object.
* @return The pointer of `v`.
*/
template <typename T>
MSGPACK_DEPRECATED("please use reference version instead")
typename msgpack::enable_if<
msgpack::is_pointer<T>::value,
T
>::type
convert(T v) const;
#endif // !defined(MSGPACK_DISABLE_LEGACY_CONVERT)
/// Convert the object if not nil
/**
* If the object is not nil and can't be converted to T, msgpack::type_error would be thrown.
* @tparam T The type of v.
* @param v The value you want to get. `v` is output parameter. `v` is overwritten by converted value from the object if the object is not nil.
* @return If the object is nil, then return false, else return true.
*/
template <typename T>
bool convert_if_not_nil(T& v) const;
/// Default constructor. The object is set to nil.
object();
/// Copy constructor. Object is shallow copied.
object(const msgpack_object& o);
/// Construct object from T
/**
* If `v` is the type that is corresponding to MessegePack format str, bin, ext, array, or map,
* you need to call `object(const T& v, msgpack::zone& z)` instead of this constructor.
*
* @tparam T The type of `v`.
* @param v The value you want to convert.
*/
template <typename T>
explicit object(const T& v);
/// Construct object from T
/**
* The object is constructed on the zone `z`.
* See https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_object
*
* @tparam T The type of `v`.
* @param v The value you want to convert.
* @param z The zone that is used by the object.
*/
template <typename T>
object(const T& v, msgpack::zone& z);
/// Construct object from T (obsolete)
/**
* The object is constructed on the zone `z`.
* Use `object(const T& v, msgpack::zone& z)` instead of this constructor.
* See https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_object
*
* @tparam T The type of `v`.
* @param v The value you want to convert.
* @param z The pointer to the zone that is used by the object.
*/
template <typename T>
MSGPACK_DEPRECATED("please use zone reference version instead of the pointer version")
object(const T& v, msgpack::zone* z);
template <typename T>
object& operator=(const T& v);
operator msgpack_object() const;
struct with_zone;
protected:
struct implicit_type;
public:
implicit_type convert() const;
};
class type_error : public std::bad_cast { };
struct object::implicit_type {
implicit_type(object const& o) : obj(o) { }
~implicit_type() { }
template <typename T>
operator T();
private:
object const& obj;
};
/// @cond
} // MSGPACK_API_VERSION_NAMESPACE(v1)
/// @endcond
} // namespace msgpack
#endif // MSGPACK_V1_OBJECT_FWD_HPP
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