1 #ifndef PROTON_VALUE_HPP
2 #define PROTON_VALUE_HPP
25 #include "./codec/encoder.hpp"
26 #include "./codec/decoder.hpp"
27 #include "./internal/type_traits.hpp"
28 #include "./scalar.hpp"
40 PN_CPP_EXTERN std::ostream&
operator<<(std::ostream& o,
const value_base& x);
47 PN_CPP_EXTERN
type_id type()
const;
50 PN_CPP_EXTERN
bool empty()
const;
53 internal::data& data()
const;
54 mutable class internal::data data_;
58 friend class codec::encoder;
59 friend class codec::decoder;
60 friend PN_CPP_EXTERN std::ostream&
operator<<(std::ostream&,
const value_base&);
69 class value :
public internal::value_base,
private internal::comparable<value> {
72 template<
class T,
class U=
void>
struct assignable :
73 public internal::enable_if<codec::is_encodable<T>::value, U> {};
74 template<
class U>
struct assignable<value, U> {};
78 PN_CPP_EXTERN
value();
82 PN_CPP_EXTERN
value(
const value&);
83 PN_CPP_EXTERN value& operator=(
const value&);
84 #if PN_CPP_HAS_RVALUE_REFERENCES
85 PN_CPP_EXTERN
value(value&&);
86 PN_CPP_EXTERN value& operator=(value&&);
91 template <
class T>
value(
const T& x,
typename assignable<T>::type* = 0) { *
this = x; }
94 template <
class T>
typename assignable<T, value&>::type
operator=(
const T& x) {
101 PN_CPP_EXTERN
void clear();
104 template<
class T>
void get(T &t)
const;
105 template<
class T> T
get()
const;
106 PN_CPP_EXTERN int64_t as_int()
const;
107 PN_CPP_EXTERN uint64_t as_uint()
const;
108 PN_CPP_EXTERN
double as_double()
const;
109 PN_CPP_EXTERN std::string as_string()
const;
113 friend PN_CPP_EXTERN
void swap(value&, value&);
117 friend PN_CPP_EXTERN
bool operator==(
const value& x,
const value& y);
118 friend PN_CPP_EXTERN
bool operator<(
const value& x,
const value& y);
122 PN_CPP_EXTERN
explicit value(
const internal::data&);
128 template<
class T> T
get(
const value& v) { T x;
get(v, x);
return x; }
148 if (type_id_is_scalar(v.type())) {
151 x = internal::coerce<T>(s);
161 template<
class T>
void value::get(T &x)
const { x = proton::get<T>(*this); }
162 template<
class T> T
value::get()
const {
return proton::get<T>(*this); }
163 inline int64_t value::as_int()
const {
return proton::coerce<int64_t>(*this); }
164 inline uint64_t value::as_uint()
const {
return proton::coerce<uint64_t>(*this); }
165 inline double value::as_double()
const {
return proton::coerce<double>(*this); }
166 inline std::string value::as_string()
const {
return proton::coerce<std::string>(*this); }
171 #endif // PROTON_VALUE_HPP
A holder for an instance of any scalar AMQP type.
Definition: scalar.hpp:35
std::ostream & operator<<(std::ostream &, const binary &)
Print a binary value.
T get(const value &v)
Get a contained value of type T.
Definition: value.hpp:128
An AMQP message.
Definition: message.hpp:51
The null type, contains no data.
Definition: type_id.hpp:39
void get< null >(const value &v, null &)
Special case for get<null>(), just checks that value contains NULL.
Definition: value.hpp:158
Experimental - Stream-like encoder from AMQP bytes to C++ values.
Definition: encoder.hpp:45
value()
Create a null value.
assignable< T, value & >::type operator=(const T &x)
Assign from any allowed type T.
Definition: value.hpp:94
friend void swap(value &, value &)
swap values
value(const T &x, typename assignable< T >::type *=0)
Construct from any allowed type T.
Definition: value.hpp:91
void coerce(const value &v, T &x)
Like coerce(const value&) but assigns the value to a reference instead of returning it...
Definition: value.hpp:146
type_id
An identifier for AMQP types.
Definition: type_id.hpp:38
T coerce(const value &v)
Coerce the contained value to type T.
Definition: value.hpp:139
Forward declarations for all the C++ types used by Proton to represent AMQP types.
A holder for any AMQP value, simple or complex.
Definition: value.hpp:69
void assert_type_equal(type_id want, type_id got)
Throw a conversion_error if want != got with a message including the names of the types...
void clear()
Reset the value to null.
Experimental - Stream-like decoder from AMQP bytes to C++ values.
Definition: decoder.hpp:51