1 #ifndef PROTON_VALUE_HPP 2 #define PROTON_VALUE_HPP 27 #include "./internal/type_traits.hpp" 31 #include <proton/type_compat.h> 45 internal::data& data();
48 friend class codec::encoder;
49 friend class codec::decoder;
57 class value :
public internal::value_base,
private internal::comparable<value> {
60 template<
class T,
class U=
void>
struct assignable :
61 public internal::enable_if<codec::is_encodable<T>::value, U> {};
62 template<
class U>
struct assignable<value, U> {};
66 PN_CPP_EXTERN value();
70 PN_CPP_EXTERN value(
const value&);
71 PN_CPP_EXTERN value& operator=(
const value&);
72 #if PN_CPP_HAS_RVALUE_REFERENCES 73 PN_CPP_EXTERN value(value&&);
74 PN_CPP_EXTERN value& operator=(value&&);
79 template <
class T>
value(
const T& x,
typename assignable<T>::type* = 0) { *
this = x; }
82 template <
class T>
typename assignable<T, value&>::type
operator=(
const T& x) {
89 PN_CPP_EXTERN
type_id type()
const;
92 PN_CPP_EXTERN
bool empty()
const;
95 PN_CPP_EXTERN
void clear();
98 template<
class T> PN_CPP_DEPRECATED(
"Use 'proton::get'")
void get(T &t)
const;
99 template<
class T> PN_CPP_DEPRECATED(
"Use 'proton::get'") T
get()
const;
103 friend PN_CPP_EXTERN
void swap(value&, value&);
107 friend PN_CPP_EXTERN
bool operator==(
const value& x,
const value& y);
108 friend PN_CPP_EXTERN
bool operator<(
const value& x,
const value& y);
115 friend PN_CPP_EXTERN std::ostream&
operator<<(std::ostream&,
const value&);
120 void reset(pn_data_t* d = 0);
126 template<
class T> T
get(
const value& v) { T x;
get(v, x);
return x; }
136 template<
class T,
class U>
inline void get(
const U& u, T& x) {
const value v(u);
get(v, x); }
150 if (type_id_is_scalar(v.
type())) {
152 x = internal::coerce<T>(s);
167 template<
class T>
void value::get(T &x)
const { x = proton::get<T>(*this); }
168 template<
class T> T
value::get()
const {
return proton::get<T>(*this); }
173 #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:126
The null type, contains no data.
Definition: type_id.hpp:38
void get< null >(const value &v, null &)
Special case for get<null>(), just checks that value contains NULL.
Definition: value.hpp:159
void swap(map< K, T > &, map< K, T > &)
Swap proton::map instances.
Unsettled API - A stream-like encoder from C++ values to AMQP bytes.
Definition: encoder.hpp:50
assignable< T, value & >::type operator=(const T &x)
Assign from any allowed type T.
Definition: value.hpp:82
value(const T &x, typename assignable< T >::type *=0)
Copy from any allowed type T.
Definition: value.hpp:79
type_id type() const
Get the type ID for the current value.
std::string to_string(const scalar_base &x)
Return a readable string representation of x for display purposes.
type_id
An identifier for AMQP types.
Definition: type_id.hpp:37
Forward declarations for Proton types used to represent AMQP types.
Unsettled API - A stream-like decoder from AMQP bytes to C++ values.
T coerce(const annotation_key &x)
Get the binary value or throw conversion_error.
Definition: annotation_key.hpp:83
A holder for any AMQP value, simple or complex.
Definition: value.hpp:57
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...
Unsettled API - A stream-like encoder from C++ values to AMQP bytes.
The main Proton namespace.
Definition: annotation_key.hpp:33
A holder for an instance of any scalar AMQP type.
Unsettled API - A stream-like decoder from AMQP bytes to C++ values.
Definition: decoder.hpp:56