A holder for an instance of any scalar AMQP type. More...

#include <scalar.hpp>

Inheritance diagram for scalar:

Public Member Functions
	scalar ()=default
	Create an empty scalar.

template<class T >
	scalar (const T &x)
	Construct from any scalar type.

template<class T >
scalar &	operator= (const T &x)
	Assign from any scalar type.

void	clear ()
	Clear the scalar, making it empty().

Public Member Functions inherited from scalar_base
type_id	type () const
	AMQP type of data stored in the scalar.

bool	empty () const
	True if there is no value, i.e. type() == NULL_TYPE.

Related Functions
(Note that these are not member functions.)
template<class T >
T	get (const scalar &s)
	Get a contained value of type T. More...

template<class T >
T	coerce (const scalar &x)
	Coerce the contained value to type T. More...

template<class T >
T	coerce (scalar &x)
	Coerce the contained value to type T. More...

Detailed Description

A holder for an instance of any scalar AMQP type.

Friends And Related Function Documentation

T get ( const scalar & s )

For example:

 uint64_t i = get<uint64_t>(x)

This will succeed if and only if x contains a uint64_t value.

Exceptions

conversion_error if contained value is not of type T.

T coerce ( const scalar & x )

For example:

 uint64_t i = coerce<uint64_t>(x)

This will succeed if x contains any numeric value, but may lose precision if it contains a float or double value.

Exceptions

conversion_error if the value cannot be converted to T according to std::is_convertible

T coerce ( scalar & x )

For example:

 uint64_t i = coerce<uint64_t>(x)

This will succeed if x contains any numeric value, but may lose precision if it contains a float or double value.

Exceptions

conversion_error if the value cannot be converted to T according to std::is_convertible

The documentation for this class was generated from the following file: