lunchbox::Any Class Reference

A class which can hold instances of any type. More...

#include <any.h>

Collaboration diagram for lunchbox::Any:

Public Member Functions
Construction/Destruction
	Any ()
	Construct a new, empty Any. More...
template<typename ValueType >
	Any (const ValueType &value)
	Construct a new Any with the given value. More...
	Any (const Any &other)
	Copy-construct a new Any with copying content of other. More...
	~Any ()
	Destruct this Any. More...
Modifiers
Any &	swap (Any &rhs)
	Exchange the content of this and rhs. More...
template<typename ValueType >
Any &	operator= (const ValueType &rhs)
	Assign a new value to this Any. More...
Any &	operator= (Any rhs)
	Exchange the content of this and rhs. More...
Queries
bool	empty () const
const std::type_info &	type () const
bool	operator== (const Any &rhs) const
bool	operator!= (const Any &rhs) const

Friends
class	boost::serialization::access
template<typename ValueType >
ValueType *	any_cast (Any *)
	Retrieve the value stored in an Any including type checking. More...
template<typename ValueType >
ValueType *	unsafe_any_cast (Any *)
	Retrieve the value stored in an Any without type checking. More...

Detailed Description

A class which can hold instances of any type.

This class is based on boost.any with the extension to support serialization if the ValueType supports boost.serialization.

Example:

/* Copyright (c) 2012, Daniel Nachbaur <danielnachbaur@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "test.h"

#include <lunchbox/any.h>

int main( int, char** )
{
    lunchbox::Any any;
    lunchbox::Any otherAny;
    TEST( any.empty( ));
    TEST( any.type() == typeid(void));
    TEST( any == otherAny );

    any = 5;
    otherAny = any;
    TEST( lunchbox::any_cast< int >( any ) == 5 );
    TEST( any.type() == typeid(int));
    TEST( any == otherAny );

    any = 42;
    otherAny = 42;
    TEST( lunchbox::any_cast< int >( any ) == 42 );
    TEST( any == otherAny );

    any = std::string( "blablub" );
    TEST( lunchbox::any_cast< std::string >( any ) == "blablub" );
    TEST( any.type() == typeid(std::string));
    TEST( any != otherAny );

    try { TEST( lunchbox::any_cast< int >( any ) != 42 ); }
    catch( const lunchbox::bad_any_cast& ) {}

    return EXIT_SUCCESS;
}

Definition at line 67 of file any.h.

Constructor & Destructor Documentation

lunchbox::Any::Any

(

)

Construct a new, empty Any.

Version

1.5.0

Referenced by operator=().

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template<typename ValueType >

lunchbox::Any::Any ( const ValueType &  value )

inline

Construct a new Any with the given value.

Version

1.5.0

Definition at line 77 of file any.h.

lunchbox::Any::Any

(

const Any &

other

)

Copy-construct a new Any with copying content of other.

Version

1.5.0

lunchbox::Any::~Any

(

)

Destruct this Any.

Version

1.5.0

Member Function Documentation

bool lunchbox::Any::empty

(

)

const

Returns

true if this Any is not holding a value.

Version

1.5.0

bool lunchbox::Any::operator!= ( const Any &  rhs ) const

inline

Returns

true if the value from this and rhs are not equal.

Version

1.5.0

Definition at line 127 of file any.h.

template<typename ValueType >

Any& lunchbox::Any::operator= ( const ValueType &  rhs )

inline

Assign a new value to this Any.

Version

1.5.0

Definition at line 95 of file any.h.

References Any().

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Any& lunchbox::Any::operator=

(

Any

rhs

)

Exchange the content of this and rhs.

Version

1.5.0

bool lunchbox::Any::operator==

(

const Any &

rhs

)

const

Returns

true if this and rhs are empty or if their values are equal.

Version

1.5.0

Any& lunchbox::Any::swap

(

Any &

rhs

)

Exchange the content of this and rhs.

Version

1.5.0

const std::type_info& lunchbox::Any::type

(

)

const

Returns

the typeid of the contained value if non-empty, otherwise typeid(void).

Version

1.5.0

Referenced by lunchbox::any_cast().

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Friends And Related Function Documentation

template<typename ValueType >

ValueType* any_cast ( Any *  operand )

friend

Retrieve the value stored in an Any including type checking.

Returns

the value stored in the given Any, 0 if types are not matching

Version

1.5.0

Definition at line 235 of file any.h.

template<typename ValueType >

ValueType* unsafe_any_cast ( Any *  operand )

friend

Retrieve the value stored in an Any without type checking.

Returns

the value stored in the given Any

Version

1.5.0

Definition at line 301 of file any.h.

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

• any.h