_value.h File Reference

#include <algorithm>
#include <typeinfo>
#include <cassert>

Go to the source code of this file.

Classes
class	value_store_type< T >
class	value
	Abstraction of the concept of a generic value. More...
struct	value::contentholder
class	value::holder< T >
class	bad_value_cast

Functions
template<typename ValueType >
ValueType *	value_cast (value *v)
template<typename ValueType >
const ValueType *	value_cast (const value *v)
template<typename ValueType >
ValueType	value_cast (const value &v)

Function Documentation

template<typename ValueType >

ValueType* value_cast

(

value *

v

)

Returns a pointer to the desired value type if the value_type and the internal binary format agree (mediated by using the value_store_type class), otherwise it returns 0.

See Also

value_store_type

Definition at line 200 of file _value.h.

References value::content, value::holder< T >::obj, and value::type().

Referenced by value_cast().

template<typename ValueType >

const ValueType* value_cast

(

const value *

v

)

Same as above except tweaked to allow const cast (possibly for purposes involving type agreement... if const impacts a typeid call I do not know...)

Definition at line 213 of file _value.h.

References value_cast().

template<typename ValueType >

ValueType value_cast

(

const value &

v

)

Extract a copy of the internal object and will throw a bad_value_cast exception if the types do not agree.

Note

I'm not sure why boost::any didn't use a reference here... there must be a reason...

See Also

bad_value_cast

Definition at line 226 of file _value.h.

References value_cast().