OFdefault_optional_traits< T > Class Template Reference

Default storage traits of OFoptional<T>. More...

Detailed Description

template<typename T>
class OFdefault_optional_traits< T >

Default storage traits of OFoptional<T>.

OFdefault_optional_traits manages the state and storage of the contained object in a portable manner. You may use this class as base when defining custom traits for a specific type T, so you won't have to re-implement this functionality entirely.

Template Parameters

T	the content type of the respective OFoptional instance.

See also

OFoptional

OFoptional_traits

Example

This example shows how to override the is_default_constructible attribute of OFoptional_traits for the custom class Test.

// Note: Test's default constructor is private
//   which leads to errors when being used within
//   OFoptional, since a default constructor exists
//   but can't be accessed.
class Test
{
    Test() {}
public:
    static OFoptional<T> instance();
         .
         .
         .
};
 
// Override OFoptional's behavior to fix this problem
template<>
struct OFoptional_traits<Test>
: OFdefault_optional_traits<Test> // derived from default traits
{
    // Tell OFoptional that it can't default-construct
    // a Test object.
    typedef OFfalse_type is_default_constructible;
};

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

• ofstd/include/dcmtk/ofstd/ofoption.h