OFrvalue< T > Struct Template Reference

A helper class to 'tag' objects as rvalues to help DCMTK's move emulation employed on pre C++11 compilers. More...

Inheritance diagram for OFrvalue< T >:

Detailed Description

template<typename T>
struct OFrvalue< T >

A helper class to 'tag' objects as rvalues to help DCMTK's move emulation employed on pre C++11 compilers.

Template Parameters

T	the base type an rvalue should be create of.

OFrvalue wraps the type T inside a zero-overhead object employing T's move constructor when possible.

Note

When C++11 support is available, OFrvalue<T> will simply be a type alias for T, since a C++11 compiler handles rvalue reference conversions natively.

Example

This example describes how to move an object of type OFunique_ptr out of a function by using OFrvalue.

OFrvalue<OFunique_ptr<DcmDataset> > getDataset()
{
  return OFunique_ptr<DcmDataset>( new DcmDataset );
}
. . .
OFunique_ptr<DcmDataset> pDataset = getDataset();

Warning

Some compilers might require you to use the following code instead, as older versions of the C++ standard allowed the compiler to use the copy constructor for binding an rvalue to an lvalue reference. Use this code template instead to achieve maximum portability:

OFrvalue<OFunique_ptr<DcmDataset> > getDataset()
{
  OFunique_ptr<DcmDataset> pDataset( new DcmDataset );
  return OFmove( pDataset );
}

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

• ofstd/include/dcmtk/ofstd/ofutil.h