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#include <bsltf_degeneratefunctor.h>
Public Member Functions | |
DegenerateFunctor (const DegenerateFunctor &original) | |
DegenerateFunctor (bslmf::MovableRef< DegenerateFunctor > original) | |
void | exchangeValues (DegenerateFunctor *other) |
Static Public Member Functions | |
static DegenerateFunctor | cloneBaseObject (const FUNCTOR &base) |
This test class template adapts a CopyConstructible class to offer a minimal or outright obstructive interface for testing generic code. To support the testing of standard containers, this adapter will be MoveConstructible, CopyConstructible, and nothrow Destructible as long as the adapted FUNCTOR
satisfies the same requirements. This class will further be Swappable if (the template parameter) ENABLE_SWAP
is true
and the adapted FUNCTOR
is MoveConstructible. The (inherited) function call operator should be the only other available method, no other operation (e.g., the unary address-of operator) should be usable. We take advantage of the fact that defining a copy constructor inhibits the generation of a default constructor, and that constructors are not inherited by a derived class. DegenerateFunctor
objects must be created through either the copy constructor, or by wrapping a FUNCTOR
object through the static factory method of this class, cloneBaseObject
.
See Component bsltf_degeneratefunctor
bsltf::DegenerateFunctor< FUNCTOR, ENABLE_SWAP >::DegenerateFunctor | ( | const DegenerateFunctor< FUNCTOR, ENABLE_SWAP > & | original | ) |
Create a DegenerateFunctor
having the same value the specified original
.
bsltf::DegenerateFunctor< FUNCTOR, ENABLE_SWAP >::DegenerateFunctor | ( | bslmf::MovableRef< DegenerateFunctor< FUNCTOR, ENABLE_SWAP > > | original | ) |
Create a DegenerateFunctor
having the same value the specified original, and leave 'original
in an unspecified (but valid) state.
static DegenerateFunctor bsltf::DegenerateFunctor< FUNCTOR, ENABLE_SWAP >::cloneBaseObject | ( | const FUNCTOR & | base | ) | [static] |
Create a DegenerateFunctor object wrapping a copy of the specified base
. Note that this method is supplied so that the only publicly accessible constructor is the copy constructor.
void bsltf::DegenerateFunctor< FUNCTOR, ENABLE_SWAP >::exchangeValues | ( | DegenerateFunctor< FUNCTOR, ENABLE_SWAP > * | other | ) |
< Expose the overloaded function call operator from the parameterizing class FUNCTOR
. Swap the wrapped FUNCTOR
object, by move-constructing a temporary object from the specified *other
, then alternately destroying and in-place move-constructing new values for each of *other
and *this
. Note that this function is deliberately not named swap
as some "clever" template libraries may try to call a member-swap function when they can find it, and ADL-swap is not available. Also note that this overload is needed only so that the ADL-enabling free-function swap
can be defined, as the native std library std::swap
function will not accept this class (with its deliberate degenerate nature) on AIX, or on Windows with Visual C++ prior to VC2010.