[#BloombergLP-bsltf-CopyMoveTracker]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsltf.adoc[bsltf]::CopyMoveTracker
:relfileprefix: ../../
:mrdocs:

Type that tracks whether it has been copied into, moved into, or moved from.

== Synopsis

Declared in `<bsltf_copymovetracker.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class CopyMoveTracker;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bsltf/CopyMoveTracker/2constructor-03.adoc[`CopyMoveTracker`]         [.small]#[constructor]#
| Constructors
| xref:BloombergLP/bsltf/CopyMoveTracker/operator_assign-03.adoc[`operator=`] 
| Assignment operators
| xref:BloombergLP/bsltf/CopyMoveTracker/copyMoveState.adoc[`copyMoveState`] 
| Return this object's state.
| xref:BloombergLP/bsltf/CopyMoveTracker/hasUnknownCopyMoveState.adoc[`hasUnknownCopyMoveState`] 
| Return `true` if this object's state includes the `e_UNKNOWN` bit. This attribute can be `true` only if `setCopyMoveState` was called with an enumerator value that includes the `e_UNKNOWN` bit.
| xref:BloombergLP/bsltf/CopyMoveTracker/isCopiedConstInto.adoc[`isCopiedConstInto`] 
| Return `true` if this object's state includes the `e_COPIED_CONST_INTO` bits but not `e_UNKNOWN`. This attribute is `true` if this object was copy constructed or copy assigned from a `const` lvalue (or, in C++03, from a prvalue).
| xref:BloombergLP/bsltf/CopyMoveTracker/isCopiedInto.adoc[`isCopiedInto`] 
| Return `true` if this object's state includes the `e_COPIED_INTO` bit but not `e_UNKNOWN`. This attribute is `true` if either `isCopiedConstInto()` or `isCopiedNonconstInto()` is true.
| xref:BloombergLP/bsltf/CopyMoveTracker/isCopiedNonconstInto.adoc[`isCopiedNonconstInto`] 
| Return `true` if this object's state includes the `e_COPIED_NONCONST_INTO` bits but not `e_UNKNOWN`. This attribute is `true` if this object was copy constructed or copy assigned from a non‐`const` lvalue.
| xref:BloombergLP/bsltf/CopyMoveTracker/isMovedFrom.adoc[`isMovedFrom`] 
| Return `true` if this object's state includes the `e_MOVED_FROM` bit but not `e_UNKNOWN`. This attribute is `true` if this object was the argument of the move constructor or the rhs of the move assignment operator and was not subsequently modified.
| xref:BloombergLP/bsltf/CopyMoveTracker/isMovedInto.adoc[`isMovedInto`] 
| Return `true` if this object's state includes the `e_MOVED_INTO` bit but not `e_UNKNOWN`. This attribute is `true` if this object was move constructed or was the lhs the of move assignment operator.
| xref:BloombergLP/bsltf/CopyMoveTracker/isOriginal.adoc[`isOriginal`] 
| Return `true` if this object is not in a copied‐into, moved‐into, or unknown state. This attribute is `true` if this object was default constructed or reset and not subsequently assigned to.
| xref:BloombergLP/bsltf/CopyMoveTracker/resetCopyMoveState.adoc[`resetCopyMoveState`] 
| Set this object to the `e_NOT_COPIED_OR_MOVE` state.
| xref:BloombergLP/bsltf/CopyMoveTracker/setCopyMoveState.adoc[`setCopyMoveState`] 
| Set this object to the specified `state`, which might be the bitwise OR of `e_MOVED_FROM` and one of the other enumerator values. The behavior is undefined unless `CopyMoveState::isValid(state)` is `true`.
| xref:BloombergLP/bsltf/CopyMoveTracker/swapCopyMoveStates.adoc[`swapCopyMoveStates`] 
| Set the state of both the specified `this` and `b` objects to the bitwise OR of `e_MOVED_INTO` and `e_MOVED_FROM`.
|===


== Friends

[cols="1,4"]
|===
| Name| Description
| `xref:BloombergLP/bsltf/setCopyMoveState-0e.adoc[BloombergLP::bsltf::setCopyMoveState]`
| Set the object at the specified `tracker` address to the specified `state`. This function is an ADL customization point used by `CopyMoveState::set(obj, state)`. The behavior is undefined unless `CopyMoveState::isValid(state)` is `true`.
| `xref:BloombergLP/bsltf/copyMoveState-00.adoc[BloombergLP::bsltf::copyMoveState]`
| Return the state of the specified `tracker`. This function is an ADL customization point used by `CopyMoveState::get(obj)`.
| `xref:BloombergLP/bsltf/operator_not_eq-0f0.adoc[BloombergLP::bsltf::operator!=]`
| Return `false`; the copy/move state is _not_ a salient attribute, so all `CopyMoveTracker` objects compare equal. Note that this operator is called implicitly if a client class defines a defaulted comparison operator (C++20), but will not be selected by overload resolution for a derived class having no comparison operator.
| `xref:BloombergLP/bsltf/operator_eq-0844.adoc[BloombergLP::bsltf::operator==]`
| Return `true`; the copy/move state is _not_ a salient attribute, so all `CopyMoveTracker` objects compare equal. Note that this operator is called implicitly if a client class defines a defaulted comparison operator (C++20), but will not be selected by overload resolution for a derived class having no comparison operator.
|===


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