Spec
TristateHolderHolder that can be empty, dependent, or owner.
Holder that can be empty, dependent, or owner.
Extends | Holder |
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All Extended | Holder |
Defined in | <seqan/basic.h> |
Signature |
template <typename TValue>
class Holder<TValue, Tristate>;
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Template Parameters
TValue |
Type of the managed object. |
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Interface Function Overview
Interface Functions Inherited From Holder
Interface Metafunction Overview
Interface Metafunctions Inherited From Holder
Detailed Description
A tristate holder A that holds an object B has one of the following states:
- owner: A is the owner of B. If A is destroyed, B will be destroyed automatically.
- dependent: A depends on B. B should not be destroyed as long as A is used.
- empty: there is currently no object reference stored in the holder A.
The state of the holder can be determined by empty and dependent.
If a holder object is in owner state when destructed, the owned object is destructed as well.