Class Specialization
Tristate Holder
Holder that can be empty, dependent, or owner.
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Tristate Holder | |||||||
Parameters
Type of the managed object. |
Specialization of
Metafunctions
| Reference type. (Holder) | |
| The spec of a class. (Holder) | |
| Type of the items in the container. (Holder) |
Functions
| Assigns one object to another object. (Holder) | |
| Assigns value to item. (Holder) | |
| Resets an object. (Holder) | |
| Makes an object to owner of its content. (Holder) | |
| Test whether object depends on other objects. (Holder) | |
| Makes an object independent from other objects. (Holder) | |
| Test a container for being empty. (Holder) | |
| Assigns value to item. (Holder) | |
| Makes holder dependent. (Holder) | |
| Reference to the value. (Holder) |
Remarks
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 .
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