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| Category: containers | | Component type: concept |
Description
A Simple Associative Container is an AssociativeContainer where elements are their own keys. A key in a Simple Associative Container is not associated with any additional value.
Refinement of
AssociativeContainer
Associated types
None, except for those described in the AssociativeContainer requirements. Simple Associative Container, however, introduces two new type restrictions.
| Key type | X::key_type | The type of the key associated with X::value_type. The types key_type and value_type must be the same type. |
| Iterator | X::iterator | The type of iterator used to iterate through a Simple Associative Container's elements. The types X::iterator and X::const_iterator must be the same type. That is, a Simple Associative Container does not provide mutable iterators. [1] |
Notation
X | A type that is a model of Simple Associative Container |
a | Object of type X |
k | Object of type X::key_type |
p, q | Object of type X::iterator |
Definitions
Valid expressions
None, except for those defined in the AssociativeContainer requirements.
Expression semantics
Complexity guarantees
Invariants
| Immutability of Elements | Every element of a Simple Associative Container is immutable. Objects may be inserted and erased, but not modified. [1] |
Models
Notes
[1] This is a consequence of the Immutability of Keys invariant of AssociativeContainer. Keys may never be modified; values in a Simple Associative Container are themselves keys, so it immediately follows that values in a Simple Associative Container may not be modified.
See also
AssociativeContainer, PairAssociativeContainer
