Category: containers | Component type: concept |
Iterators into a Forward Container satisfy the forward iterator requirements; consequently, Forward Containers support multipass algorithms and allow multiple iterators into the same container to be active at the same time.
X | A type that is a model of Forward Container |
a, b | Object of type X |
T | The value type of X |
Name | Expression | Type requirements | Return type |
---|---|---|---|
Equality | a == b | T is EqualityComparable | Convertible to bool |
Inequality | a != b | T is EqualityComparable | Convertible to bool |
Less | a < b | T is LessThanComparable | Convertible to bool |
Greater | a > b | T is LessThanComparable | Convertible to bool |
Less or equal | a <= b | T is LessThanComparable | Convertible to bool |
Greater or equal | a >= b | T is LessThanComparable | Convertible to bool |
Name | Expression | Precondition | Semantics | Postcondition |
---|---|---|---|---|
Equality | a == b | Returns true if a.size() == b.size() and if each element of a compares equal to the corresponding element of b. Otherwise returns false. | ||
Less | a < b | Equivalent to lexicographical_compare(a,b) |
Ordering | Two different iterations through a forward container will access its elements in the same order, providing that there have been no intervening mutative operations. |
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