Difference between revisions of "cpp/named req/Container"
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A {{tt|Container}} is an object used to store other objects and taking care of the management of the memory used by the objects it contains. | A {{tt|Container}} is an object used to store other objects and taking care of the management of the memory used by the objects it contains. | ||
Revision as of 12:26, 15 June 2012
Template:cpp/concept/title Template:cpp/concept/navbar
A Container is an object used to store other objects and taking care of the management of the memory used by the objects it contains.
Contents |
Requirements
-
CContainer type -
TElement type -
a,bObjects of typeC
Types
| name | type | notes |
|---|---|---|
value_type |
T | Template:concept |
reference |
lvalue of T | |
const_reference |
const lvalue of T | |
iterator |
iterator pointing to T | Template:concept convertible to const_iterator
|
const_iterator |
const iterator pointing to T | Template:concept |
difference_type |
signed integer | must be the same as iterator_traits::difference_type for iterator and const_iterator
|
size_type |
unsigned integer | large enough to represent all positive values of difference_type
|
Methods and operators
| expression | return type | semantics | conditions | complexity | |
|---|---|---|---|---|---|
| C(); | C | Creates an empty container | Post: u.empty() == true | Constant | |
| C(a) | C | Create a copy of a |
Pre: T must be Template:concept Post: a == X(a) |
Linear | |
| a = b | C& | All elements of a are destroyed or move assigned to elements of b |
Post: a == b | Linear | |
| (&a)->~C() | void | Destroy all elements and free all memory | Linear | ||
| a.begin() | (const_)iterator | Iterator to the first element | Constant | ||
| a.end() | (const_)iterator | Iterator to one passed the last element | Constant | ||
| a.cbegin()(since C++11) | const_iterator | const_cast<const C&>(a).begin() | Constant | ||
| a.cend()(since C++11) | const_iterator | const_cast<const C&>(a).end() | Constant | ||
| a == b | convertible to bool | Makes C Template:concept | Pre: T must be Template:concept | Linear | |
| a != b | convertible to bool | !(a==b) | Linear | ||
| a.swap(b) | void | exchanges the values of a and b | Constant[1] | ||
| swap(a,b) | void | a.swap(b) | Constant[1] | ||
| a.size() | size_type | distance(a.begin(),a.end()) | Constant | ||
| a.max_size() | size_type | b.size() where b is the largest possible container | Constant | ||
| a.empty() | convertible to bool | a.begin() == a.end() | Constant | ||
| notes | |||||
| |||||
Other concepts
- C
- T
