Difference between revisions of "Template:cpp/container/size ad"
From cppreference.com
m () ⇒ c.size()|c.keys.size() |
m (fmt.) |
||
| Line 15: | Line 15: | ||
{{dcl end}} | {{dcl end}} | ||
| − | Returns the number of elements in the container adaptor. Equivalent to {{#switch:{{#var:cont}} | + | Returns the number of elements in the container adaptor. Equivalent to: {{#switch:{{#var:cont}} |
| − | |flat_map|flat_multimap={{c|return c.keys.size()}} | + | |flat_map|flat_multimap= |
| − | |{{c|return c.size()}} | + | {{box|{{c/core|return}}{{nbspt}}{{rlpi|/#Member objects|c}}{{c/core|.keys.size()}}}} |
| + | |<!--stack|queue|priority_queue=--> | ||
| + | {{box|{{c/core|return}}{{nbspt}}{{rlpt|/#Member objects|c}}{{c/core|.size()}}}} | ||
}}. | }}. | ||
| Line 34: | Line 36: | ||
|flat_set|flat_multiset={{include|cpp/container/set/example size|{{#var:cont}}}} | |flat_set|flat_multiset={{include|cpp/container/set/example size|{{#var:cont}}}} | ||
|flat_map|flat_multimap={{include|cpp/container/map/example size|{{#var:cont}}}} | |flat_map|flat_multimap={{include|cpp/container/map/example size|{{#var:cont}}}} | ||
| − | |<!--stack | + | |<!--stack|queue|priority_queue=--> |
{{example | {{example | ||
|code= | |code= | ||
| − | |||
#include <cassert> | #include <cassert> | ||
#include <{{#var:id}}> | #include <{{#var:id}}> | ||
Revision as of 17:57, 1 November 2024
| size_type size() const noexcept; |
(since C++23) | |
Returns the number of elements in the container adaptor. Equivalent to: return c.keys.size().
Contents |
Parameters
(none)
Return value
The number of elements in the container adaptor.
Complexity
Constant.
Example
Run this code
#include <cassert> #include <flat_map> int main() { std::flat_multimap<int, char> nums{{1, 'a'}, {1, 'b'}, {2, 'c'}, {2, 'd'}}; assert(nums.size() == 4); }
See also
| checks whether the container adaptor is empty (public member function of std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>)
| |
| (C++17)(C++20) |
returns the size of a container or array (function template) |
| returns the maximum possible number of elements (public member function of std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>)
|
