Difference between revisions of "Template:cpp/container/size"
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Andreas Krug (Talk | contribs) m (fmt) |
m (+flat_(+) adaptors, examples adjustment: WIP.) |
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{{cpp/container/{{{1|}}}/navbar}} | {{cpp/container/{{{1|}}}/navbar}} | ||
{{dcl begin}} | {{dcl begin}} | ||
| − | {{#switch:{{{1|}}}|array= | + | {{#switch:{{{1|}}} |
| + | |array= | ||
{{dcl|since=c++11| | {{dcl|since=c++11| | ||
constexpr size_type size() const noexcept; | constexpr size_type size() const noexcept; | ||
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|since3=c++20|dcl3= | |since3=c++20|dcl3= | ||
constexpr size_type size() const noexcept; | constexpr size_type size() const noexcept; | ||
| + | }} | ||
| + | |flat_set|flat_multiset|flat_map|flat_multimap= | ||
| + | {{dcl|since=c++23| | ||
| + | size_type size() const noexcept; | ||
}} | }} | ||
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===Example=== | ===Example=== | ||
| − | {{include|cpp/container/{{{1|}}}/ | + | {{#switch:{{{1|}}} |
| + | |set|multiset|unordered_set|unordered_multiset|flat_set|flat_multiset | ||
| + | ={{include|cpp/container/set/example size|{{{1|}}}}} | ||
| + | |map|multimap|unordered_map|unordered_multimap|flat_map|flat_multimap | ||
| + | ={{include|cpp/container/map/example size|{{{1|}}}}} | ||
| + | |{{include|cpp/container/{{{1|}}}/example size}} | ||
| + | }} | ||
===See also=== | ===See also=== | ||
Revision as of 20:29, 25 December 2023
| size_type size() const noexcept; |
(since {std}) | |
Returns the number of elements in the container, i.e. std::distance(begin(), end()).
Contents |
Parameters
(none)
Return value
The number of elements in the container.
Complexity
Constant.
Example
| Templated content. The link is cpp/container/<PP>/example size |
See also
| checks whether the container is empty (public member function of std::{{{1}}})
| |
| returns the maximum possible number of elements (public member function of std::{{{1}}})
| |
| (C++17)(C++20) |
returns the size of a container or array (function template) |
