(C++17) | ||||
| Sequence | ||||
(C++11) | ||||
(C++26) | ||||
(C++26) | ||||
(C++11) | ||||
| Associative | ||||
| Unordered associative | ||||
(C++11) | ||||
(C++11) | ||||
(C++11) | ||||
(C++11) | ||||
| Adaptors | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
| Views | ||||
(C++20) | ||||
(C++23) | ||||
| Tables | ||||
| Iterator invalidation | ||||
| Member function table | ||||
| Non-member function table |
constexprbool empty()constnoexcept; | (since C++26) | |
Checks if the container has no elements.
Contents |
true if the container is empty,false otherwise.
Constant.
#include <cassert>#include <inplace_vector> int main(){std::inplace_vector<char,8> v;assert(v.empty()); v.push_back('_');assert(not v.empty());}
| returns the number of elements (public member function)[edit] | |
(C++17) | checks whether the container is empty (function template)[edit] |
