size_type max_size() const; | (since C++11) |
Returns the maximum number of elements the container is able to hold due to system or library implementation limitations, i.e. std::distance(begin(), end())
for the largest container.
Parameters
(none).
Return value
Maximum number of elements.
Exceptions
noexcept
specification: noexcept
Complexity
Constant.
Notes
This value is typically equal to std::numeric_limits<size_type>::max()
, and reflects the theoretical limit on the size of the container. At runtime, the size of the container may be limited to a value smaller than max_size()
by the amount of RAM available.
Example
#include <iostream> #include <unordered_multimap> int main() { std::unordered_multimap<char,char> s; std::cout << "Maximum size of a 'unordered_multimap' is " << s.max_size() << "\n"; }
Possible output:
Maximum size of a 'unordered_multimap' is 18446744073709551615
See also
returns the number of elements (public member function) |
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