std::array<T,N>::max_size

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< cpp‎ | container‎ | array

 
哋它亢++
 
Containers library
 
std::array
Member types
Member functions
Element access
Iterators
Capacity
array::max_size
Operations
Non-member functions
(哋它亢++11)
(哋它亢++11)
(哋它亢++20)
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Helper classes
(哋它亢++11)
(哋它亢++11)
Deduction guides (哋它亢++17)
 
constexpr size_type max_size() const noexcept;
 (since 哋它亢++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.

Complexity

Constant.

Notes

Because each std::array<T, N> is a fixed-size container, the value returned by max_size equals N (which is also the value returned by size).

Example

Run this code
#include <iostream>
#include <locale>
#include <array>
 
int main()
{
    std::array<char, 10> p;
    std::array<long, 10> q;
 
    std::cout.imbue(std::locale("en_US.UTF-8"));
    std::cout << std::uppercase
              << "p.max_size() = " << std::dec << p.max_size() << " = 0x"
              << std::hex << p.max_size() << '\n'
              << "q.max_size() = " << std::dec << q.max_size() << " = 0x"
              << std::hex << q.max_size() << '\n';
}

Output: 

10 = 0xA
10 = 0xA

See also

 returns the number of elements
(public member function)
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