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

 

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std::array

Member types
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Element access array::at array::operator[]    array::front array::back array::data Operations array::fill array::swap	Iterators array::beginarray::cbegin array::endarray::cend array::rbeginarray::crbegin    array::rendarray::crend	Capacity array::empty array::size array::max_size
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operator==operator<=> (C++20) get(std::array) swap(std::array) to_array (C++20)	operator|=operator<operator>operator<=operator>= (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
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void fill( const T& value );		(since C++11) (constexpr since C++20)

Assigns the value to all elements in the container.

Parameters

value

-

the value to assign to the elements

Return value

(none)

Complexity

Linear in the size of the container.

Example

Run this code

#include <array>
#include <cstddef>
#include <iostream>
 
int main()
{
    constexpr std::size_t xy = 4;
 
    using Cell = std::array<unsigned char, 8>;
 
    std::array<Cell, xy * xy> board;
 
    board.fill({0xE2, 0x96, 0x84, 0xE2, 0x96, 0x80, 0}); / "▄▀";
 
    for (std::size_t count{}; Cell c : board)
        std::cout << c.data() << ((++count % xy) ? "" : "\n");
}

Possible output:

▄▀▄▀▄▀▄▀
▄▀▄▀▄▀▄▀
▄▀▄▀▄▀▄▀
▄▀▄▀▄▀▄▀

See also

fill	copy-assigns the given value to every element in a range (function template)
fill_n	copy-assigns the given value to N elements in a range (function template)
ranges::fill (C++20)	assigns a range of elements a certain value (algorithm function object)

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