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std::fill_n

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< cpp‎ | algorithm
 
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fill_n
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Defined in header <algorithm>
(1)
template< class OutputIt, class Size, class T >
OutputIt fill_n( OutputIt first, Size count, const T& value );
 (constexpr since C++20)
(until C++26)
template< class OutputIt, class Size,

          class T = typename std::iterator_traits
                        <OutputIt>::value_type >
constexpr OutputIt fill_n( OutputIt first, Size count,

                           const T& value );
 (since C++26)
(2)
template< class ExecutionPolicy,

          class ForwardIt, class Size, class T >
ForwardIt fill_n( ExecutionPolicy&& policy,

                  ForwardIt first, Size count, const T& value );
 (since C++17)
(until C++26)
template< class ExecutionPolicy,

          class ForwardIt, class Size,
          class T = typename std::iterator_traits
                        <OutputIt>::value_type >
ForwardIt fill_n( ExecutionPolicy&& policy,

                  ForwardIt first, Size count, const T& value );
 (since C++26)
1) Assigns the given value to the first count elements in the range beginning at first if count > 0. Does nothing otherwise.
2) Same as (1), but executed according to policy.
This overload participates in overload resolution only if all following conditions are satisfied: