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std::char_traits<CharT>::copy

static char_type* copy( char_type* dest, const char_type* src, std::size_t count );
(until C++20)
static constexpr char_type* copy( char_type* dest, const char_type* src, std::size_t count );
(since C++20)

Copies count characters from the character string pointed to by src to the character string pointed to by dest.

Formally, for each i in [0, count), performs assign(src[i], dest[i]).

The behavior is undefined if copied character ranges overlap, i.e. src is in [dest, dest + count).

Parameters

dest - pointer to a character string to copy to
src - pointer to a character string to copy from
count - the number of characters to copy

Return value

dest.

Exceptions

Throws nothing.

Complexity

Linear.

See also

[static]
assigns a character
(public static member function)

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https://en.cppreference.com/w/cpp/string/char_traits/copy