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std::basic_string_view<CharT,Traits>::copy

size_type copy( CharT* dest, size_type count, size_type pos = 0 ) const;
(since C++17)
(until C++20)
constexpr size_type copy( CharT* dest, size_type count,
                          size_type pos = 0 ) const;
(since C++20)

Copies the substring [pos, pos + rcount) to the character array pointed to by dest, where rcount is the smaller of count and size() - pos.

Equivalent to Traits::copy(dest, data() + pos, rcount).

Parameters

dest - pointer to the destination character string
pos - position of the first character
count - requested substring length

Return value

Number of characters copied.

Exceptions

std::out_of_range if pos > size().

Complexity

Linear in rcount.

See also

returns a substring
(public member function)

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