Luna::copy_construct_range_n

template <typename _Iter1, typename _Iter2>
auto copy_construct_range_n(_Iter1 first, usize count, _Iter2 d_first) -> enable_if_t<!Impl::copy_construct_range_is_value_type_trivial< _Iter1, _Iter2 >::value, _Iter2 >

Copy-constructs a range of objects. The range is provided by first object and object count.

Parameters

• in first

  An iterator to the first object to be copied from.

• in count

  The number of objects to copy-construct.

• in d_first

  An iterator to the first object to be constructed.

Return value

Returns an iterator to the one-past-last object to be constructed.

This function uses each object in the range [first, first + count) to performs copy initialization on corresponding objects beginning with d_first.

Valid Usage

• The source range and the destination range must not overlap.

Remark

memcpy is used to copy the data directly if:1. Both _Iter1 and _Iter2 are pointer types.

1. value_type of _Iter1 and _Iter2 is same.

2. value_type is trivially copy constructible. Otherwise, the copy constructor is called for every object to construct objects in destination range.