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std::deque::append_range(3)    C++ Standard Libary   std::deque::append_range(3)

NAME
     std::deque::append_range - std::deque::append_range

Synopsis
	template< container-compatible-range<T> R >  (since C++23)
	void append_range( R&& rg );

	Inserts  copies  of  elements from the range rg before end(), in non-re-
     versing order.

	All iterators (including the end() iterator) are invalidated. No  refer-
     ences are
	invalidated.

	Each iterator in rg is dereferenced exactly once.

Parameters
	rg   -	 a container compatible range, that is, an input_range whose el-
     ements are
		 convertible to T

Type requirements
	-
	T  must be EmplaceConstructible into deque from *ranges::begin(rg). Oth-
     erwise, the
	behavior is undefined.

Return value
	(none)

Complexity
	Linear in size of rg. The number of calls to the constructor of T is ex-
     actly equal
	to the std::ranges::size(rg)).

Exceptions
	If an exception is thrown other than by the copy constructor, move  con-
     structor,
	assignment  operator,  or move assignment operator of T there are no ef-
     fects. If an
	exception is thrown while inserting a  single  element	at  either  end,
     there are no
	effects. Otherwise, if an exception is thrown by the move constructor of
     a
	non-CopyInsertable T, the effects are unspecified.

Notes
	    Feature-test macro	     Value    Std		    Feature
	__cpp_lib_containers_ranges  202202L  (C++23)  Ranges-aware construction
     and insertion

Example
     // Run this code

      #include <algorithm>
      #include <cassert>
      #include <deque>
      #include <list>

      int main()
      {
	  auto head = std::deque{1, 2, 3, 4};
	  const auto tail = std::list{-5, -6, -7};
      #ifdef __cpp_lib_containers_ranges
	  head.append_range(tail);
      #else
	  head.insert(head.end(), tail.cbegin(), tail.cend());
      #endif
	  assert(std::ranges::equal(head, std::deque{1, 2, 3, 4, -5, -6, -7}));
      }

See also
	prepend_range adds a range of elements to the beginning
	(C++23)       (public member function)
	insert_range  inserts a range of elements
	(C++23)       (public member function)
	push_back     adds an element to the end
		      (public member function)
	emplace_back  constructs an element in-place at the end
	(C++11)       (public member function)

http://cppreference.com 	   2024.06.10	     std::deque::append_range(3)
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