How do I merge and splice sequences with std::span?

In C++, the standard library introduced `std::span` as a way to handle contiguous sequences of elements. This lightweight view can be used to create slices of arrays or parts of containers, and can also be used for merging and splicing sequences. By leveraging `std::span`, you can manipulate and combine sequences efficiently.

Example of Merging and Splicing with std::span


            #include 
            #include 
            #include 

            void print_span(std::span s) {
                for (int value : s) {
                    std::cout << value << " ";
                }
                std::cout << std::endl;
            }

            int main() {
                std::vector vec1 = {1, 2, 3};
                std::vector vec2 = {4, 5, 6};

                // Create spans for both vectors
                std::span span1(vec1);
                std::span span2(vec2);

                // Merge spans by creating a larger vector that contains both spans
                std::vector merged(span1.begin(), span1.end());
                merged.insert(merged.end(), span2.begin(), span2.end());

                // Print the resulting merged sequence
                std::cout << "Merged Sequence: ";
                print_span(std::span(merged));

                // Splicing (for demonstration, we'll use a simple index approach)
                std::vector spliced;

                // Take elements from the middle of the first span and the full second span
                spliced.insert(spliced.end(), span1.begin() + 1, span1.begin() + 2);  // Takes the second element
                spliced.insert(spliced.end(), span2.begin(), span2.end());            // Takes all elements from span2

                // Print the spliced sequence
                std::cout << "Spliced Sequence: ";
                print_span(std::span(spliced));

                return 0;
            }

C++ std::span merging splicing sequences containers vectors

How do I merge and splice sequences with std::span?

Example of Merging and Splicing with std::span

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How do I merge and splice sequences with std::span?

Example of Merging and Splicing with std::span

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