std::ranges:: views:: split, std::ranges:: split_view

split_view models the concepts forward_range , and common_range when the underlying view V models respective concepts.

The inner range ( ranges:: range_reference_t < split_view > ) is a ranges:: subrange < ranges:: iterator_t < V >> , which models common_range , models sized_range when ranges:: iterator_t < V > models std:: sized_sentinel_for < ranges:: iterator_t < V >> , and models contiguous_range , random_access_range , bidirectional_range , and forward_range when V models respective concepts.

Data members

Member functions

Nested classes

Deduction guides

Notes

Before P2210R2 , split_view used a lazy mechanism for splitting, and thus could not keep the bidirectional, random access, or contiguous properties of the underlying view, or make the iterator type of the inner range same as that of the underlying view. Consequently, it is redesigned by P2210R2 , and the lazy mechanism is moved to lazy_split_view .

The delimiter pattern generally should not be an ordinary string literal, as it will consider the null terminator to be necessary part of the delimiter; therefore, it is advisable to use a std::string_view literal instead.

Example

#include <iomanip>
#include <iostream>
#include <ranges>
#include <string_view>
 
int main()
{
    using std::operator""sv;
    constexpr auto words{"Hello^_^C++^_^20^_^!"sv};
    constexpr auto delim{"^_^"sv};
 
    for (const auto word : std::views::split(words, delim))
        // with string_view's C++23 range constructor:
        std::cout << std::quoted(std::string_view(word)) << ' ';
    std::cout << '\n';
}

"Hello" "C++" "20" "!"

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

See also