std::counte...ator::count(3) C++ Standard Libary std::counte...ator::count(3) NAME std::counted_iterator::count - std::counted_iterator::count Synopsis constexpr std::iter_difference_t<I> count() const noexcept; (since C++20) Returns the underlying length that is the distance to the end. Parameters (none) Return value The underlying length. Example // Run this code #include <cassert> #include <iostream> #include <iterator> int main() { constexpr static auto il = {1, 2, 3, 4, 5}; constexpr std::counted_iterator i1{il.begin() + 1, 3}; static_assert(i1.count() == 3); auto i2{i1}; for (; std::default_sentinel != i2; ++i2) std::cout << "*i2: " << *i2 << ", count(): " << i2.count() << '\n'; assert(i2.count() == 0); } Output: *i2: 2, count(): 3 *i2: 3, count(): 2 *i2: 4, count(): 1 See also base accesses the underlying iterator (C++20) (public member function) http://cppreference.com 2024.06.10 std::counte...ator::count(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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