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std::ranges..._view::pred(3) C++ Standard Libary std::ranges..._view::pred(3) NAME std::ranges::drop_while_view::pred - std::ranges::drop_while_view::pred Synopsis constexpr const Pred& pred() const; (since C++20) Returns a reference to the stored predicate. If *this does not store a predicate (e.g. an exception is thrown on the assignment to *this, which copy-constructs or move-constructs a Pred), the be- havior is undefined. Parameters (none) Return value a reference to the stored predicate Example // Run this code #include <array> #include <iostream> #include <iomanip> #include <ranges> int main() { constexpr std::array data{ 0, -1, -2, 3, 1, 4, 1, 5, }; auto view = std::ranges::drop_while_view{ data, [](int x) { return x <= 0; } }; std::cout << std::boolalpha; for (int x: data) { std::cout << "predicate(" << std::setw(2) << x << ") : " << view.pred()(x) << '\n'; } } Output: predicate( 0) : true predicate(-1) : true predicate(-2) : true predicate( 3) : false predicate( 1) : false predicate( 4) : false predicate( 1) : false predicate( 5) : false http://cppreference.com 2022.07.31 std::ranges..._view::pred(3)
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