std::ranges::drop_while_view<V,Pred>::pred
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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 behavior is undefined.
[edit] Parameters
(none)
[edit] Return value
A reference to the stored predicate pred_.
[edit] Example
Run this code
#include <array> #include <iomanip> #include <iostream> #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