std::ranges::drop_while_view<V,Pred>::pred
From cppreference.com
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.
Parameters
(none)
Return value
A reference to the stored predicate pred_.
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