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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 behavior
     is
	undefined.

Parameters
	(none)

Return value
	A reference to the stored predicate.

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

http://cppreference.com 	   2024.06.10	    std::ranges..._view::pred(3)
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