none_of

none_of_t kumi::none_of {}

inlineconstexprnoexcept

Callable object checking if a unary predicate p does not returns true for any element in t.

On a record type, the function operates on the underlying elements of the fields.

Header file

#include <kumi/algorithm/predicates.hpp>

Call Signature

template<product_type T, typename Pred>
constexpr auto none_of(T && t, Pred p) noexcept;

template<product_type T, typename Pred>
constexpr auto none_of(T && t) noexcept;

Parameters

• t: Product Type to process
• p: Unary predicate

Return value

• The evaluation of !any_of(t,p).

Examples

• Tuple

  
  #include <kumi/kumi.hpp>
  #include <iostream>
   
  int main()
  {
    auto t = kumi::tuple{1,2.,3.f};
    std::cout << std::boolalpha << kumi::none_of( t, [](auto e) { return e > 10.; }) << "\n";
   
    auto u = kumi::tuple{0,0.,0.f};
    std::cout << std::boolalpha << kumi::none_of( u ) << "\n";
  }

• Record

  
  #include <kumi/kumi.hpp>
  #include <iostream>
   
  int main()
  {
    using namespace kumi::literals;
    auto t = kumi::record{"a"_id = 1,"b"_id = 2.,"c"_id = 3.f};
    std::cout << std::boolalpha << kumi::none_of( t, [](auto e) { return e > 10.; }) << "\n";
   
    auto u = kumi::record{"a"_id = 0,"b"_id = 0.,"c"_id = 0.f};
    std::cout << std::boolalpha << kumi::none_of( u ) << "\n";
  }