any_of

any_of_t kumi::any_of {}

inlineconstexprnoexcept

Callable object checking if a unary predicate p returns true for any element of 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 any_of(T && t, Pred p) noexcept;

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

Parameters

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

Return value

• The evaluation of p(get<0>(t)) || ... || p(get<N-1>(t)) where N is the size of t.

Examples

Tuple

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

Record

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