is_container_v

template<typename T>

bool kumi::is_container_v = kumi_implementation_defined

inlineconstexpr

Traits detecting types behaving like a kumi::container.

Template Parameters

T	Type to inspect

To be treated like a container, a user defined type must expose general container utilities. Those beeing :

• .size();
• .begin();
• .end();

Note

Standard C arrays are considered container types.

Helper type-trait

namespace kumi
{
  template<typename T> struct is_container;
}

Example:

#include <kumi/kumi.hpp>
#include <iostream>
#include <array>
#include <span>
#include <vector>
 
static_assert(kumi::concepts::static_container<std::array<int,10>>);
static_assert(kumi::concepts::product_type<std::array<int,10>>);
 
static_assert(kumi::concepts::static_container<std::span<int,10>>);
static_assert(!kumi::concepts::product_type<std::span<int,10>>);
 
static_assert(!kumi::concepts::static_container<std::span<int>>);
static_assert(!kumi::concepts::static_container<std::vector<int>>);
 
int main()
{
  auto data = std::array{1,2,3,4,5,6,7,8,9,10};
  kumi::for_each([](auto elt){ std::cout << elt << ", "; }, data);
  std::cout << "\n";
    
  auto my_span = std::span(data);
  kumi::for_each([](auto elt){ std::cout << elt << ", "; }, kumi::to_tuple(my_span));
}