push_front()

template<product_type Tuple, typename T >

constexpr auto kumi::push_front ( Tuple &&  t, T &&  v  )

inlineconstexpr

Constructs a tuple by adding a value v at the beginning of t.

Parameters

t	Base tuple
v	Value to insert in front of t

Returns

A tuple composed of v followed by all elements of t in order.

Helper type

namespace kumi::result
{
  template<product_type Tuple, typename T> struct push_front;
 
  template<product_type Tuple, typename T>
  using push_front_t = typename push_front<Tuples...>::type;
}

Computes the return type of a call to kumi::push_front

Examples:

 
#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  std::cout << kumi::push_front( kumi::tuple{}, 63.21)  << "\n";
 
  kumi::tuple t{1,2.,3.4f};
  std::cout << t                          << "\n";
  std::cout << kumi::push_front(t, 'Z')   << "\n";
}

 
#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  using namespace kumi::literals;
 
  std::cout << kumi::push_front( kumi::record{}, "a"_f = 63.21)  << "\n";
 
  kumi::record t{"a"_f = 1,"b"_f = 2.,"c"_f = 3.4f};
  std::cout << t                          << "\n";
  std::cout << kumi::push_front(t, "d"_f = 'Z')   << "\n";
}