if_else

kyosu::if_else = eve::functor<if_else_t>

inlineconstexpr

Select a value between two arguments based on a logical mask.

Header file

#include <kyosu/functions.hpp>

Callable Signatures

namespace kyosu
{
  constexpr auto if_else(auto x, auto y, auto z ) noexcept;
}

Parameters

• x: logical mask.
• y, z: values to be selected.

Return value

 elementwise `y` or `z` according the truth value of `x`.

Example

#include <kyosu/kyosu.hpp>
#include <eve/wide.hpp>
#include <iostream>
 
int main()
{
  using kyosu::complex_t;
  using kyosu::quaternion_t;
 
 
  auto c = kyosu::complex_t<float>(3.5f,-2.9f);
  auto q =  kyosu::quaternion_t<float>(1.f,2.f,3.f,4.f);
  auto t = 1.0f;
  auto r = kyosu::if_else(t > 2.0f, q, c);
  std::cout << r << std::endl;
  return 0;
}