drop()

template<concepts::keyword K, concepts::option... O>

constexpr auto drop ( K const &  k, settings< O... > const &  s  )

related

Remove an option from a rbr::settings.

Build a rbr::settings containing all options from s except for any option bound to the k rbr::keyword.

Parameters

k	Keyword to remove
s	Original rbr::settings

Returns

An instance of rbr::settings containing all options of s except those bound to k.

Example:

 
#include <raberu/raberu.hpp>
#include <iostream>
 
int main()
{
  using namespace rbr::literals;
  constexpr auto aligned = "aligned"_fl;
  constexpr auto transparent = "transparent"_fl;
 
rbr::settings v ( "surname"_kw = std::string{"john"}
                  , "value"_kw = 3.f
                  , aligned
                  , transparent
                  );
 
  std::cout << v << "\n";
 
  auto unaligned = drop(aligned, v);
  auto unamed    = drop("surname"_kw, v);
 
  std::cout << unaligned << "\n";
  std::cout << unamed << "\n";
}