drop()

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

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";
}