contains_only()

template<concepts::option... Opts>

template<concepts::keyword... Keys>

constexpr auto rbr::settings< Opts >::contains_only ( Keys const &... ks )

inlinestaticconstexprnoexcept

Checks if rbr::settings contains options based only on selected keywords.

Parameters

ks	Keywords to check

Returns

An instance of std::true_type if current setting contains only options based on any of the ks. Otherwise, return an instance of std::false_type.

Example:

#include <raberu/raberu.hpp>
#include <iostream>
 
using namespace rbr::literals;
 
template<rbr::concepts::settings S> void check_contains_only(S const&)
{
  if constexpr (S::contains_only("value"_kw, "active"_fl)) std::cout << "Correct settings\n";
  else std::cout << "Incorrect settings\n";
}
 
int main()
{
  check_contains_only(rbr::settings("value"_kw = 9));
  check_contains_only(rbr::settings("active"_fl));
  check_contains_only(rbr::settings("malus"_kw = 6.5, "value"_kw = 17));
  check_contains_only(rbr::settings("active"_fl, "value"_kw = 17));
  check_contains_only(rbr::settings("active"_fl, "value"_kw = 17, "other"_kw = false));
}