keywords()

template<template< typename... > class List, typename... Opts>

constexpr auto rbr::keywords ( rbr::settings< Opts... > const &  s )

constexpr

Retrieved the list of all keywords in a settings.

Template Parameters

List	A n-ary template type to hold the result values

Parameters

s	Settings to inspect

Returns

An instance of rbr::type containing all the keyword from a rbr::settings.

Helper Types

namespace rbr::result
{
  template<template<typename...> class List, typename Settings> struct keywords;
 
  template<template<typename...> class List, typename Settings>
  using keywords_t = typename keywords<List,Settings>::type;
}

Return the type of a call to rbr::keywords.

Example:

 
#include <raberu/raberu.hpp>
#include <iostream>
#include <tuple>
 
int main()
{
  using namespace rbr::literals;
 
  auto opts = rbr::settings("size"_kw = 75ULL, "modal"_fl, "value"_kw = 13.37);
  auto kws  = rbr::keywords<std::tuple>(opts);
 
  std::apply( []<typename... T>(T const&...)
              {
                ((std::cout << typename T::id_type{} << "\n"),...);
              }
            , kws
            );
}