Settings definitions and handling

Functions and types to handle RABERU settings. More...

Classes
struct	rbr::is_equivalent< S1, S2 >
	Checks the equivalence of two rbr::settings. More...
struct	rbr::option< Keyword, Value >
	Callable object wrapper for functional default value. More...
struct	rbr::settings< Opts >
	Defines a group of options for processing. More...

Functions
template<concepts::keyword K, concepts::option... O>
constexpr auto	drop (K const &k, settings< O... > const &s)
	Remove an option from a rbr::settings.
template<concepts::keyword K, concepts::option... Os>
constexpr decltype(auto)	rbr::fetch (K const &k, Os const &... os)
	Retrieved a value via a keyword.
template<template< typename... > class List, typename... Opts>
constexpr auto	rbr::keywords (rbr::settings< Opts... > const &s)
	Retrieved the list of all keywords in a settings.
template<concepts::option... K1s, concepts::option... K2s>
constexpr auto	merge (settings< K1s... > const &opts, settings< K2s... > const &defs) noexcept
	Merge two instances of rbr::settings.
template<template< typename... > class List, typename... Opts>
constexpr auto	rbr::values (rbr::settings< Opts... > const &s)
	Retrieved the list of all value stored in a settings.