fcppt::options::commands< OptionsParser, SubCommands > Class Template Reference

Detailed Description

template<typename OptionsParser, typename... SubCommands>
class fcppt::options::commands< OptionsParser, SubCommands >

A parser for multiple sub commands.

A commands parser parses multiple sub commands. Each sub command consists of a parser and a name, i.e. (name_1, parser_1), ..., (name_n, parser_n). The parser first searches for the first argument, ignoring all option names from OptionsParser. If none is found, the parser fails. Otherwise, the first argument is arg, which is then compared to name_1, ..., name_n. If none of these is equal to arg, the parser fails. Otherwise, let arg = name_i, then the OptionsParser is used to parse everything up to the first argument, and parser_i is used to parse everything after.

Warning

Be careful not to include anything other than options or flags in OptionsParser, because otherwise this may lead to very confusing results.

Template Parameters

OptionsParser

A parser that should only parse options.

Public Types
using	variant_result = fcppt::variant::object<fcppt::options::result_of<SubCommands>...>
using	result_type

Public Member Functions
template<typename OptionsParserArg, typename... SubCommandsArgs> requires (std::conjunction_v< std::is_same<OptionsParser, std::remove_cvref_t<OptionsParserArg>>, std::is_same<SubCommands, std::remove_cvref_t<SubCommandsArgs>>...>)
	commands (OptionsParserArg &&, SubCommandsArgs &&...)
	Constructs a commands parser.
fcppt::options::parse_result< result_type >	parse (fcppt::options::state &&, fcppt::options::parse_context const &) const
fcppt::options::flag_name_set	flag_names () const
fcppt::options::option_name_set	option_names () const
fcppt::options::usage	usage () const

Member Typedef Documentation

result_type

template<typename OptionsParser, typename... SubCommands>

using fcppt::options::commands< OptionsParser, SubCommands >::result_type

Initial value:

 fcppt::record::object<
      fcppt::record::
          element<fcppt::options::options_label, fcppt::options::result_of<OptionsParser>>,
      fcppt::record::element<fcppt::options::sub_command_label, variant_result>>

variant_result

template<typename OptionsParser, typename... SubCommands>

using fcppt::options::commands< OptionsParser, SubCommands >::variant_result = fcppt::variant::object<fcppt::options::result_of<SubCommands>...>

Constructor & Destructor Documentation

commands()

template<typename OptionsParser, typename... SubCommands>

template<typename OptionsParserArg, typename... SubCommandsArgs>
requires (std::conjunction_v< std::is_same<OptionsParser, std::remove_cvref_t<OptionsParserArg>>, std::is_same<SubCommands, std::remove_cvref_t<SubCommandsArgs>>...>)

fcppt::options::commands< OptionsParser, SubCommands >::commands ( OptionsParserArg && , SubCommandsArgs && ... )

explicit

Constructs a commands parser.

Template Parameters

OptionsParserArg	A cv-ref to OptionsParser
SubCommandsArgs	Cv-refs to SubCommands

Member Function Documentation

flag_names()

template<typename OptionsParser, typename... SubCommands>

fcppt::options::flag_name_set fcppt::options::commands< OptionsParser, SubCommands >::flag_names ( ) const

nodiscard

option_names()

template<typename OptionsParser, typename... SubCommands>

fcppt::options::option_name_set fcppt::options::commands< OptionsParser, SubCommands >::option_names ( ) const

nodiscard

parse()

template<typename OptionsParser, typename... SubCommands>

fcppt::options::parse_result< result_type > fcppt::options::commands< OptionsParser, SubCommands >::parse ( fcppt::options::state && , fcppt::options::parse_context const &  ) const

nodiscard

usage()

template<typename OptionsParser, typename... SubCommands>

fcppt::options::usage fcppt::options::commands< OptionsParser, SubCommands >::usage ( ) const

nodiscard