command_builder.h

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#ifndef KOUTIL_ARGS_COMMAND_BUILDER_H
#define KOUTIL_ARGS_COMMAND_BUILDER_H
 
#include "koutil/args/argument.h"
#include "koutil/args/command.h"
#include "koutil/args/handle.h"
#include "koutil/args/option.h"
#include "koutil/args/result.h"
#include <cassert>
#include <optional>
#include <string_view>
#include <utility>
 
namespace koutil::args {
 
template <extends_result Result = result_base_t> class command_builder_t {
public:
    using result_t   = Result;
    using command_t  = command_t<result_t>;
    using option_t   = option_t<result_t>;
    using argument_t = argument_t<result_t>;
 
    command_builder_t(std::string_view name, std::string_view description)
        : m_cmd(name, description) { }
 
    template <void_handle<std::optional<std::string_view>, result_t&> Handle>
    command_builder_t(std::string_view name, std::string_view description, Handle&& handle)
        : m_cmd(name, description, std::forward<Handle>(handle)) { }
 
    command_builder_t&& add_option(const option_t& option) && {
        assert(m_cmd.add_option(option));
        return std::move(*this);
    }
 
    command_builder_t&& add_argument(const argument_t& argument) && {
        m_cmd.add_argument(argument);
        return std::move(*this);
    }
 
    command_builder_t&& add_command(command_t&& command) && {
        assert(m_cmd.add_command(std::move(command)));
        return std::move(*this);
    }
 
    command_t build() && { return std::move(m_cmd); }
 
private:
    command_t m_cmd;
};
}
 
#endif