choice.h

/* Copyright (c) 2024 Julian Benda
 *
 * This file is part of inkCPP which is released under MIT license.
 * See file LICENSE.txt or go to
 * https://github.com/JBenda/inkcpp for full license details.
 */
#pragma once
#include "system.h"
 
namespace ink
{
namespace runtime
{
    namespace internal
    {
        class basic_stream;
        class runner_impl;
        class string_table;
        class list_table;
    } // namespace internal

    class choice
    {
    public:
        int index() const { return _index; }

        const char* text() const { return _text; }

        bool has_tags() const { return _tags_start != _tags_end; }

        size_t num_tags() const;

        const char* get_tag(size_t index) const;
 
    private:
        friend class internal::runner_impl;
 
        uint32_t path() const { return _path; }
 
        choice& setup(
            internal::basic_stream&, internal::string_table& strings, internal::list_table& lists,
            int index, uint32_t path, thread_t thread, thread_t scope_thread,
            const internal::runner_impl& runner, size_t tags_start, size_t tags_end
        );
 
    protected:
        const char*                  _text       = nullptr; 
        const internal::runner_impl* _runner     = nullptr; 
        size_t                       _tags_start = 0;       
        size_t                       _tags_end   = 0;       
        uint32_t                     _path       = ~0U;     
        thread_t                     _thread     = ~0U;     
        thread_t _scope_thread = ~0U; 
        int      _index        = -1;  
    };
 
} // namespace runtime
} // namespace ink