// sprit-forth: A portable subroutine-threaded Forth.
// Copyright (C) 2024  Clyne Sullivan <clyne@bitgloo.com>
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE.  See the GNU Library General Public License for
// more details.
//
// You should have received a copy of the GNU Library General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.

#ifndef EXECUTOR_HPP
#define EXECUTOR_HPP

#include "types.hpp"

#include <csetjmp>

class Executor
{
    std::jmp_buf jmpbuf;

public:
    FuncList ip = nullptr;

    /**
     * Begins execution with the given function pointer list.
     * @param list Function pointer list to execute
     */
    [[nodiscard]]
    Error executor(FuncList *list) noexcept;
    
    /**
     * Executes the given word by calling executor on its definition.
     * @param word The word to execute
     */
    [[nodiscard]]
    Error execute1(Word *word) noexcept;

    [[noreturn]]
    void terminate(Error error) noexcept;
};

extern Executor Exec;

#endif // EXECUTOR_HPP