Root.h

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/*
* Nirvana IDL front-end library.
*
* This is a part of the Nirvana project.
*
* Author: Igor Popov
*
* Copyright (c) 2021 Igor Popov.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
*
* Send comments and/or bug reports to:
*  popov.nirvana@gmail.com
*/
#ifndef IDLFE_AST_ROOT_H_
#define IDLFE_AST_ROOT_H_
#pragma once
 
#include "Item.h"
#include "Symbols.h"
#include "Container.h"
#include <filesystem>
#include <unordered_set>
 
namespace AST {
 
class Root :
    public Item,
    public Container
{
public:
    const std::filesystem::path& file () const noexcept
    {
        return main_file_;
    }
 
    bool visit (CodeGen& cg) const;
 
    operator Symbols& () noexcept
    {
        return symbols_;
    }
 
    operator const Symbols& () const noexcept
    {
        return symbols_;
    }
 
private:
    template <class T> friend class Ptr;
 
    Root (const std::string& file) :
        Item (Item::Kind::ROOT),
        main_file_ (add_file (file))
    {}
 
    friend class Builder;
 
    const std::filesystem::path& add_file (const std::string& name)
    {
        return *files_.insert (std::filesystem::absolute (name)).first;
    }
 
private:
    struct fs_hash
    {
        size_t operator () (const std::filesystem::path& p) const
        {
            return std::filesystem::hash_value (p);
        }
    };
 
    std::unordered_set <std::filesystem::path, fs_hash> files_;
    const std::filesystem::path& main_file_;
    Symbols symbols_;
};
 
}
 
#endif