Identifier.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_IDENTIFIER_H_
#define IDLFE_AST_IDENTIFIER_H_
#pragma once
 
#include <string>
 
namespace AST {
 
class Identifier : public std::string
{
public:
    bool operator < (const Identifier& r) const noexcept;
 
    Identifier () {}
 
    Identifier (const char* s, size_t len) :
        std::string (s, len)
    {}
 
    Identifier (const char* s) :
        std::string (s)
    {}
 
    Identifier (std::string&& s) noexcept :
        std::string (std::move (s))
    {}
 
    bool valid () const noexcept;
 
    bool operator == (const char* s) const noexcept;
 
    Identifier (const Identifier&) = default;
    Identifier (Identifier&&) = default;
    Identifier& operator = (const Identifier&) = default;
    Identifier& operator = (Identifier&&) = default;
 
    // Simplified tolower. We don't need to consider the locale settings.
    static char tolower (char c)
    {
        return ('A' <= c && c <= 'Z') ? c + 32 : c;
    }
 
private:
    static const char* const reserved_words_ [];
};
 
bool operator < (const Identifier& l, const char* r) noexcept;
 
bool operator < (const char* l, const Identifier& r) noexcept;
 
}
 
#endif