kicad/include/markup_parser.h

113 lines
3.4 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 Ola Rinta-Koski
* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU 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 General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MARKUP_PARSER_H
#define MARKUP_PARSER_H
#include <pegtl.hpp>
#include <pegtl/contrib/parse_tree.hpp>
#include <iostream>
#include <string>
#include <utf8.h>
namespace MARKUP
{
using namespace tao::pegtl;
struct subscript;
struct superscript;
struct overbar;
struct NODE : parse_tree::basic_node<NODE>
{
std::string asString() const;
std::string typeString() const;
wxString asWxString() const;
bool isOverbar() const { return is_type<MARKUP::overbar>(); }
bool isSubscript() const { return is_type<MARKUP::subscript>(); }
bool isSuperscript() const { return is_type<MARKUP::superscript>(); }
};
struct markup : sor< subscript,
superscript,
overbar > {};
/**
* anyString =
* a run of characters that do not start a command sequence, or if they do, they do not start
* a complete command prefix (command char + open brace)
*/
struct anyString : plus< seq< not_at< markup >,
utf8::any > > {};
struct anyStringWithinBraces : plus< seq< not_at< markup >,
utf8::not_one< '}' > > > {};
template< typename ControlChar >
struct braces : seq< seq< ControlChar, string< '{' > >,
until< string< '}' >, sor< anyStringWithinBraces,
subscript,
superscript,
overbar > > > {};
struct superscript : braces< string< '^' > > {};
struct subscript : braces< string< '_' > > {};
struct overbar : braces< string< '~' > > {};
/**
* Finally, the full grammar
*/
struct anything : sor< anyString,
subscript,
superscript,
overbar > {};
struct grammar : until< tao::pegtl::eof, anything > {};
template <typename Rule>
using selector = parse_tree::selector< Rule,
parse_tree::store_content::on< anyStringWithinBraces,
anyString >,
parse_tree::discard_empty::on< superscript,
subscript,
overbar > >;
class MARKUP_PARSER
{
public:
MARKUP_PARSER( const std::string& source ) :
in( source, "from_input" )
{}
std::unique_ptr<NODE> Parse();
private:
string_input<> in;
};
} // namespace MARKUP
#endif //MARKUP_PARSER_H