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input_file_parser.hh
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/**
* @file input_file_parser.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Nov 13 2013
* @date last modification: Mon Dec 18 2017
*
* @brief Grammar definition for the input files
*
*
* Copyright (©) 2014-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu 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.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
// Boost
/* -------------------------------------------------------------------------- */
#include <boost/config/warning_disable.hpp>
#include <boost/spirit/include/phoenix_bind.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_fusion.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/variant/recursive_variant.hpp>
#ifndef AKANTU_INPUT_FILE_PARSER_HH_
#define AKANTU_INPUT_FILE_PARSER_HH_
namespace spirit = boost::spirit;
namespace qi = boost::spirit::qi;
namespace lbs = boost::spirit::qi::labels;
namespace ascii = boost::spirit::ascii;
namespace phx = boost::phoenix;
namespace akantu {
namespace parser {
struct error_handler_ {
template <typename, typename, typename, typename> struct result {
using type = void;
};
template <typename Iterator>
void operator()(qi::info const & what, Iterator err_pos, Iterator /*first*/,
Iterator /*last*/) const {
spirit::classic::file_position pos = err_pos.get_position();
AKANTU_EXCEPTION("Parse error [ "
<< "Expecting " << what << " instead of \"" << *err_pos
<< "\" ]"
<< " in file " << pos.file << " line " << pos.line
<< " column " << pos.column << std::endl
<< "'" << err_pos.get_currentline() << "'" << std::endl
<< std::setw(pos.column) << " "
<< "^- here");
}
private:
};
static ParserSection & create_subsection(
const ParserType & type, const boost::optional<std::string> & opt_name,
const boost::optional<std::string> & opt_option, ParserSection & sect) {
std::string option;
if (opt_option) {
option = *opt_option;
}
static size_t id = 12;
std::string name = "anonymous_" + std::to_string(id++);
if (opt_name) {
name = *opt_name;
}
ParserSection sect_tmp(name, type, option, sect);
return sect.addSubSection(sect_tmp);
}
template <typename Iter>
static bool create_parameter(boost::iterator_range<Iter> & rng,
std::string & value, ParserSection & sect) {
try {
std::string name(rng.begin(), rng.end());
name = trim(name);
spirit::classic::file_position pos = rng.begin().get_position();
ParserParameter param_tmp(name, value, sect);
param_tmp.setDebugInfo(pos.file, pos.line, pos.column);
sect.addParameter(param_tmp);
} catch (debug::Exception & e) {
return false;
}
return true;
}
static std::string concatenate(const std::string & t1,
const std::string & t2) {
return (t1 + t2);
}
/* ---------------------------------------------------------------------- */
/* Grammars definitions */
/* ---------------------------------------------------------------------- */
template <class Iterator>
struct InputFileGrammar
: qi::grammar<Iterator, void(), typename Skipper<Iterator>::type> {
InputFileGrammar(ParserSection * sect)
: InputFileGrammar::base_type(start, "input_file_grammar"),
parent_section(sect) {
/* clang-format off */
start
= mini_section(parent_section)
;
mini_section
= *(
entry (lbs::_r1)
| section(lbs::_r1)
)
;
entry
= (
qi::raw[key]
>> '='
> value
) [ lbs::_pass = phx::bind(&create_parameter<Iterator>,
lbs::_1,
lbs::_2,
*lbs::_r1) ]
;
section
= (
qi::no_case[section_type]
> qi::lexeme
[
-section_name
> -section_option
]
) [ lbs::_a = &phx::bind(&create_subsection,
lbs::_1,
phx::at_c<0>(lbs::_2),
phx::at_c<1>(lbs::_2),
*lbs::_r1) ]
> '['
> mini_section(lbs::_a)
> ']'
;
section_name
= qi::char_("a-zA-Z_") >> *qi::char_("a-zA-Z_0-9")
;
section_option
= (+ascii::space >> section_name) [ lbs::_val = lbs::_2 ]
;
key
= qi::char_("a-zA-Z_") >> *qi::char_("a-zA-Z_0-9")
;
value
= (
mono_line_value [ lbs::_a = phx::bind(&concatenate, lbs::_a, lbs::_1) ]
> *(
'\\' > mono_line_value [ lbs::_a = phx::bind(&concatenate, lbs::_a, lbs::_1) ]
)
) [ lbs::_val = lbs::_a ]
;
mono_line_value
= qi::lexeme
[
+(qi::char_ - (qi::char_('=') | spirit::eol | '#' | ';' | '\\'))
]
;
skipper
= ascii::space
| "#" >> *(qi::char_ - spirit::eol)
;
/* clang-format on */
#define AKANTU_SECTION_TYPE_ADD(r, data, elem) \
(BOOST_PP_STRINGIZE(elem), BOOST_PP_CAT(ParserType::_, elem))
section_type.add BOOST_PP_SEQ_FOR_EACH(AKANTU_SECTION_TYPE_ADD, _,
AKANTU_SECTION_TYPES);
#undef AKANTU_SECTION_TYPE_ADD
#if !defined(AKANTU_NDEBUG)
phx::function<error_handler_> const error_handler = error_handler_();
qi::on_error<qi::fail>(start,
error_handler(lbs::_4, lbs::_3, lbs::_1, lbs::_2));
#endif
section.name("section");
section_name.name("section-name");
section_option.name("section-option");
mini_section.name("section-content");
entry.name("parameter");
key.name("parameter-name");
value.name("parameter-value");
section_type.name("section-types-list");
mono_line_value.name("mono-line-value");
#if !defined AKANTU_NDEBUG
if (AKANTU_DEBUG_TEST(dblDebug)) {
// qi::debug(section);
qi::debug(section_name);
qi::debug(section_option);
// qi::debug(mini_section);
// qi::debug(entry);
qi::debug(key);
qi::debug(value);
qi::debug(mono_line_value);
}
#endif
}
const std::string & getErrorMessage() const { return error_message; };
using skipper_type = typename Skipper<Iterator>::type;
skipper_type skipper;
private:
std::string error_message;
qi::rule<Iterator, void(ParserSection *), skipper_type> mini_section;
qi::rule<Iterator, void(ParserSection *), qi::locals<ParserSection *>,
skipper_type>
section;
qi::rule<Iterator, void(), skipper_type> start;
qi::rule<Iterator, std::string()> section_name;
qi::rule<Iterator, std::string()> section_option;
qi::rule<Iterator, void(ParserSection *), skipper_type> entry;
qi::rule<Iterator, std::string(), skipper_type> key;
qi::rule<Iterator, std::string(), qi::locals<std::string>, skipper_type>
value;
qi::rule<Iterator, std::string(), skipper_type> mono_line_value;
qi::symbols<char, ParserType> section_type;
ParserSection * parent_section;
};
} // namespace parser
} // namespace akantu
#endif /* AKANTU_INPUT_FILE_PARSER_HH_ */

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