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algebraic_parser.hh
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/**
* @file algebraic_parser.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Nov 13 2013
* @date last modification: Fri May 16 2014
*
* @brief algebraic_parser definition of the grammar
*
* @section LICENSE
*
* Copyright (©) 2014 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/qi.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/phoenix_object.hpp>
#ifndef __AKANTU_ALGEBRAIC_PARSER_HH__
#define __AKANTU_ALGEBRAIC_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 algebraic_error_handler_
{
template <typename, typename, typename>
struct result { typedef void type; };
template <typename Iterator>
void operator()(qi::info const& what,
Iterator err_pos,
Iterator last) const
{
AKANTU_EXCEPTION("Error! Expecting "
<< what // what failed?
<< " here: \""
<< std::string(err_pos, last) // iterators to error-pos, end
<< "\"");
}
};
static Real my_min(Real a, Real b) { return std::min(a, b); }
static Real my_max(Real a, Real b) { return std::max(a, b); }
template<class Iterator>
struct Skipper {
typedef qi::rule<Iterator, void()> type;
};
struct lazy_unary_func_ {
template <typename Funct, typename T>
struct result { typedef T type; };
template <typename Funct, typename T>
typename result<Funct, T>::type operator()(Funct f, T a) const {
return f(a);
}
};
struct lazy_binary_func_ {
template <typename Funct, typename T1, typename T2>
struct result { typedef T1 type; };
template <typename Funct, typename T1, typename T2>
typename result<Funct, T1, T2>::type operator()(Funct f, T1 a, T2 b) const {
return f(a, b);
}
};
struct lazy_pow_ {
template <typename T1, typename T2>
struct result { typedef T1 type; };
template <typename T1, typename T2>
typename result<T1, T2>::type operator()(T1 a, T2 b) const {
return std::pow(a, b);
}
};
struct lazy_eval_param_ {
template <typename T1, typename T2, typename res>
struct result { typedef res type; };
template <typename T1, typename T2, typename res>
res operator()(T1 a, const T2 & section,
__attribute__((unused)) const res & result) const {
return section.getParameter(a, _ppsc_current_and_parent_scope);
}
};
template<class Iterator, typename Skipper = spirit::unused_type>
struct AlgebraicGrammar : qi::grammar<Iterator, Real(), Skipper> {
AlgebraicGrammar(const ParserSection & section) : AlgebraicGrammar::base_type(start,
"algebraic_grammar"),
section(section) {
phx::function<algebraic_error_handler_> const error_handler = algebraic_error_handler_();
phx::function<lazy_pow_> lazy_pow;
phx::function<lazy_unary_func_> lazy_unary_func;
phx::function<lazy_binary_func_> lazy_binary_func;
phx::function<lazy_eval_param_> lazy_eval_param;
start
= expr.alias()
;
expr
= term [ lbs::_val = lbs::_1 ]
>> *( ('+' > term [ lbs::_val += lbs::_1 ])
| ('-' > term [ lbs::_val -= lbs::_1 ])
)
;
term
= factor [ lbs::_val = lbs::_1 ]
>> *( ('*' > factor [ lbs::_val *= lbs::_1 ])
| ('/' > factor [ lbs::_val /= lbs::_1 ])
)
;
factor
= number [ lbs::_val = lbs::_1 ]
>> *("**" > number [ lbs::_val = lazy_pow(lbs::_val, lbs::_1) ])
;
number
= real [ lbs::_val = lbs::_1 ]
| ('-' > number [ lbs::_val = -lbs::_1 ])
| ('+' > number [ lbs::_val = lbs::_1 ])
| constant [ lbs::_val = lbs::_1 ]
| function [ lbs::_val = lbs::_1 ]
| ('(' > expr > ')') [ lbs::_val = lbs::_1 ]
| variable [ lbs::_val = lbs::_1 ]
;
function
= (qi::no_case[unary_function]
> '('
> expr
> ')') [ lbs::_val = lazy_unary_func(lbs::_1, lbs::_2) ]
| (qi::no_case[binary_function]
> '(' >> expr
> ',' >> expr
> ')') [ lbs::_val = lazy_binary_func(lbs::_1, lbs::_2, lbs::_3) ]
;
variable
= key [ lbs::_val = lazy_eval_param(lbs::_1, section, lbs::_val) ]
;
key
= qi::no_skip[qi::char_("a-zA-Z_") >> *qi::char_("a-zA-Z_0-9")] // coming from the InputFileGrammar
;
constant.add
("pi", M_PI)
("e", M_E);
unary_function.add
("abs" , &std::abs )
("acos" , &std::acos )
("asin" , &std::asin )
("atan" , &std::atan )
("ceil" , &std::ceil )
("cos" , &std::cos )
("cosh" , &std::cosh )
("exp" , &std::exp )
("floor" , &std::floor )
("log10" , &std::log10 )
("log" , &std::log )
("sin" , &std::sin )
("sinh" , &std::sinh )
("sqrt" , &std::sqrt )
("tan" , &std::tan )
("tanh" , &std::tanh )
#if defined(AKANTU_CORE_CXX11 )
("acosh" , &std::acosh )
("asinh" , &std::asinh )
("atanh" , &std::atanh )
("exp2" , &std::exp2 )
("expm1" , &std::expm1 )
("log1p" , &std::log1p )
("log2" , &std::log2 )
("erf" , &std::erf )
("erfc" , &std::erfc )
("lgamma", &std::lgamma)
("tgamma", &std::tgamma)
("trunc" , &std::trunc )
("round" , &std::round )
// ("crbt" , &std::crbt )
#endif
;
binary_function.add
("pow" , &std::pow )
("min" , &parser::my_min)
("max" , &parser::my_max)
("atan2", &std::atan2 )
("fmod" , &std::fmod )
#if defined(AKANTU_CORE_CXX11)
("hypot", &std::hypot )
#endif
;
qi::on_error<qi::fail>(start, error_handler(lbs::_4, lbs::_3, lbs::_2));
expr .name("expression");
term .name("term");
factor .name("factor");
number .name("numerical-value");
variable.name("variable");
function.name("function");
constant.name("constants-list");
unary_function.name("unary-functions-list");
binary_function.name("binary-functions-list");
}
private:
qi::rule<Iterator, Real(), Skipper> start;
qi::rule<Iterator, Real(), Skipper> expr;
qi::rule<Iterator, Real(), Skipper> term;
qi::rule<Iterator, Real(), Skipper> factor;
qi::rule<Iterator, Real(), Skipper> number;
qi::rule<Iterator, Real(), Skipper> variable;
qi::rule<Iterator, Real(), Skipper> function;
qi::rule<Iterator, std::string(), Skipper> key;
qi::real_parser< Real, qi::real_policies<Real> > real;
qi::symbols<char, Real> constant;
qi::symbols<char, Real (*) (Real)> unary_function;
qi::symbols<char, Real (*) (Real, Real)> binary_function;
const ParserSection & section;
};
/* ---------------------------------------------------------------------- */
/* Vector Parser */
/* ---------------------------------------------------------------------- */
struct parsable_vector {
operator Vector<Real>() {
Vector<Real> tmp(_cells.size());
std::vector<Real>::iterator it = _cells.begin();
for (UInt i = 0; it != _cells.end(); ++it, ++i) tmp(i) = *it;
return tmp;
}
std::vector<Real> _cells;
};
struct parsable_matrix {
operator Matrix<Real>() {
size_t cols = 0;
std::vector<parsable_vector>::iterator it_rows = _cells.begin();
for (;it_rows != _cells.end(); ++it_rows) cols = std::max(cols, it_rows->_cells.size());
Matrix<Real> tmp(_cells.size(), _cells[0]._cells.size(), 0.);
it_rows = _cells.begin();
for (UInt i = 0; it_rows != _cells.end(); ++it_rows, ++i) {
std::vector<Real>::iterator it_cols = it_rows->_cells.begin();
for (UInt j = 0; it_cols != it_rows->_cells.end(); ++it_cols, ++j) {
tmp(i, j) = *it_cols;
}
}
return tmp;
}
std::vector<parsable_vector> _cells;
};
/* ---------------------------------------------------------------------- */
struct lazy_cont_add_ {
template <typename T1, typename T2>
struct result { typedef void type; };
template <typename T1, typename T2>
void operator()(T1 & cont, T2 & value) const {
cont._cells.push_back(value);
}
};
/* ---------------------------------------------------------------------- */
template<class Iterator, typename Skipper = spirit::unused_type>
struct VectorGrammar : qi::grammar<Iterator, parsable_vector(), Skipper> {
VectorGrammar(const ParserSection & section) : VectorGrammar::base_type(start,
"vector_algebraic_grammar"),
number(section) {
phx::function<algebraic_error_handler_> const error_handler = algebraic_error_handler_();
//phx::function<lazy_algebraic_eval_> lazy_algebraic_eval;
phx::function<lazy_cont_add_> lazy_vector_add;
start
= '[' > vector > ']'
;
vector
= ( number [ lazy_vector_add(lbs::_a, lbs::_1) ]
>> *( ','
>> number [ lazy_vector_add(lbs::_a, lbs::_1) ]
)
) [ lbs::_val = lbs::_a ]
;
qi::on_error<qi::fail>(start, error_handler(lbs::_4, lbs::_3, lbs::_2));
start .name("start");
vector.name("vector");
number.name("value");
}
private:
qi::rule<Iterator, parsable_vector(), Skipper> start;
qi::rule<Iterator, parsable_vector(), qi::locals<parsable_vector>, Skipper> vector;
qi::rule<Iterator, Real(), Skipper> value;
AlgebraicGrammar<Iterator, Skipper> number;
};
/* ---------------------------------------------------------------------- */
struct lazy_vector_eval_ {
template <typename T1, typename T2, typename res>
struct result { typedef bool type; };
template <typename T1, typename T2, typename res>
bool operator()(T1 a, const T2 & section, res & result) const {
std::string value = section.getParameter(a, _ppsc_current_and_parent_scope);
std::string::const_iterator b = value.begin();
std::string::const_iterator e = value.end();
parser::VectorGrammar<std::string::const_iterator, qi::space_type> grammar(section);
return qi::phrase_parse(b, e, grammar, qi::space, result);
}
};
/* ---------------------------------------------------------------------- */
template<class Iterator, typename Skipper = spirit::unused_type>
struct MatrixGrammar : qi::grammar<Iterator, parsable_matrix(), Skipper> {
MatrixGrammar(const ParserSection & section) : MatrixGrammar::base_type(start,
"matrix_algebraic_grammar"),
vector(section) {
phx::function<algebraic_error_handler_> const error_handler = algebraic_error_handler_();
phx::function<lazy_vector_eval_> lazy_vector_eval;
phx::function<lazy_cont_add_> lazy_matrix_add;
start
= '[' > matrix > ']'
;
matrix
= ( rows [ lazy_matrix_add(lbs::_a, lbs::_1) ]
>> *( ','
>> rows [ lazy_matrix_add(lbs::_a, lbs::_1) ]
)
) [ lbs::_val = lbs::_a ]
;
rows
= eval_vector
| vector
;
eval_vector
= (key [ lbs::_pass = lazy_vector_eval(lbs::_1, section, lbs::_a) ]) [lbs::_val = lbs::_a]
;
key
= qi::char_("a-zA-Z_") >> *qi::char_("a-zA-Z_0-9") // coming from the InputFileGrammar
;
qi::on_error<qi::fail>(start, error_handler(lbs::_4, lbs::_3, lbs::_2));
start.name("matrix");
matrix.name("all_rows");
rows .name("rows");
vector.name("vector");
eval_vector.name("eval_vector");
}
private:
qi::rule<Iterator, parsable_matrix(), Skipper> start;
qi::rule<Iterator, parsable_matrix(), qi::locals<parsable_matrix>, Skipper> matrix;
qi::rule<Iterator, parsable_vector(), Skipper> rows;
qi::rule<Iterator, parsable_vector(), qi::locals<parsable_vector>, Skipper> eval_vector;
qi::rule<Iterator, std::string(), Skipper> key;
VectorGrammar<Iterator, Skipper> vector;
};
/* ---------------------------------------------------------------------- */
/* Randon Generator */
/* ---------------------------------------------------------------------- */
struct ParsableRandomGenerator {
ParsableRandomGenerator(Real base = Real(),
const RandomDistributionType & type = _rdt_not_defined,
const parsable_vector & parameters = parsable_vector()) :
base(base), type(type), parameters(parameters) {}
Real base;
RandomDistributionType type;
parsable_vector parameters;
};
/* ---------------------------------------------------------------------- */
template<class Iterator, typename Skipper = spirit::unused_type>
struct RandomGeneratorGrammar : qi::grammar<Iterator, ParsableRandomGenerator(), Skipper> {
RandomGeneratorGrammar(const ParserSection & section) : RandomGeneratorGrammar::base_type(start,
"random_generator_grammar"),
number(section) {
phx::function<algebraic_error_handler_> const error_handler = algebraic_error_handler_();
phx::function<lazy_cont_add_> lazy_params_add;
start
= generator.alias()
;
generator
= qi::hold[distribution [ lbs::_val = lbs::_1 ] ]
| number [ lbs::_val = phx::construct<ParsableRandomGenerator>(lbs::_1) ]
;
distribution
= (
number
>> generator_type
>> '['
>> generator_params
>> ']'
) [ lbs::_val = phx::construct<ParsableRandomGenerator>(lbs::_1, lbs::_2, lbs::_3) ]
;
generator_params
= ( number [ lazy_params_add(lbs::_a, lbs::_1) ]
>> *( ','
> number [ lazy_params_add(lbs::_a, lbs::_1) ]
)
) [ lbs::_val = lbs::_a ]
;
#define AKANTU_RANDOM_DISTRIBUTION_TYPE_ADD(r, data, elem) \
(BOOST_PP_STRINGIZE(BOOST_PP_TUPLE_ELEM(2, 0, elem)), \
AKANTU_RANDOM_DISTRIBUTION_TYPES_PREFIX(BOOST_PP_TUPLE_ELEM(2, 0, elem)))
generator_type.add
BOOST_PP_SEQ_FOR_EACH(AKANTU_RANDOM_DISTRIBUTION_TYPE_ADD, _, AKANTU_RANDOM_DISTRIBUTION_TYPES);
#undef AKANTU_RANDOM_DISTRIBUTION_TYPE_ADD
qi::on_error<qi::fail>(start, error_handler(lbs::_4, lbs::_3, lbs::_2));
start .name("random-generator");
generator .name("random-generator");
distribution .name("random-distribution");
generator_type .name("generator-type");
generator_params.name("generator-parameters");
number .name("number");
}
private:
qi::rule<Iterator, ParsableRandomGenerator(), Skipper> start;
qi::rule<Iterator, ParsableRandomGenerator(), Skipper> generator;
qi::rule<Iterator, ParsableRandomGenerator(), Skipper> distribution;
qi::rule<Iterator, parsable_vector(), qi::locals<parsable_vector>, Skipper> generator_params;
AlgebraicGrammar<Iterator, Skipper> number;
qi::symbols<char, RandomDistributionType> generator_type;
};
}
}
#endif /* __AKANTU_ALGEBRAIC_PARSER_HH__ */
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