mapnik/include/mapnik/expression_node.hpp
2016-02-24 12:10:25 +01:00

211 lines
6.8 KiB
C++

/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 Artem Pavlenko
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_EXPRESSION_NODE_HPP
#define MAPNIK_EXPRESSION_NODE_HPP
// mapnik
#include <mapnik/value_types.hpp>
#include <mapnik/value.hpp>
#include <mapnik/config.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/attribute.hpp>
#include <mapnik/function_call.hpp>
#include <mapnik/expression_node_types.hpp>
// stl
#include <memory>
namespace mapnik
{
using value_type = mapnik::value;
template <typename Tag> struct make_op;
template <> struct make_op<mapnik::tags::negate> { using type = std::negate<value_type>;};
template <> struct make_op<mapnik::tags::plus> { using type = std::plus<value_type>;};
template <> struct make_op<mapnik::tags::minus> { using type = std::minus<value_type>;};
template <> struct make_op<mapnik::tags::mult> { using type = std::multiplies<value_type>;};
template <> struct make_op<mapnik::tags::div> { using type = std::divides<value_type>;};
template <> struct make_op<mapnik::tags::mod> { using type = std::modulus<value_type>;};
template <> struct make_op<mapnik::tags::less> { using type = std::less<value_type>;};
template <> struct make_op<mapnik::tags::less_equal> { using type = std::less_equal<value_type>;};
template <> struct make_op<mapnik::tags::greater> { using type = std::greater<value_type>;};
template <> struct make_op<mapnik::tags::greater_equal> { using type = std::greater_equal<value_type>;};
template <> struct make_op<mapnik::tags::equal_to> { using type = std::equal_to<value_type>;};
template <> struct make_op<mapnik::tags::not_equal_to> { using type = std::not_equal_to<value_type>;};
template <> struct make_op<mapnik::tags::logical_not> { using type = std::logical_not<value_type>;};
template <> struct make_op<mapnik::tags::logical_and> { using type = std::logical_and<value_type>;};
template <> struct make_op<mapnik::tags::logical_or> { using type = std::logical_or<value_type>;};
template <typename Tag>
struct unary_node
{
unary_node (expr_node const& a)
: expr(a) {}
static const char* type()
{
return Tag::str();
}
expr_node expr;
};
template <typename Tag>
struct binary_node
{
binary_node(expr_node const& a, expr_node const& b)
: left(a),
right(b) {}
static const char* type()
{
return Tag::str();
}
expr_node left,right;
};
struct unary_function_call
{
using argument_type = expr_node;
unary_function_call() = default;
unary_function_call(unary_function_impl _fun, argument_type const& _arg)
: fun(_fun), arg(_arg) {}
unary_function_impl fun;
argument_type arg;
};
struct binary_function_call
{
using argument_type = expr_node;
binary_function_call() = default;
binary_function_call(binary_function_impl _fun, argument_type const& _arg1, argument_type const& _arg2)
: fun(_fun), arg1(_arg1), arg2(_arg2) {}
binary_function_impl fun;
argument_type arg1;
argument_type arg2;
};
// pimpl
struct _regex_match_impl;
struct _regex_replace_impl;
struct MAPNIK_DECL regex_match_node
{
regex_match_node(transcoder const& tr, expr_node const& a, std::string const& ustr);
mapnik::value apply(mapnik::value const& v) const;
std::string to_string() const;
expr_node expr;
// TODO - use unique_ptr once https://github.com/mapnik/mapnik/issues/2457 is fixed
std::shared_ptr<_regex_match_impl> impl_;
};
struct MAPNIK_DECL regex_replace_node
{
regex_replace_node(transcoder const& tr, expr_node const& a, std::string const& ustr, std::string const& f);
mapnik::value apply(mapnik::value const& v) const;
std::string to_string() const;
expr_node expr;
// TODO - use unique_ptr once https://github.com/mapnik/mapnik/issues/2457 is fixed
std::shared_ptr<_regex_replace_impl> impl_;
};
inline expr_node & operator- (expr_node& expr)
{
return expr = unary_node<mapnik::tags::negate>(expr);
}
inline expr_node & operator += ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::plus>(left,right);
}
inline expr_node & operator -= ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::minus>(left,right);
}
inline expr_node & operator *= ( expr_node &left , expr_node const& right)
{
return left = binary_node<mapnik::tags::mult>(left,right);
}
inline expr_node & operator /= ( expr_node &left , expr_node const& right)
{
return left = binary_node<mapnik::tags::div>(left,right);
}
inline expr_node & operator %= ( expr_node &left , expr_node const& right)
{
return left = binary_node<mapnik::tags::mod>(left,right);
}
inline expr_node & operator < ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::less>(left,right);
}
inline expr_node & operator <= ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::less_equal>(left,right);
}
inline expr_node & operator > ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::greater>(left,right);
}
inline expr_node & operator >= ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::greater_equal>(left,right);
}
inline expr_node & operator == ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::equal_to>(left,right);
}
inline expr_node & operator != ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::not_equal_to>(left,right);
}
inline expr_node & operator ! (expr_node & expr)
{
return expr = unary_node<mapnik::tags::logical_not>(expr);
}
inline expr_node & operator && ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::logical_and>(left,right);
}
inline expr_node & operator || ( expr_node &left, expr_node const& right)
{
return left = binary_node<mapnik::tags::logical_or>(left,right);
}
}
#endif //MAPNIK_EXPRESSION_NODE_HPP