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/*=============================================================================
Copyright (c) 2001-2010 Joel de Guzman
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#include <boost/config/warning_disable.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/bind.hpp>
#include <iostream>
// Presented are various ways to attach semantic actions
// * Using plain function pointer
// * Using simple function object
// * Using boost.bind with a plain function
// * Using boost.bind with a member function
// * Using boost.lambda
//[tutorial_semantic_action_functions
namespace client
{
namespace qi = boost::spirit::qi;
// A plain function
void print(int const& i)
{
std::cout << i << std::endl;
}
// A member function
struct writer
{
void print(int const& i) const
{
std::cout << i << std::endl;
}
};
// A function object
struct print_action
{
void operator()(int const& i, qi::unused_type, qi::unused_type) const
{
std::cout << i << std::endl;
}
};
}
//]
int main()
{
using boost::spirit::qi::int_;
using boost::spirit::qi::parse;
using client::print;
using client::writer;
using client::print_action;
{ // example using plain function
char const *first = "{42}", *last = first + std::strlen(first);
//[tutorial_attach_actions1
parse(first, last, '{' >> int_[&print] >> '}');
//]
}
{ // example using simple function object
char const *first = "{43}", *last = first + std::strlen(first);
//[tutorial_attach_actions2
parse(first, last, '{' >> int_[print_action()] >> '}');
//]
}
{ // example using boost.bind with a plain function
char const *first = "{44}", *last = first + std::strlen(first);
//[tutorial_attach_actions3
parse(first, last, '{' >> int_[boost::bind(&print, _1)] >> '}');
//]
}
{ // example using boost.bind with a member function
char const *first = "{44}", *last = first + std::strlen(first);
//[tutorial_attach_actions4
writer w;
parse(first, last, '{' >> int_[boost::bind(&writer::print, &w, _1)] >> '}');
//]
}
{ // example using boost.lambda
namespace lambda = boost::lambda;
char const *first = "{45}", *last = first + std::strlen(first);
using lambda::_1;
//[tutorial_attach_actions5
parse(first, last, '{' >> int_[std::cout << _1 << '\n'] >> '}');
//]
}
return 0;
}
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