boost/spirit/home/classic/actor.hpp
/*=============================================================================
Copyright (c) 2003 Jonathan de Halleux (dehalleux@pelikhan.com)
http://spirit.sourceforge.net/
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)
=============================================================================*/
#ifndef BOOST_SPIRIT_ACTOR_HPP
#define BOOST_SPIRIT_ACTOR_HPP
#include <boost/spirit/home/classic/version.hpp>
///////////////////////////////////////////////////////////////////////////////
//
// Actors documentation and convention
//
// Actors
//
// Actors are predefined semantic action functors. They are used to do an
// action on the parse result if the parser has had a successful match. An
// example of actor is the append_actor described in the Spirit
// documentation.
//
// The action takes place through a call to the () operator: single argument
// () operator call for character parsers and two argument (first,last) call
// for phrase parsers. Actors should implement at least one of the two ()
// operator.
//
// Actor instances are not created directly since they usually involve a
// number of template parameters. Instead generator functions ("helper
// functions") are provided to generate actors according to their arguments.
// All helper functions have the "_a" suffix. For example, append_actor is
// created using the append_a function.
//
// Policy holder actors and policy actions
//
// A lot of actors need to store reference to one or more objects. For
// example, actions on container need to store a reference to the container.
// Therefore, this kind of actor have been broken down into
//
// - a action policy that does the action (act method),
// - a policy holder actor that stores the references and feeds the act
// method.
//
// Policy holder actors
//
// Policy holder have the following naming convention:
// <member>_ >> *<member> >> !value >> actor
// where member are the policy stored member, they can be of type:
//
// - ref, a reference,
// - const_ref, a const reference,
// - value, by value,
// - empty, no stored members
// - !value states if the policy uses the parse result or not.
//
// The available policy holder are enumerated below:
//
// - empty_actor, nothing stored, feeds parse result
// - value_actor, 1 object stored by value, feeds value
// - ref_actor, 1 reference stored, feeds ref
// - ref_value_actor, 1 reference stored, feeds ref and parse result
//
// Doc. convention
//
// - ref is a reference to an object stored in a policy holder actor,
// - value_ref,value1_ref, value2_ref are a const reference stored in a
// policy holder actor,
// - value is the parse result in the single argument () operator,
// - first,last are the parse result in the two argument () operator
//
// Actors (generator functions) and quick description
//
// - assign_a(ref) assign parse result to ref
// - assign_a(ref, value_ref) assign value_ref to ref
// - increment_a(ref) increment ref
// - decrement_a(ref) decrement ref
// - push_back_a(ref) push back the parse result in ref
// - push_back_a(ref, value_ref) push back value_ref in ref
// - push_front_a(ref) push front the parse result in ref
// - push_front_a(ref, value_ref) push front value_ref in ref
// - insert_key_a(ref,value_ref) insert value_ref in ref using the
// parse result as key
// - insert_at_a(ref, key_ref) insert the parse result in ref at key_ref
// - insert_at_a(ref, key_ref insert value_ref in ref at key_ref
// , value_ref)
// - assign_key_a(ref, value_ref) assign value_ref in ref using the
// parse result as key
// - erase_a(ref, key) erase data at key from ref
// - clear_a(ref) clears ref
// - swap_a(aref, bref) swaps aref and bref
//
///////////////////////////////////////////////////////////////////////////////
#include <boost/spirit/home/classic/actor/ref_actor.hpp>
#include <boost/spirit/home/classic/actor/ref_value_actor.hpp>
#include <boost/spirit/home/classic/actor/ref_const_ref_actor.hpp>
#include <boost/spirit/home/classic/actor/ref_const_ref_value_actor.hpp>
#include <boost/spirit/home/classic/actor/ref_const_ref_const_ref_a.hpp>
#include <boost/spirit/home/classic/actor/assign_actor.hpp>
#include <boost/spirit/home/classic/actor/clear_actor.hpp>
#include <boost/spirit/home/classic/actor/increment_actor.hpp>
#include <boost/spirit/home/classic/actor/decrement_actor.hpp>
#include <boost/spirit/home/classic/actor/push_back_actor.hpp>
#include <boost/spirit/home/classic/actor/push_front_actor.hpp>
#include <boost/spirit/home/classic/actor/erase_actor.hpp>
#include <boost/spirit/home/classic/actor/insert_key_actor.hpp>
#include <boost/spirit/home/classic/actor/insert_at_actor.hpp>
#include <boost/spirit/home/classic/actor/assign_key_actor.hpp>
#include <boost/spirit/home/classic/actor/swap_actor.hpp>
#endif
