295 lines
12 KiB
C++
295 lines
12 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Hartmut Kaiser
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2010 Bryce Lelbach
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_SPIRIT_ATTRIBUTES_FWD_OCT_01_2009_0715AM)
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#define BOOST_SPIRIT_ATTRIBUTES_FWD_OCT_01_2009_0715AM
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp>
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#if (defined(__GNUC__) && (__GNUC__ < 4)) || \
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(defined(__APPLE__) && defined(__INTEL_COMPILER))
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#include <boost/utility/enable_if.hpp>
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#endif
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#include <boost/spirit/home/support/unused.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace result_of
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{
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// forward declaration only
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template <typename Exposed, typename Attribute>
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struct extract_from;
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template <typename T, typename Attribute>
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struct attribute_as;
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template <typename T>
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struct optional_value;
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template <typename Container>
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struct begin;
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template <typename Container>
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struct end;
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template <typename Iterator>
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struct deref;
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}}}
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace traits
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{
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///////////////////////////////////////////////////////////////////////////
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// Find out if T can be a strong substitute for Expected attribute
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Expected, typename Enable = void>
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struct is_substitute;
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///////////////////////////////////////////////////////////////////////////
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// Find out if T can be a weak substitute for Expected attribute
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Expected, typename Enable = void>
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struct is_weak_substitute;
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///////////////////////////////////////////////////////////////////////////
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// Determine if T is a proxy
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Enable = void>
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struct is_proxy;
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///////////////////////////////////////////////////////////////////////////
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// Retrieve the attribute type to use from the given type
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//
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// This is needed to extract the correct attribute type from proxy classes
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// as utilized in FUSION_ADAPT_ADT et. al.
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///////////////////////////////////////////////////////////////////////////
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template <typename Attribute, typename Enable = void>
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struct attribute_type;
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///////////////////////////////////////////////////////////////////////////
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// Retrieve the size of a fusion sequence (compile time)
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///////////////////////////////////////////////////////////////////////////
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template <typename T>
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struct sequence_size;
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///////////////////////////////////////////////////////////////////////////
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// Retrieve the size of an attribute (runtime)
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///////////////////////////////////////////////////////////////////////////
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template <typename Attribute, typename Enable = void>
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struct attribute_size;
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template <typename Attribute>
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typename attribute_size<Attribute>::type
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size(Attribute const& attr);
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///////////////////////////////////////////////////////////////////////////
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// Determines how we pass attributes to semantic actions. This
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// may be specialized. By default, all attributes are wrapped in
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// a fusion sequence, because the attribute has to be treated as being
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// a single value in any case (even if it actually already is a fusion
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// sequence in its own).
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///////////////////////////////////////////////////////////////////////////
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template <typename Component, typename Attribute, typename Enable = void>
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struct pass_attribute;
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Enable = void>
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struct optional_attribute;
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///////////////////////////////////////////////////////////////////////////
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// Sometimes the user needs to transform the attribute types for certain
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// attributes. This template can be used as a customization point, where
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// the user is able specify specific transformation rules for any attribute
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// type.
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///////////////////////////////////////////////////////////////////////////
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template <typename Exposed, typename Transformed, typename Domain
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, typename Enable = void>
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struct transform_attribute;
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///////////////////////////////////////////////////////////////////////////
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// Qi only
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template <typename Attribute, typename Iterator, typename Enable = void>
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struct assign_to_attribute_from_iterators;
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template <typename Iterator, typename Attribute>
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void assign_to(Iterator const& first, Iterator const& last, Attribute& attr);
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template <typename Iterator>
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void assign_to(Iterator const&, Iterator const&, unused_type);
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template <typename Attribute, typename T, typename Enable = void>
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struct assign_to_attribute_from_value;
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template <typename Attribute, typename T, typename Enable = void>
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struct assign_to_container_from_value;
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template <typename T, typename Attribute>
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void assign_to(T const& val, Attribute& attr);
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template <typename T>
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void assign_to(T const&, unused_type);
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///////////////////////////////////////////////////////////////////////////
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// Karma only
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template <typename Attribute, typename Exposed, typename Enable = void>
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struct extract_from_attribute;
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template <typename Attribute, typename Exposed, typename Enable = void>
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struct extract_from_container;
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template <typename Exposed, typename Attribute, typename Context>
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typename spirit::result_of::extract_from<Exposed, Attribute>::type
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extract_from(Attribute const& attr, Context& ctx
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#if (defined(__GNUC__) && (__GNUC__ < 4)) || \
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(defined(__APPLE__) && defined(__INTEL_COMPILER))
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, typename enable_if<traits::not_is_unused<Attribute> >::type* = NULL
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#endif
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);
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///////////////////////////////////////////////////////////////////////////
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// Karma only
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template <typename T, typename Attribute, typename Enable = void>
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struct attribute_as;
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template <typename T, typename Attribute>
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typename spirit::result_of::attribute_as<T, Attribute>::type
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as(Attribute const& attr);
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template <typename T, typename Attribute>
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bool valid_as(Attribute const& attr);
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///////////////////////////////////////////////////////////////////////////
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// return the type currently stored in the given variant
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Enable = void>
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struct variant_which;
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template <typename T>
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int which(T const& v);
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///////////////////////////////////////////////////////////////////////////
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// Determine, whether T is a variant like type
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Domain = unused_type, typename Enable = void>
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struct not_is_variant;
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///////////////////////////////////////////////////////////////////////////
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// Determine, whether T is a variant like type
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Domain = unused_type, typename Enable = void>
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struct not_is_optional;
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///////////////////////////////////////////////////////////////////////////
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// Clear data efficiently
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Enable = void>
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struct clear_value;
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///////////////////////////////////////////////////////////////////////
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// Determine the value type of the given container type
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///////////////////////////////////////////////////////////////////////
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template <typename Container, typename Enable = void>
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struct container_value;
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template <typename Container, typename Enable = void>
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struct container_iterator;
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template <typename T, typename Enable = void>
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struct is_container;
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template <typename T, typename Enable = void>
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struct is_iterator_range;
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Attribute, typename Context = unused_type
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, typename Iterator = unused_type, typename Enable = void>
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struct handles_container;
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template <typename Container, typename ValueType, typename Attribute
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, typename Sequence, typename Domain, typename Enable = void>
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struct pass_through_container;
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///////////////////////////////////////////////////////////////////////////
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// Qi only
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template <typename Container, typename T, typename Enable = void>
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struct push_back_container;
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template <typename Container, typename Enable = void>
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struct is_empty_container;
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template <typename Container, typename Enable = void>
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struct make_container_attribute;
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///////////////////////////////////////////////////////////////////////
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// Determine the iterator type of the given container type
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// Karma only
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///////////////////////////////////////////////////////////////////////
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template <typename Container, typename Enable = void>
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struct begin_container;
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template <typename Container, typename Enable = void>
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struct end_container;
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template <typename Iterator, typename Enable = void>
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struct deref_iterator;
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template <typename Iterator, typename Enable = void>
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struct next_iterator;
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template <typename Iterator, typename Enable = void>
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struct compare_iterators;
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///////////////////////////////////////////////////////////////////////////
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// Print the given attribute of type T to the stream given as Out
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///////////////////////////////////////////////////////////////////////////
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template <typename Out, typename T, typename Enable = void>
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struct print_attribute_debug;
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template <typename Out, typename T>
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void print_attribute(Out&, T const&);
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template <typename Out>
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void print_attribute(Out&, unused_type);
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///////////////////////////////////////////////////////////////////////////
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template <typename Char, typename Enable = void>
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struct token_printer_debug;
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template<typename Out, typename T>
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void print_token(Out&, T const&);
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///////////////////////////////////////////////////////////////////////////
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// Access attributes from a karma symbol table
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///////////////////////////////////////////////////////////////////////////
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template <typename T, typename Attribute, typename Enable = void>
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struct symbols_lookup;
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template <typename Attribute, typename T, typename Enable = void>
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struct symbols_value;
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///////////////////////////////////////////////////////////////////////////
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// transform attribute types exposed from compound operator components
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///////////////////////////////////////////////////////////////////////////
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template <typename Attribute, typename Domain>
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struct alternative_attribute_transform;
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template <typename Attribute, typename Domain>
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struct sequence_attribute_transform;
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template <typename Attribute, typename Domain>
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struct permutation_attribute_transform;
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template <typename Attribute, typename Domain>
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struct sequential_or_attribute_transform;
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}}}
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#endif
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