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159 lines
4.5 KiB
159 lines
4.5 KiB
// Copyright (c) 2001-2011 Hartmut Kaiser |
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// Copyright (c) 2001-2011 Joel de Guzman |
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// |
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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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#if !defined(BOOST_SPIRIT_GENERATOR_JANUARY_13_2009_1002AM) |
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#define BOOST_SPIRIT_GENERATOR_JANUARY_13_2009_1002AM |
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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/mpl/has_xxx.hpp> |
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#include <boost/mpl/int.hpp> |
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#include <boost/spirit/home/karma/domain.hpp> |
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namespace boost { namespace spirit { namespace karma |
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{ |
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struct generator_properties |
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{ |
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enum enum_type { |
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no_properties = 0, |
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buffering = 0x01, // generator requires buffering |
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counting = 0x02, // generator requires counting |
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tracking = 0x04, // generator requires position tracking |
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disabling = 0x08, // generator requires disabling of output |
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countingbuffer = 0x03, // buffering | counting |
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all_properties = 0x0f // buffering | counting | tracking | disabling |
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}; |
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}; |
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template <typename Derived> |
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struct generator |
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{ |
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struct generator_id; |
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typedef mpl::int_<generator_properties::no_properties> properties; |
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typedef Derived derived_type; |
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typedef karma::domain domain; |
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// Requirement: g.generate(o, context, delimiter, attr) -> bool |
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// |
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// g: a generator |
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// o: output iterator |
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// context: enclosing rule context (can be unused_type) |
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// delimit: delimiter (can be unused_type) |
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// attr: attribute (can be unused_type) |
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// Requirement: g.what(context) -> info |
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// |
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// g: a generator |
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// context: enclosing rule context (can be unused_type) |
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// Requirement: G::template attribute<Ctx, Iter>::type |
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// |
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// G: a generator type |
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// Ctx: A context type (can be unused_type) |
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// Iter: An iterator type (always unused_type) |
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Derived const& derived() const |
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{ |
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return *static_cast<Derived const*>(this); |
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} |
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}; |
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template <typename Derived> |
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struct primitive_generator : generator<Derived> |
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{ |
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struct primitive_generator_id; |
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}; |
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template <typename Derived> |
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struct nary_generator : generator<Derived> |
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{ |
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struct nary_generator_id; |
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// Requirement: g.elements -> fusion sequence |
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// |
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// g: a composite generator |
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// Requirement: G::elements_type -> fusion sequence |
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// |
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// G: a composite generator type |
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}; |
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template <typename Derived> |
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struct unary_generator : generator<Derived> |
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{ |
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struct unary_generator_id; |
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// Requirement: g.subject -> subject generator |
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// |
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// g: a unary generator |
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// Requirement: G::subject_type -> subject generator type |
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// |
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// G: a unary generator type |
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}; |
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template <typename Derived> |
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struct binary_generator : generator<Derived> |
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{ |
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struct binary_generator_id; |
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// Requirement: g.left -> left generator |
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// |
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// g: a binary generator |
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// Requirement: G::left_type -> left generator type |
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// |
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// G: a binary generator type |
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// Requirement: g.right -> right generator |
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// |
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// g: a binary generator |
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// Requirement: G::right_type -> right generator type |
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// |
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// G: a binary generator type |
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}; |
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}}} |
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namespace boost { namespace spirit { namespace traits // classification |
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{ |
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namespace detail |
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{ |
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// generator tags |
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BOOST_MPL_HAS_XXX_TRAIT_DEF(generator_id) |
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BOOST_MPL_HAS_XXX_TRAIT_DEF(primitive_generator_id) |
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BOOST_MPL_HAS_XXX_TRAIT_DEF(nary_generator_id) |
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BOOST_MPL_HAS_XXX_TRAIT_DEF(unary_generator_id) |
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BOOST_MPL_HAS_XXX_TRAIT_DEF(binary_generator_id) |
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} |
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// check for generator tags |
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template <typename T> |
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struct is_generator : detail::has_generator_id<T> {}; |
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template <typename T> |
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struct is_primitive_generator : detail::has_primitive_generator_id<T> {}; |
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template <typename T> |
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struct is_nary_generator : detail::has_nary_generator_id<T> {}; |
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template <typename T> |
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struct is_unary_generator : detail::has_unary_generator_id<T> {}; |
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template <typename T> |
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struct is_binary_generator : detail::has_binary_generator_id<T> {}; |
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// check for generator properties |
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template <typename T> |
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struct properties_of : T::properties {}; |
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}}} |
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#endif
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