446 lines
15 KiB
C++
446 lines
15 KiB
C++
// Copyright (c) 2001-2011 Joel de Guzman
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// Copyright (c) 2001-2011 Hartmut Kaiser
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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_KARMA_RULE_MAR_05_2007_0455PM)
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#define BOOST_SPIRIT_KARMA_RULE_MAR_05_2007_0455PM
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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/assert.hpp>
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#include <boost/config.hpp>
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#include <boost/function.hpp>
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#include <boost/mpl/vector.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/fusion/include/vector.hpp>
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#include <boost/fusion/include/size.hpp>
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#include <boost/fusion/include/make_vector.hpp>
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#include <boost/fusion/include/cons.hpp>
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#include <boost/fusion/include/as_list.hpp>
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#include <boost/fusion/include/as_vector.hpp>
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#include <boost/spirit/home/support/unused.hpp>
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#include <boost/spirit/home/support/argument.hpp>
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#include <boost/spirit/home/support/context.hpp>
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#include <boost/spirit/home/support/info.hpp>
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#include <boost/spirit/home/karma/delimit_out.hpp>
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#include <boost/spirit/home/karma/detail/attributes.hpp>
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#include <boost/spirit/home/support/nonterminal/extract_param.hpp>
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#include <boost/spirit/home/support/nonterminal/locals.hpp>
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#include <boost/spirit/home/karma/reference.hpp>
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#include <boost/spirit/home/karma/detail/output_iterator.hpp>
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#include <boost/spirit/home/karma/nonterminal/nonterminal_fwd.hpp>
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#include <boost/spirit/home/karma/nonterminal/detail/generator_binder.hpp>
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#include <boost/spirit/home/karma/nonterminal/detail/parameterized.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/proto/extends.hpp>
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#include <boost/proto/traits.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/type_traits/is_reference.hpp>
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#if defined(BOOST_MSVC)
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# pragma warning(push)
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# pragma warning(disable: 4127) // conditional expression is constant
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# pragma warning(disable: 4355) // 'this' : used in base member initializer list warning
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#endif
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namespace boost { namespace spirit { namespace karma
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{
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BOOST_PP_REPEAT(SPIRIT_ATTRIBUTES_LIMIT, SPIRIT_USING_ATTRIBUTE, _)
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using spirit::_pass_type;
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using spirit::_val_type;
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using spirit::_a_type;
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using spirit::_b_type;
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using spirit::_c_type;
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using spirit::_d_type;
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using spirit::_e_type;
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using spirit::_f_type;
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using spirit::_g_type;
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using spirit::_h_type;
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using spirit::_i_type;
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using spirit::_j_type;
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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using spirit::_pass;
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using spirit::_val;
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using spirit::_a;
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using spirit::_b;
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using spirit::_c;
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using spirit::_d;
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using spirit::_e;
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using spirit::_f;
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using spirit::_g;
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using spirit::_h;
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using spirit::_i;
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using spirit::_j;
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#endif
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using spirit::info;
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using spirit::locals;
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template <
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typename OutputIterator, typename T1, typename T2, typename T3
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, typename T4>
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struct rule
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: proto::extends<
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typename proto::terminal<
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reference<rule<OutputIterator, T1, T2, T3, T4> const>
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>::type
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, rule<OutputIterator, T1, T2, T3, T4>
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>
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, generator<rule<OutputIterator, T1, T2, T3, T4> >
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{
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typedef mpl::int_<generator_properties::all_properties> properties;
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typedef OutputIterator iterator_type;
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typedef rule<OutputIterator, T1, T2, T3, T4> this_type;
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typedef reference<this_type const> reference_;
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typedef typename proto::terminal<reference_>::type terminal;
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typedef proto::extends<terminal, this_type> base_type;
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typedef mpl::vector<T1, T2, T3, T4> template_params;
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// the output iterator is always wrapped by karma
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typedef detail::output_iterator<OutputIterator, properties>
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output_iterator;
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// locals_type is a sequence of types to be used as local variables
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typedef typename
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spirit::detail::extract_locals<template_params>::type
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locals_type;
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// The delimiter-generator type
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typedef typename
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spirit::detail::extract_component<
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karma::domain, template_params>::type
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delimiter_type;
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// The rule's encoding type
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typedef typename
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spirit::detail::extract_encoding<template_params>::type
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encoding_type;
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// The rule's signature
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typedef typename
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spirit::detail::extract_sig<template_params, encoding_type, karma::domain>::type
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sig_type;
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// This is the rule's attribute type
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typedef typename
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spirit::detail::attr_from_sig<sig_type>::type
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attr_type;
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BOOST_STATIC_ASSERT_MSG(
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!is_reference<attr_type>::value && !is_const<attr_type>::value,
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"Const/reference qualifiers on Karma rule attribute are meaningless");
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typedef attr_type const& attr_reference_type;
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// parameter_types is a sequence of types passed as parameters to the rule
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typedef typename
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spirit::detail::params_from_sig<sig_type>::type
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parameter_types;
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static size_t const params_size =
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fusion::result_of::size<parameter_types>::type::value;
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// the context passed to the right hand side of a rule contains
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// the attribute and the parameters for this particular rule invocation
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typedef context<
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fusion::cons<attr_reference_type, parameter_types>
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, locals_type>
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context_type;
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typedef function<
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bool(output_iterator&, context_type&, delimiter_type const&)>
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function_type;
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typedef typename
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mpl::if_<
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is_same<encoding_type, unused_type>
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, unused_type
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, tag::char_code<tag::encoding, encoding_type>
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>::type
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encoding_modifier_type;
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explicit rule(std::string const& name_ = "unnamed-rule")
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: base_type(terminal::make(reference_(*this)))
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, name_(name_)
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{
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}
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rule(rule const& rhs)
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: base_type(terminal::make(reference_(*this)))
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, name_(rhs.name_)
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, f(rhs.f)
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{
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}
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template <typename Auto, typename Expr>
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static void define(rule& /* lhs */, Expr const& /* expr */, mpl::false_)
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{
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// Report invalid expression error as early as possible.
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// If you got an error_invalid_expression error message here,
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// then the expression (expr) is not a valid spirit karma expression.
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BOOST_SPIRIT_ASSERT_MATCH(karma::domain, Expr);
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}
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template <typename Auto, typename Expr>
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static void define(rule& lhs, Expr const& expr, mpl::true_)
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{
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lhs.f = detail::bind_generator<Auto>(
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compile<karma::domain>(expr, encoding_modifier_type()));
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}
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template <typename Expr>
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rule (Expr const& expr, std::string const& name_ = "unnamed-rule")
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: base_type(terminal::make(reference_(*this)))
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, name_(name_)
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{
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define<mpl::false_>(*this, expr, traits::matches<karma::domain, Expr>());
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}
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rule& operator=(rule const& rhs)
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{
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// The following assertion fires when you try to initialize a rule
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// from an uninitialized one. Did you mean to refer to the right
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// hand side rule instead of assigning from it? In this case you
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// should write lhs = rhs.alias();
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BOOST_ASSERT(rhs.f && "Did you mean rhs.alias() instead of rhs?");
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f = rhs.f;
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name_ = rhs.name_;
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return *this;
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}
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std::string const& name() const
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{
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return name_;
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}
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void name(std::string const& str)
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{
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name_ = str;
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}
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template <typename Expr>
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rule& operator=(Expr const& expr)
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{
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define<mpl::false_>(*this, expr, traits::matches<karma::domain, Expr>());
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return *this;
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}
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// VC7.1 has problems to resolve 'rule' without explicit template parameters
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#if !BOOST_WORKAROUND(BOOST_MSVC, < 1400)
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// g++ 3.3 barfs if this is a member function :(
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template <typename Expr>
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friend rule& operator%=(rule& r, Expr const& expr)
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{
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define<mpl::true_>(r, expr, traits::matches<karma::domain, Expr>());
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return r;
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}
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#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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// non-const version needed to suppress proto's %= kicking in
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template <typename Expr>
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friend rule& operator%=(rule& r, Expr& expr)
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{
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return r %= static_cast<Expr const&>(expr);
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}
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#else
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// for rvalue references
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template <typename Expr>
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friend rule& operator%=(rule& r, Expr&& expr)
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{
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define<mpl::true_>(r, expr, traits::matches<karma::domain, Expr>());
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return r;
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}
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#endif
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#else
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// both friend functions have to be defined out of class as VC7.1
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// will complain otherwise
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template <typename OutputIterator_, typename T1_, typename T2_
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, typename T3_, typename T4_, typename Expr>
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friend rule<OutputIterator_, T1_, T2_, T3_, T4_>& operator%=(
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rule<OutputIterator_, T1_, T2_, T3_, T4_>&r, Expr const& expr);
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// non-const version needed to suppress proto's %= kicking in
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template <typename OutputIterator_, typename T1_, typename T2_
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, typename T3_, typename T4_, typename Expr>
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friend rule<OutputIterator_, T1_, T2_, T3_, T4_>& operator%=(
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rule<OutputIterator_, T1_, T2_, T3_, T4_>& r, Expr& expr);
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#endif
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template <typename Context, typename Unused>
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struct attribute
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{
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typedef attr_type type;
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};
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template <typename Context, typename Delimiter, typename Attribute>
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bool generate(output_iterator& sink, Context&, Delimiter const& delim
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, Attribute const& attr) const
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{
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if (f)
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{
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// Create an attribute if none is supplied.
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typedef traits::transform_attribute<
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Attribute const, attr_type, domain>
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transform;
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typename transform::type attr_ = transform::pre(attr);
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// If you are seeing a compilation error here, you are probably
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// trying to use a rule or a grammar which has inherited
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// attributes, without passing values for them.
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context_type context(attr_);
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// If you are seeing a compilation error here stating that the
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// third parameter can't be converted to a karma::reference
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// then you are probably trying to use a rule or a grammar with
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// an incompatible delimiter type.
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if (f(sink, context, delim))
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{
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// do a post-delimit if this is an implied verbatim
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if (is_same<delimiter_type, unused_type>::value)
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karma::delimit_out(sink, delim);
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return true;
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}
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}
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return false;
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}
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template <typename Context, typename Delimiter, typename Attribute
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, typename Params>
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bool generate(output_iterator& sink, Context& caller_context
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, Delimiter const& delim, Attribute const& attr
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, Params const& params) const
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{
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if (f)
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{
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// Create an attribute if none is supplied.
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typedef traits::transform_attribute<
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Attribute const, attr_type, domain>
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transform;
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typename transform::type attr_ = transform::pre(attr);
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// If you are seeing a compilation error here, you are probably
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// trying to use a rule or a grammar which has inherited
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// attributes, passing values of incompatible types for them.
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context_type context(attr_, params, caller_context);
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// If you are seeing a compilation error here stating that the
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// third parameter can't be converted to a karma::reference
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// then you are probably trying to use a rule or a grammar with
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// an incompatible delimiter type.
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if (f(sink, context, delim))
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{
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// do a post-delimit if this is an implied verbatim
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if (is_same<delimiter_type, unused_type>::value)
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karma::delimit_out(sink, delim);
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return true;
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}
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}
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return false;
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}
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template <typename Context>
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info what(Context& /*context*/) const
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{
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return info(name_);
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}
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reference_ alias() const
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{
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return reference_(*this);
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}
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typename proto::terminal<this_type>::type copy() const
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{
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typename proto::terminal<this_type>::type result = {*this};
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return result;
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}
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// bring in the operator() overloads
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rule const& get_parameterized_subject() const { return *this; }
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typedef rule parameterized_subject_type;
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#include <boost/spirit/home/karma/nonterminal/detail/fcall.hpp>
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std::string name_;
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function_type f;
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};
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1400)
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template <typename OutputIterator_, typename T1_, typename T2_
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, typename T3_, typename T4_, typename Expr>
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rule<OutputIterator_, T1_, T2_, T3_, T4_>& operator%=(
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rule<OutputIterator_, T1_, T2_, T3_, T4_>&r, Expr const& expr)
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{
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// Report invalid expression error as early as possible.
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// If you got an error_invalid_expression error message here, then
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// the expression (expr) is not a valid spirit karma expression.
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BOOST_SPIRIT_ASSERT_MATCH(karma::domain, Expr);
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typedef typename
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rule<OutputIterator_, T1_, T2_, T3_, T4_>::encoding_modifier_type
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encoding_modifier_type;
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r.f = detail::bind_generator<mpl::true_>(
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compile<karma::domain>(expr, encoding_modifier_type()));
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return r;
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}
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// non-const version needed to suppress proto's %= kicking in
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template <typename OutputIterator_, typename T1_, typename T2_
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, typename T3_, typename T4_, typename Expr>
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rule<OutputIterator_, T1_, T2_, T3_, T4_>& operator%=(
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rule<OutputIterator_, T1_, T2_, T3_, T4_>& r, Expr& expr)
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{
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return r %= static_cast<Expr const&>(expr);
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}
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#endif
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}}}
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namespace boost { namespace spirit { namespace traits
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{
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namespace detail
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{
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template <typename RuleAttribute, typename Attribute>
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struct nonterminal_handles_container
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: mpl::and_<
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traits::is_container<RuleAttribute>
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, is_convertible<Attribute, RuleAttribute> >
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{};
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}
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///////////////////////////////////////////////////////////////////////////
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template <
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typename IteratorA, typename IteratorB, typename Attribute
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, typename Context, typename T1, typename T2, typename T3, typename T4>
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struct handles_container<
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karma::rule<IteratorA, T1, T2, T3, T4>, Attribute, Context
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, IteratorB>
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: detail::nonterminal_handles_container<
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typename attribute_of<
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karma::rule<IteratorA, T1, T2, T3, T4>
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, Context, IteratorB
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>::type, Attribute>
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{};
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}}}
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#if defined(BOOST_MSVC)
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# pragma warning(pop)
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#endif
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#endif
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