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