/usr/include/boost/spirit/home/karma/nonterminal
Edit: /usr/include/boost/spirit/home/karma/nonterminal/rule.hpp (15734B)
// 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
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#if defined(BOOST_MSVC)
# pragma warning(push)
# pragma warning(disable: 4127) // conditional expression is constant
# 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_type;
using spirit::_val_type;
using spirit::_a_type;
using spirit::_b_type;
using spirit::_c_type;
using spirit::_d_type;
using spirit::_e_type;
using spirit::_f_type;
using spirit::_g_type;
using spirit::_h_type;
using spirit::_i_type;
using spirit::_j_type;
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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;
#endif
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 const>
>::type
, rule
>
, generator >
{
typedef mpl::int_ properties;
typedef OutputIterator iterator_type;
typedef rule this_type;
typedef reference reference_;
typedef typename proto::terminal::type terminal;
typedef proto::extends base_type;
typedef mpl::vector template_params;
// the output iterator is always wrapped by karma
typedef detail::output_iterator
output_iterator;
// locals_type is a sequence of types to be used as local variables
typedef typename
spirit::detail::extract_locals::type
locals_type;
// The delimiter-generator type
typedef typename
spirit::detail::extract_component<
karma::domain, template_params>::type
delimiter_type;
// The rule's encoding type
typedef typename
spirit::detail::extract_encoding::type
encoding_type;
// The rule's signature
typedef typename
spirit::detail::extract_sig::type
sig_type;
// This is the rule's attribute type
typedef typename
spirit::detail::attr_from_sig::type
attr_type;
BOOST_STATIC_ASSERT_MSG(
!is_reference::value && !is_const::value,
"Const/reference qualifiers on Karma rule attribute are meaningless");
typedef attr_type const& attr_reference_type;
// parameter_types is a sequence of types passed as parameters to the rule
typedef typename
spirit::detail::params_from_sig::type
parameter_types;
static size_t const params_size =
fusion::result_of::size::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
, locals_type>
context_type;
typedef function<
bool(output_iterator&, context_type&, delimiter_type const&)>
function_type;
typedef typename
mpl::if_<
is_same
, unused_type
, tag::char_code
>::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
static void define(rule& /* lhs */, Expr const& /* expr */, mpl::false_)
{
// 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);
}
template
static void define(rule& lhs, Expr const& expr, mpl::true_)
{
lhs.f = detail::bind_generator(
compile(expr, encoding_modifier_type()));
}
template
rule (Expr const& expr, std::string const& name_ = "unnamed-rule")
: base_type(terminal::make(reference_(*this)))
, name_(name_)
{
define(*this, expr, traits::matches());
}
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
rule& operator=(Expr const& expr)
{
define(*this, expr, traits::matches());
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
friend rule& operator%=(rule& r, Expr const& expr)
{
define(r, expr, traits::matches());
return r;
}
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
// non-const version needed to suppress proto's %= kicking in
template
friend rule& operator%=(rule& r, Expr& expr)
{
return r %= static_cast(expr);
}
#else
// for rvalue references
template
friend rule& operator%=(rule& r, Expr&& expr)
{
define(r, expr, traits::matches());
return r;
}
#endif
#else
// both friend functions have to be defined out of class as VC7.1
// will complain otherwise
template
friend rule& operator%=(
rule&r, Expr const& expr);
// non-const version needed to suppress proto's %= kicking in
template
friend rule& operator%=(
rule& r, Expr& expr);
#endif
template
struct attribute
{
typedef attr_type type;
};
template
bool generate(output_iterator& sink, Context&, Delimiter const& delim
, Attribute const& attr) const
{
if (f)
{
// Create an attribute if none is supplied.
typedef traits::transform_attribute<
Attribute const, attr_type, domain>
transform;
typename transform::type attr_ = transform::pre(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::value)
karma::delimit_out(sink, delim);
return true;
}
}
return false;
}
template
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::transform_attribute<
Attribute const, attr_type, domain>
transform;
typename transform::type attr_ = transform::pre(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::value)
karma::delimit_out(sink, delim);
return true;
}
}
return false;
}
template
info what(Context& /*context*/) const
{
return info(name_);
}
reference_ alias() const
{
return reference_(*this);
}
typename proto::terminal::type copy() const
{
typename proto::terminal::type result = {*this};
return result;
}
// bring in the operator() overloads
rule const& get_parameterized_subject() const { return *this; }
typedef rule parameterized_subject_type;
#include
std::string name_;
function_type f;
};
#if BOOST_WORKAROUND(BOOST_MSVC, < 1400)
template
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);
typedef typename
rule::encoding_modifier_type
encoding_modifier_type;
r.f = detail::bind_generator(
compile(expr, encoding_modifier_type()));
return r;
}
// non-const version needed to suppress proto's %= kicking in
template
rule& operator%=(
rule& r, Expr& expr)
{
return r %= static_cast(expr);
}
#endif
}}}
namespace boost { namespace spirit { namespace traits
{
namespace detail
{
template
struct nonterminal_handles_container
: mpl::and_<
traits::is_container
, is_convertible >
{};
}
///////////////////////////////////////////////////////////////////////////
template <
typename IteratorA, typename IteratorB, typename Attribute
, typename Context, typename T1, typename T2, typename T3, typename T4>
struct handles_container<
karma::rule, Attribute, Context
, IteratorB>
: detail::nonterminal_handles_container<
typename attribute_of<
karma::rule
, Context, IteratorB
>::type, Attribute>
{};
}}}
#if defined(BOOST_MSVC)
# pragma warning(pop)
#endif
#endif