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Diffstat (limited to 'boost/parameter/aux_/preprocessor/impl/function_dispatch_layer.hpp')
| -rw-r--r-- | boost/parameter/aux_/preprocessor/impl/function_dispatch_layer.hpp | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/boost/parameter/aux_/preprocessor/impl/function_dispatch_layer.hpp b/boost/parameter/aux_/preprocessor/impl/function_dispatch_layer.hpp new file mode 100644 index 0000000000..3c240d527c --- /dev/null +++ b/boost/parameter/aux_/preprocessor/impl/function_dispatch_layer.hpp @@ -0,0 +1,474 @@ +// Copyright Daniel Wallin 2006. +// Copyright Cromwell D. Enage 2017. +// 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) + +#ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_FUNCTION_DISPATCH_LAYER_HPP +#define BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_FUNCTION_DISPATCH_LAYER_HPP + +#include <boost/preprocessor/cat.hpp> + +// Expands to keyword_tag_type for some keyword_tag. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_TYPE(keyword_tag) \ + BOOST_PP_CAT(keyword_tag, _type) +/**/ + +// Expands to a template parameter for each dispatch function. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_TEMPLATE_ARG(r, macro, arg) \ + , typename BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_TYPE(macro(arg)) +/**/ + +#include <boost/parameter/config.hpp> + +#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) + +// Expands to a forwarding parameter for a dispatch function. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_DEFN(r, macro, arg) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_TYPE(macro(arg))&& macro(arg) +/**/ + +#include <utility> + +// Expands to an argument passed from one dispatch function to the next. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_FWD(r, macro, arg) \ + , ::std::forward< \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_TYPE(macro(arg)) \ + >(macro(arg)) +/**/ + +#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) + +// Expands to a forwarding parameter for a dispatch function. The parameter +// type stores its const-ness. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_DEFN(r, macro, arg) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_TYPE(macro(arg))& macro(arg) +/**/ + +#include <boost/parameter/aux_/as_lvalue.hpp> + +// Expands to an argument passed from one dispatch function to the next. +// Explicit forwarding takes the form of forcing the argument to be an lvalue. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_FWD(r, macro, arg) \ + , ::boost::parameter::aux::as_lvalue(macro(arg)) +/**/ + +#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING + +#include <boost/parameter/aux_/preprocessor/impl/argument_specs.hpp> +#include <boost/parameter/aux_/preprocessor/impl/split_args.hpp> +#include <boost/preprocessor/seq/for_each.hpp> +#include <boost/preprocessor/seq/first_n.hpp> + +// Iterates through all required arguments and the first n optional arguments, +// passing each argument to the specified macro. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_REPEAT(macro, n, split_args) \ + BOOST_PP_SEQ_FOR_EACH( \ + macro \ + , BOOST_PARAMETER_FN_ARG_NAME \ + , BOOST_PARAMETER_SPLIT_ARG_REQ_SEQ(split_args) \ + ) \ + BOOST_PP_SEQ_FOR_EACH( \ + macro \ + , BOOST_PARAMETER_FN_ARG_NAME \ + , BOOST_PP_SEQ_FIRST_N( \ + n, BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ(split_args) \ + ) \ + ) +/**/ + +#include <boost/parameter/aux_/preprocessor/impl/function_dispatch_tuple.hpp> +#include <boost/parameter/aux_/preprocessor/impl/function_name.hpp> +#include <boost/preprocessor/control/if.hpp> + +// Produces a name for the dispatch functions. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_NAME(x, n) \ + BOOST_PP_CAT( \ + BOOST_PP_CAT( \ + BOOST_PP_IF( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_IS_CONST(x) \ + , boost_param_dispatch_const_ \ + , boost_param_dispatch_ \ + ) \ + , BOOST_PP_CAT(BOOST_PP_CAT(n, boost_), __LINE__) \ + ) \ + , BOOST_PARAMETER_MEMBER_FUNCTION_NAME( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_BASE_NAME(x) \ + ) \ + ) +/**/ + +// Expands to the template parameter list of the dispatch function with all +// required and first n optional parameters; also extracts the static keyword +// if present. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL(n, x) \ + template < \ + typename ResultType, typename Args \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_REPEAT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_TEMPLATE_ARG \ + , n \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + > BOOST_PARAMETER_MEMBER_FUNCTION_STATIC( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_BASE_NAME(x) \ + ) +/**/ + +#include <boost/parameter/aux_/use_default_tag.hpp> +#include <boost/preprocessor/control/expr_if.hpp> +#include <boost/preprocessor/punctuation/comma_if.hpp> + +// Expands to the result type, name, parenthesized list of all required and +// n optional parameters, and const-ness of the dispatch function; the bit +// value b determines whether or not this dispatch function takes in +// boost::parameter::aux::use_default_tag as its last parameter. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN(n, x, b1, b2) \ + ResultType BOOST_PARAMETER_FUNCTION_DISPATCH_NAME(x, b1)( \ + ResultType(*)(), Args const& args, long \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_REPEAT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_DEFN \ + , n \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + BOOST_PP_COMMA_IF(b2) \ + BOOST_PP_EXPR_IF(b2, ::boost::parameter::aux::use_default_tag) \ + ) BOOST_PP_EXPR_IF(BOOST_PARAMETER_FUNCTION_DISPATCH_IS_CONST(x), const) +/**/ + +// Expands to a forward declaration of the dispatch function that takes in +// all required and the first n optional parameters, but not +// boost::parameter::aux::use_default_tag. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_FWD_DECL_0_Z(z, n, x) \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL(n, x) \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN(n, x, 0, 0); +/**/ + +// Expands to a forward declaration of the dispatch function that takes in +// all required parameters, the first n optional parameters, and +// boost::parameter::aux::use_default_tag. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_FWD_DECL_1_Z(z, n, x) \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL(n, x) \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN(n, x, 0, 1); +/**/ + +#include <boost/preprocessor/seq/elem.hpp> + +// Expands to the default value of the (n + 1)th optional parameter. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_DEFAULT_AUX(n, s_args) \ + BOOST_PARAMETER_FN_ARG_DEFAULT( \ + BOOST_PP_SEQ_ELEM(n, BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ(s_args)) \ + ) +/**/ + +#include <boost/parameter/keyword.hpp> + +// Expands to the assignment portion which binds the default value to the +// (n + 1)th optional parameter before composing it with the argument-pack +// parameter passed in to the n-th dispatch function. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_DEFAULT(n, s_args, tag_ns) \ + ::boost::parameter::keyword< \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME( \ + BOOST_PP_SEQ_ELEM(n, BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ(s_args)) \ + ) \ + >::instance = BOOST_PARAMETER_FUNCTION_DISPATCH_DEFAULT_AUX(n, s_args) +/**/ + +#include <boost/parameter/aux_/preprocessor/impl/function_cast.hpp> + +// Takes in the arg tuple (name, pred) and the tag namespace. +// Extracts the corresponding required argument from the pack. +// This form enables BOOST_PARAMETER_FUNCTION_DISPATCH_LAYER to use it +// from within BOOST_PP_SEQ_FOR_EACH. +#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) +// The boost::parameter::aux::forward wrapper is necessary to transmit the +// target type to the next dispatch function. Otherwise, the argument will +// retain its original type. -- Cromwell D. Enage +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_CAST_R(r, tag_ns, arg) \ + , ::boost::parameter::aux::forward< \ + BOOST_PARAMETER_FUNCTION_CAST_T( \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + , BOOST_PARAMETER_FN_ARG_PRED(arg) \ + , Args \ + ) \ + , BOOST_PARAMETER_FUNCTION_CAST_B( \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + , BOOST_PARAMETER_FN_ARG_PRED(arg) \ + , Args \ + ) \ + >( \ + args[ \ + ::boost::parameter::keyword< \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + >::instance \ + ] \ + ) +/**/ +#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) +// The explicit type cast is necessary to transmit the target type to the next +// dispatch function. Otherwise, the argument will retain its original type. +// -- Cromwell D. Enage +#define BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_CAST_R(r, tag_ns, arg) \ + , BOOST_PARAMETER_FUNCTION_CAST_T( \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + , BOOST_PARAMETER_FN_ARG_PRED(arg) \ + , Args \ + )( \ + args[ \ + ::boost::parameter::keyword< \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + >::instance \ + ] \ + ) +/**/ +#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING + +// Takes in the arg tuple (name, pred, default) and the tag namespace. +// Extracts the corresponding optional argument from the pack if specified, +// otherwise temporarily passes use_default_tag() to the dispatch functions. +#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) +// The boost::parameter::aux::forward wrapper is necessary to transmit the +// target type to the next dispatch function. Otherwise, the argument will +// retain its original type. -- Cromwell D. Enage +#define BOOST_PARAMETER_FUNCTION_DISPATCH_OPT_ARG_CAST(arg, tag_ns) \ + ::boost::parameter::aux::forward< \ + BOOST_PARAMETER_FUNCTION_CAST_T( \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + , BOOST_PARAMETER_FN_ARG_PRED(arg) \ + , Args \ + ) \ + , BOOST_PARAMETER_FUNCTION_CAST_B( \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + , BOOST_PARAMETER_FN_ARG_PRED(arg) \ + , Args \ + ) \ + >( \ + args[ \ + ::boost::parameter::keyword< \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + >::instance || ::boost::parameter::aux::use_default_tag() \ + ] \ + ) +/**/ +#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) +#define BOOST_PARAMETER_FUNCTION_DISPATCH_OPT_ARG_CAST(arg, tag_ns) \ + BOOST_PARAMETER_FUNCTION_CAST_B( \ + args[ \ + ::boost::parameter::keyword< \ + tag_ns::BOOST_PARAMETER_FN_ARG_NAME(arg) \ + >::instance || ::boost::parameter::aux::use_default_tag() \ + ] \ + , BOOST_PARAMETER_FN_ARG_PRED(arg) \ + , Args \ + ) +/**/ +#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING + +#include <boost/parameter/aux_/preprocessor/nullptr.hpp> + +// Expands to three dispatch functions that take in all required parameters +// and the first n optional parameters. The third dispatch function bears +// the same name as the first but takes in use_default_tag as the last +// parameter. The second dispatch function bears a different name from the +// other two. +// +// x is a tuple: +// +// (name, split_args, is_const, tag_namespace) +// +// Where name is the base name of the functions, and split_args is a tuple: +// +// (required_count, required_args, optional_count, required_args) +// +// The first dispatch function queries args if it has bound the (n + 1)th +// optional parameter to a user-defined argument. If so, then it forwards +// its own arguments followed by the user-defined argument to the dispatch +// function that takes in all required parameters and the first (n + 1) +// optional parameters, but not use_default_tag. Otherwise, it forwards +// its own arguments to the third dispatch function. +// +// The third dispatch function appends the default value of the (n + 1)th +// optional parameter to its copy of args. Then it forwards this copy, all +// required parameters, and the first n (not n + 1) optional parameters to +// the second dispatch function. +// +// The second dispatch function forwards its arguments, then the (n + 1)th +// optional parameter that it extracts from args, to the other-named dispatch +// function that takes in all required parameters and the first (n + 1) +// optional parameters, but not use_default_tag. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_OVERLOAD_Z(z, n, x) \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL(n, x) \ + inline BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN(n, x, 0, 0) \ + { \ + return BOOST_PP_EXPR_IF( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_IS_MEMBER(x) \ + , this-> \ + ) BOOST_PARAMETER_FUNCTION_DISPATCH_NAME(x, 0)( \ + static_cast<ResultType(*)()>(BOOST_PARAMETER_AUX_PP_NULLPTR) \ + , args \ + , 0L \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_REPEAT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_FWD \ + , n \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_OPT_ARG_CAST( \ + BOOST_PP_SEQ_ELEM( \ + n \ + , BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + ) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_TAG_NAMESPACE(x) \ + ) \ + ); \ + } \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL(n, x) \ + inline BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN(n, x, 1, 0) \ + { \ + return BOOST_PP_EXPR_IF( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_IS_MEMBER(x) \ + , this-> \ + ) BOOST_PARAMETER_FUNCTION_DISPATCH_NAME(x, 0)( \ + static_cast<ResultType(*)()>(BOOST_PARAMETER_AUX_PP_NULLPTR) \ + , args \ + , 0L \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_REPEAT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_FWD \ + , n \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + , args[ \ + ::boost::parameter::keyword< \ + BOOST_PARAMETER_FUNCTION_DISPATCH_TAG_NAMESPACE(x):: \ + BOOST_PARAMETER_FN_ARG_NAME( \ + BOOST_PP_SEQ_ELEM( \ + n \ + , BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + ) \ + ) \ + >::instance \ + ] \ + ); \ + } \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL(n, x) \ + inline BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN(n, x, 0, 1) \ + { \ + return BOOST_PP_EXPR_IF( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_IS_MEMBER(x) \ + , this-> \ + ) BOOST_PARAMETER_FUNCTION_DISPATCH_NAME(x, 1)( \ + static_cast<ResultType(*)()>(BOOST_PARAMETER_AUX_PP_NULLPTR) \ + , (args \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_DEFAULT( \ + n \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_TAG_NAMESPACE(x) \ + ) \ + ) \ + , 0L \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_REPEAT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_FWD \ + , n \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + ); \ + } +/**/ + +#include <boost/preprocessor/arithmetic/inc.hpp> +#include <boost/preprocessor/control/if.hpp> +#include <boost/preprocessor/repetition/repeat_from_to.hpp> +#include <boost/preprocessor/tuple/eat.hpp> + +// x is a tuple: +// +// (base_name, split_args, is_member, is_const, tag_namespace) +// +// Generates all dispatch functions for the function named base_name. Each +// dispatch function that takes in n optional parameters passes the default +// value of the (n + 1)th optional parameter to the next dispatch function. +// The last dispatch function is the back-end implementation, so only the +// header is generated: the user is expected to supply the body. +// +// Also generates the front-end implementation function, which uses +// BOOST_PARAMETER_FUNCTION_CAST to extract each argument from the argument +// pack. +#define BOOST_PARAMETER_FUNCTION_DISPATCH_LAYER(fwd_decl, x) \ + BOOST_PP_IF(fwd_decl, BOOST_PP_REPEAT_FROM_TO, BOOST_PP_TUPLE_EAT(4))( \ + 0 \ + , BOOST_PP_INC( \ + BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + ) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_FWD_DECL_0_Z \ + , x \ + ) \ + BOOST_PP_IF(fwd_decl, BOOST_PP_REPEAT_FROM_TO, BOOST_PP_TUPLE_EAT(4))( \ + 0 \ + , BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_FWD_DECL_1_Z \ + , x \ + ) \ + template <typename Args> BOOST_PARAMETER_MEMBER_FUNCTION_STATIC( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_BASE_NAME(x) \ + ) inline typename BOOST_PARAMETER_FUNCTION_RESULT_NAME( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_BASE_NAME(x) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_IS_CONST(x) \ + )<Args>::type BOOST_PARAMETER_FUNCTION_IMPL_NAME( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_BASE_NAME(x) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_IS_CONST(x) \ + )(Args const& args) \ + BOOST_PP_EXPR_IF(BOOST_PARAMETER_FUNCTION_DISPATCH_IS_CONST(x), const) \ + { \ + return BOOST_PP_EXPR_IF( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_IS_MEMBER(x) \ + , this-> \ + ) BOOST_PARAMETER_FUNCTION_DISPATCH_NAME(x, 0)( \ + static_cast< \ + typename BOOST_PARAMETER_FUNCTION_RESULT_NAME( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_BASE_NAME(x) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_IS_CONST(x) \ + )<Args>::type(*)() \ + >(BOOST_PARAMETER_AUX_PP_NULLPTR) \ + , args \ + , 0L \ + BOOST_PP_SEQ_FOR_EACH( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_ARG_CAST_R \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_TAG_NAMESPACE(x) \ + , BOOST_PARAMETER_SPLIT_ARG_REQ_SEQ( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + ) \ + ); \ + } \ + BOOST_PP_REPEAT_FROM_TO( \ + 0 \ + , BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + , BOOST_PARAMETER_FUNCTION_DISPATCH_OVERLOAD_Z \ + , x \ + ) \ + BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_TPL( \ + BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + , x \ + ) \ + inline BOOST_PARAMETER_FUNCTION_DISPATCH_HEAD_PRN( \ + BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT( \ + BOOST_PARAMETER_FUNCTION_DISPATCH_SPLIT_ARGS(x) \ + ) \ + , x \ + , 0 \ + , 0 \ + ) +/**/ + +#endif // include guard + |