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Diffstat (limited to 'boost/local_function/aux_/macro/code_/bind.hpp')
| -rw-r--r-- | boost/local_function/aux_/macro/code_/bind.hpp | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/boost/local_function/aux_/macro/code_/bind.hpp b/boost/local_function/aux_/macro/code_/bind.hpp new file mode 100644 index 0000000000..b235e7384b --- /dev/null +++ b/boost/local_function/aux_/macro/code_/bind.hpp @@ -0,0 +1,252 @@ + +// Copyright (C) 2009-2012 Lorenzo Caminiti +// Distributed under the Boost Software License, Version 1.0 +// (see accompanying file LICENSE_1_0.txt or a copy at +// http://www.boost.org/LICENSE_1_0.txt) +// Home at http://www.boost.org/libs/local_function + +#ifndef BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_HPP_ +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_HPP_ + +#include <boost/local_function/aux_/symbol.hpp> +#include <boost/local_function/aux_/macro/decl.hpp> +#include <boost/local_function/aux_/preprocessor/traits/bind.hpp> +#include <boost/local_function/aux_/preprocessor/traits/decl_binds.hpp> +#include <boost/local_function/aux_/preprocessor/traits/decl_const_binds.hpp> +#include <boost/utility/identity_type.hpp> +#include <boost/scope_exit.hpp> +#include <boost/type_traits/remove_reference.hpp> +#include <boost/type_traits/function_traits.hpp> +#include <boost/preprocessor/control/expr_iif.hpp> +#include <boost/preprocessor/control/iif.hpp> +#include <boost/preprocessor/facilities/empty.hpp> +#include <boost/preprocessor/facilities/is_empty.hpp> +#include <boost/preprocessor/facilities/identity.hpp> +#include <boost/preprocessor/logical/bitand.hpp> +#include <boost/preprocessor/punctuation/comma_if.hpp> +#include <boost/preprocessor/tuple/elem.hpp> +#include <boost/preprocessor/tuple/eat.hpp> +#include <boost/preprocessor/list/adt.hpp> +#include <boost/preprocessor/list/for_each_i.hpp> +#include <boost/preprocessor/list/append.hpp> + +// PRIVATE // + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAMS_VAR_(id) \ + BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (params)(id) ) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_TAG_DECL_(r, id, i, bind_traits) \ + BOOST_SCOPE_EXIT_DETAIL_TAG_DECL(r, id, i, \ + BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITHOUT_TYPE( \ + bind_traits)) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_CAPTURE_DECL_TYPED_( \ + r, id, typename01, i, bind_traits) \ + typedef BOOST_PP_EXPR_IIF(typename01, typename) \ + /* remove ref because typed var can have & prefix */ \ + ::boost::remove_reference< BOOST_PP_EXPR_IIF(typename01, typename) \ + ::boost::function_traits< \ + /* instead of using Boost.Typeof, get bind type as 1st */ \ + /* argument type of func type `void (type_ [&] var_)` */ \ + void ( BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITH_TYPE( \ + bind_traits) ) \ + >::arg1_type \ + >::type \ + BOOST_SCOPE_EXIT_DETAIL_CAPTURE_T(id, i, \ + BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITHOUT_TYPE( \ + bind_traits)) \ + ; /* close typedef */ + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_CAPTURE_DECL_DEDUCED_( \ + r, id, typename01, i, bind_traits) \ + BOOST_SCOPE_EXIT_DETAIL_CAPTURE_DECL(r, \ + ( \ + id \ + , \ + /* ScopeExit expects typename or EMPTY() here */ \ + BOOST_PP_EXPR_IIF(typename01, typename) \ + ), \ + i, BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITHOUT_TYPE( \ + bind_traits)) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_CAPTURE_DECL_( \ + r, id_typename, i, bind_traits) \ + BOOST_PP_IIF(BOOST_PP_IS_EMPTY( \ + BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITH_TYPE(bind_traits)), \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_CAPTURE_DECL_DEDUCED_ \ + , \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_CAPTURE_DECL_TYPED_ \ + )(r, BOOST_PP_TUPLE_ELEM(2, 0, id_typename), \ + BOOST_PP_TUPLE_ELEM(2, 1, id_typename), i, bind_traits) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAM_DECL_( \ + r, id_typename, i, bind_traits) \ + BOOST_SCOPE_EXIT_DETAIL_PARAM_DECL(r, \ + ( \ + BOOST_PP_TUPLE_ELEM(2, 0, id_typename) \ + , \ + /* ScopeExit expects typename or EMPTY() here */ \ + BOOST_PP_EXPR_IIF(BOOST_PP_TUPLE_ELEM(2, 1, id_typename), \ + typename \ + ) \ + ), \ + i, BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITHOUT_TYPE( \ + bind_traits)) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_MEMBER_DECL_VAR_( \ + r, id, typename01, i, var) \ + BOOST_PP_EXPR_IIF(typename01, typename) \ + BOOST_IDENTITY_TYPE(( /* must use IDENTITY because of tparam comma */ \ + ::boost::scope_exit::detail::member< \ + BOOST_SCOPE_EXIT_DETAIL_PARAM_T(id, i, var) \ + , BOOST_SCOPE_EXIT_DETAIL_TAG(id, i) \ + > \ + )) \ + BOOST_SCOPE_EXIT_DETAIL_PARAM(id, i, var); + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_MEMBER_DECL_( \ + r, id_typename, i, bind_traits) \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_MEMBER_DECL_VAR_(r, \ + BOOST_PP_TUPLE_ELEM(2, 0, id_typename), \ + BOOST_PP_TUPLE_ELEM(2, 1, id_typename), \ + i, BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITHOUT_TYPE( \ + bind_traits)) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAM_INIT_(r, id, i, bind_traits) \ + BOOST_SCOPE_EXIT_DETAIL_PARAM_INIT(r, id, i, \ + BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_VAR_WITHOUT_TYPE( \ + bind_traits)) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_CAPTURE_TYPE_(id) \ + BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (this_capture_type)(id) ) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPE_(id) \ + BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (this_type)(id) ) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPEDEF_DEDUCED_( \ + id, typename01, all_bind_this_types) \ + BOOST_SCOPE_EXIT_DETAIL_TYPEDEF_TYPEOF_THIS(id, \ + BOOST_PP_EXPR_IIF(typename01, typename), /* otherwise EMPTY() */ \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_CAPTURE_TYPE_(id)) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPEDEF_TYPED_( \ + id, typename01, all_bind_this_types) \ + typedef \ + BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_THIS_TYPE(BOOST_PP_LIST_FIRST( \ + all_bind_this_types)) \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_CAPTURE_TYPE_(id) \ + ; + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPEDEF_( \ + id, typename01, all_bind_this_types) \ + /* typedef type_ */ \ + BOOST_PP_IIF(BOOST_PP_IS_EMPTY( \ + /* all_bind_this_type is list with 1 elem (possibly PP_EMPTY), */ \ + /* otherwise got a pp-parsing error before getting here */ \ + BOOST_LOCAL_FUNCTION_AUX_PP_BIND_TRAITS_THIS_TYPE( \ + BOOST_PP_LIST_FIRST(all_bind_this_types))), \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPEDEF_DEDUCED_ \ + , \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPEDEF_TYPED_ \ + )(id, typename01, all_bind_this_types) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_ALL_( \ + all_binds, all_bind_this_types, id, typename01) \ + /* binding tags */ \ + BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS(all_bind_this_types), \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPEDEF_ \ + , \ + BOOST_PP_TUPLE_EAT(3) \ + )(id, typename01, all_bind_this_types) \ + BOOST_PP_LIST_FOR_EACH_I(BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_TAG_DECL_, id, \ + all_binds) \ + BOOST_PP_LIST_FOR_EACH_I(BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_CAPTURE_DECL_, \ + (id, typename01), all_binds) \ + /* binding class */ \ + struct BOOST_SCOPE_EXIT_DETAIL_PARAMS_T(id) { \ + /* interim capture types to workaround internal error on old GCC */ \ + BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(all_bind_this_types), \ + typedef BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_CAPTURE_TYPE_(id) \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPE_(id) ; \ + ) \ + BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(all_bind_this_types), \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPE_(id) \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_VAR; \ + ) \ + BOOST_PP_LIST_FOR_EACH_I( \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAM_DECL_, \ + (id, typename01), all_binds) \ + BOOST_PP_LIST_FOR_EACH_I( \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_MEMBER_DECL_, \ + (id, typename01), all_binds) \ + } BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAMS_VAR_(id) = \ + /* NOTE: there is no way to wrap member initializer commas within */ \ + /* parenthesis so you must handle these commas manually if expanding */ \ + /* this macro within another macro */ \ + { \ + /* initialize the struct with param values to bind */ \ + BOOST_PP_EXPR_IIF(BOOST_PP_LIST_IS_CONS(all_bind_this_types), \ + this) /* here name `this` access object at enclosing scope */ \ + BOOST_PP_COMMA_IF(BOOST_PP_BITAND( \ + BOOST_PP_LIST_IS_CONS(all_bind_this_types) \ + , BOOST_PP_LIST_IS_CONS(all_binds) \ + )) \ + BOOST_PP_LIST_FOR_EACH_I( \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAM_INIT_, id, all_binds) \ + }; + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_(id, typename01, decl_traits) \ + /* IMPORTANT: the order of these appends is important, it must follow */ \ + /* the indexing order used by the functor code which starts */ \ + /* enumerating const binds and then non-const binds */ \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_ALL_( \ + BOOST_PP_LIST_APPEND( \ + BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_CONST_BINDS( \ + decl_traits),\ + BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_BINDS( \ + decl_traits)), \ + BOOST_PP_LIST_APPEND( \ + BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_CONST_BIND_THIS_TYPES(decl_traits), \ + BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_BIND_THIS_TYPES( \ + decl_traits)), \ + id, typename01) + +// PUBLIC // + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPE(id, typename01) \ + BOOST_PP_EXPR_IIF(typename01, typename) \ + BOOST_SCOPE_EXIT_DETAIL_PARAMS_T(id):: \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_TYPE_(id) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_THIS_VAR \ + BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (this_var) ) + +#define BOOST_LOCAL_FUNCTION_AUX_CODE_BIND(id, typename01, decl_traits) \ + /* the binding data structures must be declared and initialized (to */ \ + /* empty structs, so hopefully the compiler will optimize away the */ \ + /* no-op code) even when there is no bound param because these structs */ \ + /* are used to init `...args.value` which is always used by the `END` */ \ + /* macro later because this macro does not know if there are bound */ \ + /* params or not */ \ + BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_(id, typename01, decl_traits) \ + /* this code takes advantage of the template argument list/comparison */ \ + /* operator ambiguity to declare a variable iff it hasn't already been */ \ + /* declared in that scope; the second occurrence is parsed as: */ \ + /* (declared<(resolve<sizeof(boost_local_auxXargs)>::cmp1<0)>::cmp2> */ \ + /* ...Xargs); */ \ + /* which is a no-op */ \ + ::boost::scope_exit::detail::declared< boost::scope_exit::detail::resolve< \ + /* cannot prefix with `::` as in `sizeof(:: ...` because the name */ \ + /* must refer to the local variable name to allow multiple local */ \ + /* functions (and exits) within the same scope (however this */ \ + /* does not allow for nesting because local variables cannot be */ \ + /* used in nested code blocks) */ \ + sizeof(BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR) \ + >::cmp1<0>::cmp2 > BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR; \ + /* stores bound types/values into `...args` variable (args variable */ \ + /* can be accessed by `NAME` macro because doesn't use __LINE__ id) */ \ + BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR.value = \ + &BOOST_LOCAL_FUNCTION_AUX_CODE_BIND_PARAMS_VAR_(id); + +#endif // #include guard + |