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// 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 CONST_BLOCK_HPP_
#define CONST_BLOCK_HPP_
#include <boost/local_function.hpp>
#include <boost/local_function/detail/preprocessor/void_list.hpp>
#include <boost/local_function/detail/preprocessor/line_counter.hpp>
#include <boost/preprocessor/list/for_each_i.hpp>
#include <boost/preprocessor/list/adt.hpp>
#include <boost/preprocessor/tuple/eat.hpp>
#include <boost/preprocessor/punctuation/comma_if.hpp>
#include <boost/preprocessor/control/iif.hpp>
#include <boost/preprocessor/cat.hpp>
// PRIVATE //
#define CONST_BLOCK_BIND_(r, unused, i, var) \
BOOST_PP_COMMA_IF(i) const bind& var
//[const_block_macro
#define CONST_BLOCK_(variables) \
void BOOST_LOCAL_FUNCTION( \
BOOST_PP_IIF(BOOST_PP_LIST_IS_NIL(variables), \
void BOOST_PP_TUPLE_EAT(3) \
, \
BOOST_PP_LIST_FOR_EACH_I \
)(CONST_BLOCK_BIND_, ~, variables) \
)
//]
//[const_block_end_macro
#define CONST_BLOCK_END_(id) \
BOOST_LOCAL_FUNCTION_NAME(BOOST_PP_CAT(const_block_, id)) \
BOOST_PP_CAT(const_block_, id)(); /* call local function immediately */
//]
// PUBLIC //
// Arguments `void | var1, var2, ... | (var1) (var2) ...`.
#ifdef BOOST_NO_CXX11_VARIADIC_MACROS
# define CONST_BLOCK(void_or_seq) \
CONST_BLOCK_(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(void_or_seq))
#else
# define CONST_BLOCK(...) \
CONST_BLOCK_(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(__VA_ARGS__))
#endif
#define CONST_BLOCK_END \
CONST_BLOCK_END_(BOOST_LOCAL_FUNCTION_DETAIL_PP_LINE_COUNTER)
#endif // #include guard
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