#include <boost/preprocessor/punctuation/paren.hpp>
#include <boost/preprocessor/tuple/eat.hpp>
#define _MAX_ARGS 64
/* Python code for generating The TF_ARG_N() macros:
for i in range(1, 32+1):
line = '#define TF_ARG_%d(' % i
for j in range(1, i):
line += '_%d,' % j
line += '_%d,...) _%d' % (i, i)
print(line)
*/
// Make sure TF_ARG_N() supports at least BOOST_PP_LIMIT_TUPLE arguments.
#define _TF_ARG_ERROR(a, b, c)
#define _TF_ARG_TUPLE_OVERFLOW(a, b, c)
BOOST_PP_IIF(BOOST_PP_EQUAL(1, \
BOOST_PP_EXPAND(BOOST_PP_CAT(TF_ARG_, _MAX_ARGS) BOOST_PP_LPAREN() \
_TF \
BOOST_PP_REPEAT(BOOST_PP_SUB(_MAX_ARGS, 2), _TF_NUM_ARGS_REP, _TF) \
BOOST_PP_COMMA() 1 BOOST_PP_RPAREN())), \
BOOST_PP_TUPLE_EAT(1), _TF_ARG_ERROR)(...)
BOOST_PP_IIF(BOOST_PP_GREATER_EQUAL(_MAX_ARGS, BOOST_PP_LIMIT_TUPLE), \
BOOST_PP_TUPLE_EAT(1), _TF_ARG_TUPLE_OVERFLOW)(...)
#endif
// Copyright (c) 2016
// Author: Chrono Law
#include <boost/preprocessor.hpp>
// gcc -std=c++11 -P -E -o a.out functions.cpp;cat a.out;rm a.out
/////////////////
#if __cplusplus < 201103L
BOOST_PP_ASSERT(0)
#endif
#define x BOOST_PP_MUL(6, 6)
BOOST_PP_ASSERT(BOOST_PP_EQUAL(x, 36))
#undef x
/////////////////
#define helper(z, n, d) BOOST_PP_CAT(d,n)
#define DECL_VARS(n, var) BOOST_PP_ENUM(n, helper, var)
int DECL_VARS(10, x);
#undef helper
#undef DECL_VARS
#define NGX_NULL_HELPER(z, n, d) d
#define NGX_MODULE_NULL(n) \
BOOST_PP_ENUM(n, NGX_NULL_HELPER, nullptr)