ceph/src/boost/libs/local_function/test/same_line_seq.cpp

   1
   2 // Copyright (C) 2009-2012 Lorenzo Caminiti
   3 // Distributed under the Boost Software License, Version 1.0
   4 // (see accompanying file LICENSE_1_0.txt or a copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6 // Home at http://www.boost.org/libs/local_function
   7
   8 #include <boost/local_function.hpp>
   9 #include <boost/preprocessor/cat.hpp>
  10 #include <boost/detail/lightweight_test.hpp>
  11 #include <iostream>
  12
  13 #define LOCAL_INC_DEC(offset) \
  14     int BOOST_LOCAL_FUNCTION_ID(BOOST_PP_CAT(inc, __LINE__), /* unique ID */ \
  15             (const bind offset) (const int x) ) { \
  16         return x + offset; \
  17     } BOOST_LOCAL_FUNCTION_NAME(inc) \
  18     \
  19     int BOOST_LOCAL_FUNCTION_ID(BOOST_PP_CAT(dec, __LINE__), \
  20             (const bind offset) (const int x) ) { \
  21         return x - offset; \
  22     } BOOST_LOCAL_FUNCTION_NAME(dec)
  23
  24 #define LOCAL_INC_DEC_TPL(offset) \
  25     T BOOST_LOCAL_FUNCTION_ID_TPL(BOOST_PP_CAT(inc, __LINE__), \
  26             (const bind offset) (const T x) ) { \
  27         return x + offset; \
  28     } BOOST_LOCAL_FUNCTION_NAME_TPL(inc) \
  29     \
  30     T BOOST_LOCAL_FUNCTION_ID_TPL(BOOST_PP_CAT(dec, __LINE__), \
  31             (const bind offset) (const T x) ) { \
  32         return x - offset; \
  33     } BOOST_LOCAL_FUNCTION_NAME_TPL(dec)
  34
  35 template<typename T>
  36 void f(T& delta) {
  37     LOCAL_INC_DEC_TPL(delta) // Multiple local functions on same line.
  38     BOOST_TEST(dec(inc(123)) == 123);
  39 }
  40
  41 int main(void) {
  42     int delta = 10;
  43     LOCAL_INC_DEC(delta) // Declare local functions on same line using `_ID`.
  44     BOOST_TEST(dec(inc(123)) == 123);
  45     f(delta);
  46     return boost::report_errors();
  47 }
  48