id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11640	scope_exit: -Wshadow warning issued	lukasz.czajczyk@…	Lorenzo Caminiti	"Hi,
BOOST_SCOPE_EXIT emits warning: declaration shadows a local variable [-Wshadow] in CLANG compiler.
Tested with boost 1.54-1.58 and CLANG 3.5-3.7. The issue does not occur on GCC when boost is included using -isystem.

Sample program:
{{{
#!div style=""font-size: 80%""
Code highlighting:
  {{{#!c++
#include <boost/scope_exit.hpp>

int main()
{
   int i, j = 0;
   BOOST_SCOPE_EXIT(i, j)
   {} BOOST_SCOPE_EXIT_END
   return 0;
}
  }}}
}}}




Compiled with clang++ -isystem /tmp/boost/boost_1_58_0 -Wshadow

 warning: declaration shadows a local variable [-Wshadow]
   BOOST_SCOPE_EXIT(i, j)
                    ^
/tmp/boost/boost_1_58_0/boost/scope_exit.hpp:900:17: note: expanded from macro 'BOOST_SCOPE_EXIT'
                __VA_ARGS__)
                ^
/tmp/boost/boost_1_58_0/boost/scope_exit.hpp:893:59: note: expanded from macro 'BOOST_SCOPE_EXIT_ID'
                        BOOST_SCOPE_EXIT_AUX_PP_VOID_LIST(__VA_ARGS__)))
                                                          ^
/tmp/boost/boost_1_58_0/boost/scope_exit.hpp:178:59: note: expanded from macro 'BOOST_SCOPE_EXIT_AUX_PP_VOID_LIST'
            BOOST_SCOPE_EXIT_AUX_PP_KEYWORD_IS_VOID_BACK, __VA_ARGS__)
                                                          ^
note: (skipping 66 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
/tmp/boost/boost_1_58_0/boost/preprocessor/list/adt.hpp:35:63: note: expanded from macro 'BOOST_PP_LIST_FIRST_D'
#    define BOOST_PP_LIST_FIRST_D(list) BOOST_PP_LIST_FIRST_I list
                                                              ^
/tmp/boost/boost_1_58_0/boost/preprocessor/list/adt.hpp:40:44: note: expanded from macro 'BOOST_PP_LIST_FIRST_I'
# define BOOST_PP_LIST_FIRST_I(head, tail) head
                                           ^
/tmp/boost/boost_1_58_0/boost/scope_exit.hpp:316:5: note: expanded from macro 'BOOST_SCOPE_EXIT_AUX_ARG_DECL'
    var
    ^
p.cxx:5:8: note: previous declaration is here
   int i, j = 0;
       ^

"	Bugs	new	To Be Determined	scope_exit	Boost 1.58.0	Problem