Any tips on finding the problematic line of code?

[Eric Lilja]

Hello, when I compile my project I get this (after doing a complete
clean first):
$ make
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c common_dialogs. cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c crc32.cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c globals.cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c main_window_pro cedure.cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c sfv_list_view.c pp
In file included from
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/sstream:640,
from sfv_list_view.c pp:8:
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc: In
member function `virtual typename std::basic_stri ngbuf<_CharT, _Traits,
_Alloc>::int_ty pe std::basic_stri ngbuf<_CharT, _Traits,
_Alloc>::overfl ow(typename _Traits::int_ty pe)':
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc:102 :
error: expected unqualified-id before '(' token
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc:104 :
error: expected unqualified-id before '(' token
sfv_list_view.c pp: At global scope:
sfv_list_view.c pp:184: warning: unused parameter 'arg'
make: *** [sfv_list_view.o] Error 1

It seems to be a problem involving how stringstreams are used in
sfv_list_view.c pp but all error messages point to the implementation
files of the standard library. Any tips on finding the offending line
of code that triggers all these obscure error messages deep inside
libstdc++ other than commenting things out (which may or may not be
easy to do)?

/ E

[Eric Lilja]

Eric Lilja wrote:

Hello, when I compile my project I get this (after doing a complete
clean first):
$ make
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c common_dialogs. cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c crc32.cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c globals.cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c main_window_pro cedure.cpp
g++ -Wall -W -ansi -pedantic -g3 -O0 -D_WIN32_WINNT=0 x501
-D_WIN32_IE=0x60 0 -c sfv_list_view.c pp
In file included from
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/sstream:640,
from sfv_list_view.c pp:8:
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc: In
member function `virtual typename std::basic_stri ngbuf<_CharT, _Traits,
_Alloc>::int_ty pe std::basic_stri ngbuf<_CharT, _Traits,
_Alloc>::overfl ow(typename _Traits::int_ty pe)':
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc:102 :
error: expected unqualified-id before '(' token
/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc:104 :
error: expected unqualified-id before '(' token
sfv_list_view.c pp: At global scope:
sfv_list_view.c pp:184: warning: unused parameter 'arg'
make: *** [sfv_list_view.o] Error 1

It seems to be a problem involving how stringstreams are used in
sfv_list_view.c pp but all error messages point to the implementation
files of the standard library. Any tips on finding the offending line
of code that triggers all these obscure error messages deep inside
libstdc++ other than commenting things out (which may or may not be
easy to do)?

/ E

Ok, this particular problem was caused by include order...

[Phlip]

Eric Lilja wrote:

/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc:102 :
error: expected unqualified-id before '(' token

Next time, look that line up and paste it into this post.

The line contains std::max(

Some systems also define max as a macro.

Go to sfv_list_view.c pp:7:, above the #include <sstream>, and add this:

#undef max

That's just a guess, so report back if it doesn't work.

--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!

[kwikius]

Phlip wrote:

Eric Lilja wrote:

/usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/sstream.tcc:102 :
error: expected unqualified-id before '(' token

Next time, look that line up and paste it into this post.

The line contains std::max(

Some systems also define max as a macro.

Go to sfv_list_view.c pp:7:, above the #include <sstream>, and add this:

#undef max

That's just a guess, so report back if it doesn't work.

FWIW the *acceptable* way to deal with this situation (courtesy of the
gurus at http://www.boost.org) is as follows:

// crappy hackers macro
#define min(a,b) (((a) < (b)) ? (a) : (b))

struct my{
typedef int min;
};

int main()
{
//############### ############### #####
// int n = my::min(); // Error
//############### ############### #####
#define PREVENT_MACRO_S UBSTITUTION
int n = my::min PREVENT_MACRO_S UBSTITUTION (); // OK
}

The boost version in <boost/config.hppis called
BOOST_PREVENT_M ACRO_SUBSTITUTI ON and is worth using so the gurus
understand what you mean when they read your code.

regards
Andy Little