1. are you using the g++ or gcc ?

2. which version are you using ? I got the code from another group which is on older version of g++ (perhaps 4.3.x) and they don't get warning too.

we tried 4.4.5 and 4.6 of g++ with same results.

my cmd line is below again - not sure what else could be different.

g++ -ftemplate-depth-128 -O0 -fno-inline -Wall -g -Wconversion -Wno-strict-aliasing -Wextra -Wnon-virtual-dtor -Wno-missing-field-initializers -Wno-array-bounds -Wno-ignored-qualifiers -Wno-parentheses -Wno-strict-aliasing -fPIC -DBOOST_ALL_NO_LIB -I<path to boost_1_44_0>/include -Iinclude -c -o boost_regex_test.o boost_regex_test.cpp

Vicente, sorry for misspelling your name in the last email.

thanks

On Dec 8, 2011, at 3:38 PM, Rai, Neeraj wrote:

Hi Vincent,

You are right - the -Wconversion causes it to warn on that line. Is there any way to fix it ?

2 reasons : a) we are not allowed to have warnings in our code

b) I am going to miss the real warnings about conversion if I let this pass.

I just tried 1.48.0 with g++ 4.4.5 and 4.6 and same results. Without -Wconversion it is clean, but that is not an option for me.

I just tried again with -Wconversion (and boost 1.48). No warnings.

Not sure what is PO ?

I think he meant "OP" - original poster.

From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Vicente J. Botet Escriba
Sent: Thursday, December 08, 2011 6:24 PM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] [boost] compilation warnings questions by a newbee

Le 09/12/11 00:11, Marshall Clow a écrit :

On Dec 8, 2011, at 2:58 PM, Rai, Neeraj wrote:

Hi,

I am writing my first boost program and having trouble with the compiler warning against boost 1.44.0.

Is there any way to get rid of those warnings so I can focus on real warnings in my code ?

The gist of warning is :

boost_1_44_0/include/boost/mpl/aux_/integral_wrapper.hpp:73:96: warning: the result of the conversion is unspecified because '-0x00000000000000001' is outside the range of type 'boost::numeric::udt_builtin_mixture_enum' [-Wconversion]

Any help or pointers are appreciated.

Neeraj

====== The following program is a cut down version of my code, just declares sregex

#include <iostream>

#include <boost/xpressive/xpressive.hpp>

int main (int _argc, const char** _argv)

{

std::cout << "argc=" << _argc << " argv=" << _argv << std::endl;

using namespace boost::xpressive;

std::string keyword("");

sregex const re(sregex::compile(keyword, sregex::icase));

}

Just tried this with both gcc 4.2.1 and clang 3.0 using the current Boost (1.48), and it worked fine.
No warnings, even with -Wall

The PO is using -Wconversion

Best,
Vicente

-- Marshall

Marshall Clow Idio Software <mailto:mclow.lists@gmail.com>

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