Hi, since Boost.Chrono was accepted I have moved to the trunk and the release branch. There are a lot of file in the sandbox that have been changed since. In particular the error comes from some compilers don't supporting nested value arithmetic in templates. To workaround this the trunk contain instead template<> struct abs_impl { #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC_2) template< typename N > struct apply : aux::abs_wknd< typename N::value_type, N::value > #else template< typename N > struct apply : integral_c< typename N::value_type, ((N::value < 0) ? (-N::value) : N::value ) > #endif { }; }; For this reason a suggest you to move to the trunk or the release branch. I will remove the Chrono sandbox as soon as the release 1.47 is out. Best, Vicente Message du 15/04/11 00:29

De : "lcaminiti" A : boost@lists.boost.org Copie à : Objet : [boost]  [chrono] Compiler errors for mpl/abs.hpp

Hello all,

I am trying to compile the example below on MSVC using Boost.Chrono (headers-only) from the sandbox but I am getting some compiler errors.

What am I doing wrong?

Thank you very much. --Lorenzo

#define BOOST_CHRONO_INLINED #include #include #include #include #include #include #include

int main(int argc, char* argv[]) { assert(argc == 2); unsigned long n = sqrt(double(atol(argv[1])));

using boost::phoenix::ref; using boost::phoenix::arg_names::_1;

double sum = 0.0; int factor = 1;

std::vector v(n); std::fill(v.begin(), v.end(), 1.0);

boost::chrono::duration sec; for (unsigned long i = 0; i < n; ++i) { boost::chrono::system_clock::time_point start = boost::chrono::system_clock::now(); std::for_each(v.begin(), v.end(), ( ref(sum) += factor * _1 )); sec += boost::chrono::system_clock::now() - start; } std::cout << sec.count() << std::endl;

assert(sum == n * n); return 0; }

E:\sandbox\boost-sandbox-local\libs\local\example>cl /EHs /Ox /I..\..\.. /I"c:\P rogram Files\boost\boost_1_46_1" /I..\..\..\..\boost-sandbox-chrono.x benchmark_ boost_phoenix.cpp Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.42 for 80x86 Copyright (C) Microsoft Corporation. All rights reserved.

benchmark_boost_phoenix.cpp ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(72) : error C2143: syntax e rror : missing ',' before ')' ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(75) : see reference to class template instantiation 'boost::mpl::abs_impl::apply' being compiled ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(72) : error C2059: syntax e rror : ')' ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(74) : error C2143: syntax e rror : missing ';' before '{' ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(75) : error C2143: syntax e rror : missing ';' before '}' ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(72) : error C2143: syntax e rror : missing ';' before '}' ..\..\..\..\boost-sandbox-chrono.x\boost/mpl/abs.hpp(72) : fatal error C1004: un expected end-of-file found

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