(C++) unused parameter 'seq'
February 24, 2017 · View on GitHub
(C++) unused parameter 'seq'
Full warning message
/MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/container/vector/detail/vector_n_chooser.hpp:14: In file included from ../../../boost_1_42_0/boost/fusion/container/vector/detail/vector_n_chooser.hpp:14, /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/container/vector/vector.hpp:11: from ../../../boost_1_42_0/boost/fusion/container/vector/vector.hpp:11, /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/tuple/tuple.hpp:11: from ../../../boost_1_42_0/boost/fusion/tuple/tuple.hpp:11, /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/tuple.hpp:10: from ../../../boost_1_42_0/boost/fusion/tuple.hpp:10, /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/include/tuple.hpp:10: from ../../../boost_1_42_0/boost/fusion/include/tuple.hpp:10, /MyFolder/MyProject/../../../boost_1_42_0/boost/tr1/tuple.hpp:58: from ../../../boost_1_42_0/boost/tr1/tuple.hpp:58, /MyFolder/MyProject/../../../boost_1_42_0/boost/math/special_functions/detail/igamma_inverse.hpp:13: from ../../../boost_1_42_0/boost/math/special_functions/detail/igamma_inverse.hpp:13, /MyFolder/MyProject/../../../boost_1_42_0/boost/math/special_functions/gamma.hpp:1528: from ../../../boost_1_42_0/boost/math/special_functions/gamma.hpp:1528, /MyFolder/MyProject/../../../boost_1_42_0/boost/math/special_functions/beta.hpp:15: from ../../../boost_1_42_0/boost/math/special_functions/beta.hpp:15, /MyFolder/MyProject/../../../boost_1_42_0/boost/math/distributions/students_t.hpp:14: from ../../../boost_1_42_0/boost/math/distributions/students_t.hpp:14, /MyFolder/MyProject/main.cpp:1: from main.cpp:1: /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/container/vector/vector.hpp:62: instantiated from 'boost::fusion::vector<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::vector(const Sequence&) [with Sequence = boost::fusion::tuple<boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_>, T0 = boost::fusion::void_, T1 = boost::fusion::void_, T2 = boost::fusion::void_, T3 = boost::fusion::void_, T4 = boost::fusion::void_, T5 = boost::fusion::void_, T6 = boost::fusion::void_, T7 = boost::fusion::void_, T8 = boost::fusion::void_, T9 = boost::fusion::void_]' /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/tuple/make_tuple.hpp:22: instantiated from here /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/tuple/make_tuple.hpp:22: instantiated from here /MyFolder/MyProject/../../../boost_1_42_0/boost/fusion/container/vector/vector10.hpp:55: warning: unused parameter 'seq'
Cause
#include <boost/math/distributions/students_t.hpp>
Which takes you to the following line in 'boost/fusion/container/vector/vector10.hpp':
/*============================================================================= Copyright (c) 2001-2006 Joel de Guzman Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ==============================================================================*/ #if !defined(FUSION_VECTOR10_05042005_0257) #define FUSION_VECTOR10_05042005_0257 #include <boost/fusion/support/sequence_base.hpp> #include <boost/fusion/support/detail/access.hpp> #include <boost/fusion/iterator/next.hpp> #include <boost/fusion/iterator/deref.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/container/vector/detail/at_impl.hpp> #include <boost/fusion/container/vector/detail/value_at_impl.hpp> #include <boost/fusion/container/vector/detail/begin_impl.hpp> #include <boost/fusion/container/vector/detail/end_impl.hpp> #include <boost/mpl/void.hpp> #include <boost/mpl/int.hpp> #include <boost/mpl/bool.hpp> #include <boost/mpl/at.hpp> #include <boost/mpl/vector/vector10.hpp> #include <boost/type_traits/is_convertible.hpp> #include <boost/utility/enable_if.hpp> #include <boost/preprocessor/dec.hpp> #include <boost/preprocessor/iteration/iterate.hpp> #include <boost/preprocessor/repetition/enum.hpp> #include <boost/preprocessor/repetition/enum_shifted.hpp> #include <boost/preprocessor/repetition/enum_params.hpp> #include <boost/preprocessor/repetition/enum_binary_params.hpp> #include <boost/preprocessor/repetition/repeat_from_to.hpp> namespace boost { namespace fusion { struct vector_tag; struct fusion_sequence_tag; struct random_access_traversal_tag; template <typename Dummy = void> struct vector0 : sequence_base<vector0<Dummy> > { typedef mpl::vector0<> types; typedef vector_tag fusion_tag; typedef fusion_sequence_tag tag; // this gets picked up by MPL typedef mpl::false_ is_view; typedef random_access_traversal_tag category; typedef mpl::int_<0> size; vector0() {} template<typename Sequence> vector0(Sequence const& seq) //This line {} }; // expand vector1 to vector10 #define BOOST_PP_FILENAME_1 <boost/fusion/container/vector/detail/vector_n.hpp> #define BOOST_PP_ITERATION_LIMITS (1, 10) #include BOOST_PP_ITERATE() }} #endif
IDE: Qt Creator 1.3.1
Project type: Qt4 Console Application
Selected required modules: QtCore
Boost version: 1.42.0
Solution
The compiler is right: seq is an unused variable. I changed the code to
/*============================================================================= Copyright (c) 2001-2006 Joel de Guzman Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ==============================================================================*/ #if !defined(FUSION_VECTOR10_05042005_0257) #define FUSION_VECTOR10_05042005_0257 #include <boost/fusion/support/sequence_base.hpp> #include <boost/fusion/support/detail/access.hpp> #include <boost/fusion/iterator/next.hpp> #include <boost/fusion/iterator/deref.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/container/vector/detail/at_impl.hpp> #include <boost/fusion/container/vector/detail/value_at_impl.hpp> #include <boost/fusion/container/vector/detail/begin_impl.hpp> #include <boost/fusion/container/vector/detail/end_impl.hpp> #include <boost/mpl/void.hpp> #include <boost/mpl/int.hpp> #include <boost/mpl/bool.hpp> #include <boost/mpl/at.hpp> #include <boost/mpl/vector/vector10.hpp> #include <boost/type_traits/is_convertible.hpp> #include <boost/utility/enable_if.hpp> #include <boost/preprocessor/dec.hpp> #include <boost/preprocessor/iteration/iterate.hpp> #include <boost/preprocessor/repetition/enum.hpp> #include <boost/preprocessor/repetition/enum_shifted.hpp> #include <boost/preprocessor/repetition/enum_params.hpp> #include <boost/preprocessor/repetition/enum_binary_params.hpp> #include <boost/preprocessor/repetition/repeat_from_to.hpp> namespace boost { namespace fusion { struct vector_tag; struct fusion_sequence_tag; struct random_access_traversal_tag; template <typename Dummy = void> struct vector0 : sequence_base<vector0<Dummy> > { typedef mpl::vector0<> types; typedef vector_tag fusion_tag; typedef fusion_sequence_tag tag; // this gets picked up by MPL typedef mpl::false_ is_view; typedef random_access_traversal_tag category; typedef mpl::int_<0> size; vector0() {} template<typename Sequence> vector0(Sequence const&) //This line {} }; // expand vector1 to vector10 #define BOOST_PP_FILENAME_1 <boost/fusion/container/vector/detail/vector_n.hpp> #define BOOST_PP_ITERATION_LIMITS (1, 10) #include BOOST_PP_ITERATE() }} #endif