/*-----------------------------------------------------------------------------+ Copyright (c) 2010-2010: Joachim Faulhaber +------------------------------------------------------------------------------+ Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENCE.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +-----------------------------------------------------------------------------*/ #ifndef BOOST_ICL_CONCEPT_CONTAINER_HPP_JOFA_100923 #define BOOST_ICL_CONCEPT_CONTAINER_HPP_JOFA_100923 #include <boost/utility/enable_if.hpp> #include <boost/mpl/and.hpp> #include <boost/mpl/not.hpp> #include <boost/icl/type_traits/is_container.hpp> #include <boost/icl/type_traits/is_icl_container.hpp> namespace boost{ namespace icl { //============================================================================== //= Emptieness //============================================================================== /** Tests if the container is empty. Complexity: constant. */ template<class Type> typename enable_if<is_container<Type>, bool>::type is_empty(const Type& object) { return object.begin()==object.end(); } /** All content of the container is dropped. Complexity: linear. */ template<class Type> typename enable_if<is_container<Type>, void>::type clear(Type& object) { object.erase(object.begin(), object.end()); } //============================================================================== //= Size //============================================================================== template<class Type> typename enable_if<mpl::and_< is_container<Type> , mpl::not_<is_icl_container<Type> > > , std::size_t>::type iterative_size(const Type& object) { return object.size(); } //============================================================================== //= Swap //============================================================================== template<class Type> typename enable_if<is_container<Type>, void>::type swap(Type& left, Type& right) { left.swap(right); } //============================================================================== //= Iteration //============================================================================== template<class Type> typename enable_if<is_container<Type>, typename Type::iterator>::type cyclic_prior(Type& object, typename Type::iterator it_) { return it_ == object.begin() ? object.end() : --it_; } template<class Type> typename enable_if<is_container<Type>, typename Type::const_iterator>::type cyclic_prior(const Type& object, typename Type::const_iterator it_) { return it_ == object.begin() ? object.end() : --it_; } }} // namespace boost icl #endif