📄 boost_concept_check.h
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//=========================================================================== // Function Object Concepts template <class _Func, class _Return> struct _GeneratorConcept { void __constraints() { const _Return& __r _IsUnused = __f();// require operator() member function } _Func __f; }; template <class _Func> struct _GeneratorConcept<_Func,void> { void __constraints() { __f(); // require operator() member function } _Func __f; }; template <class _Func, class _Return, class _Arg> struct _UnaryFunctionConcept { void __constraints() { __r = __f(__arg); // require operator() } _Func __f; _Arg __arg; _Return __r; }; template <class _Func, class _Arg> struct _UnaryFunctionConcept<_Func, void, _Arg> { void __constraints() { __f(__arg); // require operator() } _Func __f; _Arg __arg; }; template <class _Func, class _Return, class _First, class _Second> struct _BinaryFunctionConcept { void __constraints() { __r = __f(__first, __second); // require operator() } _Func __f; _First __first; _Second __second; _Return __r; }; template <class _Func, class _First, class _Second> struct _BinaryFunctionConcept<_Func, void, _First, _Second> { void __constraints() { __f(__first, __second); // require operator() } _Func __f; _First __first; _Second __second; }; template <class _Func, class _Arg> struct _UnaryPredicateConcept { void __constraints() { __aux_require_boolean_expr(__f(__arg)); // require op() returning bool } _Func __f; _Arg __arg; }; template <class _Func, class _First, class _Second> struct _BinaryPredicateConcept { void __constraints() { __aux_require_boolean_expr(__f(__a, __b)); // require op() returning bool } _Func __f; _First __a; _Second __b; }; // use this when functor is used inside a container class like std::set template <class _Func, class _First, class _Second> struct _Const_BinaryPredicateConcept { void __constraints() { __const_constraints(__f); } void __const_constraints(const _Func& __fun) { __function_requires<_BinaryPredicateConcept<_Func, _First, _Second> >(); // operator() must be a const member function __aux_require_boolean_expr(__fun(__a, __b)); } _Func __f; _First __a; _Second __b; }; //=========================================================================== // Iterator Concepts template <class _Tp> struct _TrivialIteratorConcept { void __constraints() {// __function_requires< _DefaultConstructibleConcept<_Tp> >(); __function_requires< _AssignableConcept<_Tp> >(); __function_requires< _EqualityComparableConcept<_Tp> >();// typedef typename std::iterator_traits<_Tp>::value_type _V; (void)*__i; // require dereference operator } _Tp __i; }; template <class _Tp> struct _Mutable_TrivialIteratorConcept { void __constraints() { __function_requires< _TrivialIteratorConcept<_Tp> >(); *__i = *__j; // require dereference and assignment } _Tp __i, __j; }; template <class _Tp> struct _InputIteratorConcept { void __constraints() { __function_requires< _TrivialIteratorConcept<_Tp> >(); // require iterator_traits typedef's typedef typename std::iterator_traits<_Tp>::difference_type _Diff;// __function_requires< _SignedIntegerConcept<_Diff> >(); typedef typename std::iterator_traits<_Tp>::reference _Ref; typedef typename std::iterator_traits<_Tp>::pointer _Pt; typedef typename std::iterator_traits<_Tp>::iterator_category _Cat; __function_requires< _ConvertibleConcept< typename std::iterator_traits<_Tp>::iterator_category, std::input_iterator_tag> >(); ++__i; // require preincrement operator __i++; // require postincrement operator } _Tp __i; }; template <class _Tp, class _ValueT> struct _OutputIteratorConcept { void __constraints() { __function_requires< _AssignableConcept<_Tp> >(); ++__i; // require preincrement operator __i++; // require postincrement operator *__i++ = __t; // require postincrement and assignment } _Tp __i; _ValueT __t; }; template <class _Tp> struct _ForwardIteratorConcept { void __constraints() { __function_requires< _InputIteratorConcept<_Tp> >(); __function_requires< _DefaultConstructibleConcept<_Tp> >(); __function_requires< _ConvertibleConcept< typename std::iterator_traits<_Tp>::iterator_category, std::forward_iterator_tag> >(); typedef typename std::iterator_traits<_Tp>::reference _Ref; _Ref __r _IsUnused = *__i; } _Tp __i; }; template <class _Tp> struct _Mutable_ForwardIteratorConcept { void __constraints() { __function_requires< _ForwardIteratorConcept<_Tp> >(); *__i++ = *__i; // require postincrement and assignment } _Tp __i; }; template <class _Tp> struct _BidirectionalIteratorConcept { void __constraints() { __function_requires< _ForwardIteratorConcept<_Tp> >(); __function_requires< _ConvertibleConcept< typename std::iterator_traits<_Tp>::iterator_category, std::bidirectional_iterator_tag> >(); --__i; // require predecrement operator __i--; // require postdecrement operator } _Tp __i; }; template <class _Tp> struct _Mutable_BidirectionalIteratorConcept { void __constraints() { __function_requires< _BidirectionalIteratorConcept<_Tp> >(); __function_requires< _Mutable_ForwardIteratorConcept<_Tp> >(); *__i-- = *__i; // require postdecrement and assignment } _Tp __i; }; template <class _Tp> struct _RandomAccessIteratorConcept { void __constraints() { __function_requires< _BidirectionalIteratorConcept<_Tp> >(); __function_requires< _ComparableConcept<_Tp> >(); __function_requires< _ConvertibleConcept< typename std::iterator_traits<_Tp>::iterator_category, std::random_access_iterator_tag> >(); // ??? We don't use _Ref, are we just checking for "referenceability"? typedef typename std::iterator_traits<_Tp>::reference _Ref; __i += __n; // require assignment addition operator __i = __i + __n; __i = __n + __i; // require addition with difference type __i -= __n; // require assignment subtraction op __i = __i - __n; // require subtraction with // difference type __n = __i - __j; // require difference operator (void)__i[__n]; // require element access operator } _Tp __a, __b; _Tp __i, __j; typename std::iterator_traits<_Tp>::difference_type __n; }; template <class _Tp> struct _Mutable_RandomAccessIteratorConcept { void __constraints() { __function_requires< _RandomAccessIteratorConcept<_Tp> >(); __function_requires< _Mutable_BidirectionalIteratorConcept<_Tp> >(); __i[__n] = *__i; // require element access and assignment } _Tp __i; typename std::iterator_traits<_Tp>::difference_type __n; }; //=========================================================================== // Container Concepts template <class _Container> struct _ContainerConcept { typedef typename _Container::value_type _Value_type; typedef typename _Container::difference_type _Difference_type; typedef typename _Container::size_type _Size_type; typedef typename _Container::const_reference _Const_reference; typedef typename _Container::const_pointer _Const_pointer; typedef typename _Container::const_iterator _Const_iterator; void __constraints() { __function_requires< _InputIteratorConcept<_Const_iterator> >(); __function_requires< _AssignableConcept<_Container> >(); const _Container __c; __i = __c.begin(); __i = __c.end(); __n = __c.size(); __n = __c.max_size(); __b = __c.empty(); } bool __b; _Const_iterator __i; _Size_type __n; }; template <class _Container> struct _Mutable_ContainerConcept { typedef typename _Container::value_type _Value_type; typedef typename _Container::reference _Reference; typedef typename _Container::iterator _Iterator; typedef typename _Container::pointer _Pointer; void __constraints() { __function_requires< _ContainerConcept<_Container> >(); __function_requires< _AssignableConcept<_Value_type> >(); __function_requires< _InputIteratorConcept<_Iterator> >(); __i = __c.begin(); __i = __c.end(); __c.swap(__c2); } _Iterator __i; _Container __c, __c2; }; template <class _ForwardContainer> struct _ForwardContainerConcept { void __constraints() { __function_requires< _ContainerConcept<_ForwardContainer> >(); typedef typename _ForwardContainer::const_iterator _Const_iterator; __function_requires< _ForwardIteratorConcept<_Const_iterator> >(); } }; template <class _ForwardContainer> struct _Mutable_ForwardContainerConcept {
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