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- // (C) Copyright John Maddock 2001.
- // Use, modification and distribution are subject to 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)
- // See http://www.boost.org/libs/config for the most recent version.
- // MACRO: BOOST_NO_STD_ITERATOR_TRAITS
- // TITLE: std::iterator_traits
- // DESCRIPTION: The compiler does not provide a standard
- // compliant implementation of std::iterator_traits.
- // Note that the compiler may still have a non-standard
- // implementation.
- #include <iterator>
- #include <stddef.h>
- namespace boost_no_std_iterator_traits{
- struct UDT_iterator
- {
- typedef int value_type;
- typedef ptrdiff_t difference_type;
- typedef int* pointer;
- typedef int& reference;
- typedef std::input_iterator_tag iterator_category;
- };
- struct UDT{};
- int test()
- {
- std::iterator_traits<UDT_iterator>::value_type v = 0;
- std::iterator_traits<UDT_iterator>::difference_type d = 0;
- std::iterator_traits<UDT_iterator>::pointer p = &v;
- std::iterator_traits<UDT_iterator>::reference r = v;
- std::iterator_traits<UDT_iterator>::iterator_category cat;
- std::iterator_traits<UDT*>::value_type v2;
- std::iterator_traits<UDT*>::difference_type d2 = 0;
- std::iterator_traits<UDT*>::pointer p2 = &v2;
- std::iterator_traits<UDT*>::reference r2 = v2;
- std::iterator_traits<UDT*>::iterator_category cat2;
- std::iterator_traits<const UDT*>::value_type v3;
- std::iterator_traits<const UDT*>::difference_type d3 = 0;
- std::iterator_traits<const UDT*>::pointer p3 = &v3;
- std::iterator_traits<const UDT*>::reference r3 = v3;
- std::iterator_traits<const UDT*>::iterator_category cat3;
- //
- // suppress some warnings:
- //
- (void) &v;
- (void) &d;
- (void) &p;
- (void) &r;
- (void) &cat;
- (void) &v2;
- (void) &d2;
- (void) &p2;
- (void) &r2;
- (void) &cat2;
- (void) &v3;
- (void) &d3;
- (void) &p3;
- (void) &r3;
- (void) &cat3;
- return 0;
- }
- }
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