81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
// (C) Copyright John Maddock 2001.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/config for the most recent version.
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// MACRO: BOOST_NO_STD_ITERATOR_TRAITS
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// TITLE: std::iterator_traits
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// DESCRIPTION: The compiler does not provide a standard
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// compliant implementation of std::iterator_traits.
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// Note that the compiler may still have a non-standard
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// implementation.
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#include <iterator>
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#include <stddef.h>
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namespace boost_no_std_iterator_traits{
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struct UDT_iterator
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{
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typedef int value_type;
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typedef ptrdiff_t difference_type;
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typedef int* pointer;
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typedef int& reference;
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typedef std::input_iterator_tag iterator_category;
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};
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struct UDT{};
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int test()
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{
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std::iterator_traits<UDT_iterator>::value_type v = 0;
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std::iterator_traits<UDT_iterator>::difference_type d = 0;
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std::iterator_traits<UDT_iterator>::pointer p = &v;
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std::iterator_traits<UDT_iterator>::reference r = v;
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std::iterator_traits<UDT_iterator>::iterator_category cat;
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std::iterator_traits<UDT*>::value_type v2;
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std::iterator_traits<UDT*>::difference_type d2 = 0;
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std::iterator_traits<UDT*>::pointer p2 = &v2;
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std::iterator_traits<UDT*>::reference r2 = v2;
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std::iterator_traits<UDT*>::iterator_category cat2;
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std::iterator_traits<const UDT*>::value_type v3;
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std::iterator_traits<const UDT*>::difference_type d3 = 0;
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std::iterator_traits<const UDT*>::pointer p3 = &v3;
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std::iterator_traits<const UDT*>::reference r3 = v3;
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std::iterator_traits<const UDT*>::iterator_category cat3;
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//
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// suppress some warnings:
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//
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(void) &v;
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(void) &d;
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(void) &p;
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(void) &r;
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(void) &cat;
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(void) &v2;
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(void) &d2;
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(void) &p2;
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(void) &r2;
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(void) &cat2;
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(void) &v3;
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(void) &d3;
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(void) &p3;
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(void) &r3;
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(void) &cat3;
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return 0;
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}
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}
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