forked from boostorg/iterator
129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
// (C) Copyright David Abrahams 2002.
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// (C) Copyright Jeremy Siek 2002.
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// (C) Copyright Thomas Witt 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// no include guard multiple inclusion intended
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//
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// This is a temporary workaround until the bulk of this is
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// available in boost config.
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// 23/02/03 thw
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//
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#include <boost/config.hpp> // for prior
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#include <boost/detail/workaround.hpp>
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#ifdef BOOST_ITERATOR_CONFIG_DEF
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# error you have nested config_def #inclusion.
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#else
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# define BOOST_ITERATOR_CONFIG_DEF
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#endif
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// We enable this always now. Otherwise, the simple case in
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// libs/iterator/test/constant_iterator_arrow.cpp fails to compile
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// because the operator-> return is improperly deduced as a non-const
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// pointer.
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#if 1 || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
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|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x531))
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// Recall that in general, compilers without partial specialization
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// can't strip constness. Consider counting_iterator, which normally
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// passes a const Value to iterator_facade. As a result, any code
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// which makes a std::vector of the iterator's value_type will fail
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// when its allocator declares functions overloaded on reference and
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// const_reference (the same type).
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//
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// Furthermore, Borland 5.5.1 drops constness in enough ways that we
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// end up using a proxy for operator[] when we otherwise shouldn't.
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// Using reference constness gives it an extra hint that it can
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// return the value_type from operator[] directly, but is not
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// strictly necessary. Not sure how best to resolve this one.
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# define BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY 1
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#endif
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x5A0)) \
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|| (BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 700) && defined(_MSC_VER)) \
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|| BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042)) \
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|| BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x590))
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# define BOOST_NO_LVALUE_RETURN_DETECTION
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# if 0 // test code
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struct v {};
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typedef char (&no)[3];
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template <class T>
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no foo(T const&, ...);
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template <class T>
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char foo(T&, int);
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struct value_iterator
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{
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v operator*() const;
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};
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template <class T>
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struct lvalue_deref_helper
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{
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static T& x;
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enum { value = (sizeof(foo(*x,0)) == 1) };
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};
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int z2[(lvalue_deref_helper<v*>::value == 1) ? 1 : -1];
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int z[(lvalue_deref_helper<value_iterator>::value) == 1 ? -1 : 1 ];
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# endif
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#endif
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#if BOOST_WORKAROUND(__MWERKS__, <=0x2407)
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# define BOOST_NO_IS_CONVERTIBLE // "is_convertible doesn't work for simple types"
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#endif
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#if BOOST_WORKAROUND(__GNUC__, == 3) && BOOST_WORKAROUND(__GNUC_MINOR__, < 4) && !defined(__EDG_VERSION__) \
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|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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# define BOOST_NO_IS_CONVERTIBLE_TEMPLATE // The following program fails to compile:
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# if 0 // test code
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#include <boost/type_traits/is_convertible.hpp>
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template <class T>
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struct foo
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{
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foo(T);
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template <class U>
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foo(foo<U> const& other) : p(other.p) { }
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T p;
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};
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bool x = boost::is_convertible<foo<int const*>, foo<int*> >::value;
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# endif
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#endif
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#if !defined(BOOST_MSVC) && (defined(BOOST_NO_SFINAE) || defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_IS_CONVERTIBLE_TEMPLATE))
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# define BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
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#endif
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# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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// GCC-2.95 (obsolete) eagerly instantiates templated constructors and conversion
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// operators in convertibility checks, causing premature errors.
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//
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// Borland's problems are harder to diagnose due to lack of an
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// instantiation stack backtrace. They may be due in part to the fact
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// that it drops cv-qualification willy-nilly in templates.
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# define BOOST_NO_ONE_WAY_ITERATOR_INTEROP
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# endif
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// no include guard; multiple inclusion intended
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