52 lines
2 KiB
C++
52 lines
2 KiB
C++
// 2004-03-02 Petur Runolfsson <peturr02@ru.is>
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// Copyright (C) 2004-2024 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// 27.4.3 fpos
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// { dg-do compile }
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// { dg-require-effective-target hosted }
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#include <limits>
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#include <iterator>
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// libstdc++/14320
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typedef std::istreambuf_iterator<char>::difference_type Distance;
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#if __cplusplus >= 201103L
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static_assert( std::is_integral<Distance>::value, "integral type" );
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static_assert( std::is_signed<Distance>::value, "signed integral type" );
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#else
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template<typename> struct SignedInteger { enum { value = 0 }; };
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// The C++ standard didn't originally have "long long", however that
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// type is in the C++11 standard and testing for it allows
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// ilp32 targets to pass this test when `Distance' is 64 bits.
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template<> struct SignedInteger<long long int> { enum { value = 1 }; };
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template<> struct SignedInteger<long int> { enum { value = 1 }; };
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template<> struct SignedInteger<int> { enum { value = 1 }; };
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template<> struct SignedInteger<short int> { enum { value = 1 }; };
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template<> struct SignedInteger<char> {
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enum { value = std::numeric_limits<char>::is_signed };
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};
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template<> struct SignedInteger<wchar_t> {
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enum { value = std::numeric_limits<wchar_t>::is_signed };
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};
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char assertion[SignedInteger<Distance>::value ? 1 : -1];
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#endif
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