179 lines
4.6 KiB
C++
179 lines
4.6 KiB
C++
// 1999-08-23 bkoz
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// Copyright (C) 1999, 2001 Free Software Foundation
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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 2, 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 COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// 18.2.1.1 template class numeric_limits
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#include <limits>
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#include <limits.h>
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#include <float.h>
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#include <testsuite_hooks.h>
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template<typename T>
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struct extrema {
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static T min;
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static T max;
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};
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#define DEFINE_EXTREMA(T, m, M) \
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template<> T extrema<T>::min = m; \
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template<> T extrema<T>::max = M
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DEFINE_EXTREMA(char, CHAR_MIN, CHAR_MAX);
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DEFINE_EXTREMA(signed char, SCHAR_MIN, SCHAR_MAX);
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DEFINE_EXTREMA(unsigned char, 0, UCHAR_MAX);
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DEFINE_EXTREMA(short, SHRT_MIN, SHRT_MAX);
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DEFINE_EXTREMA(unsigned short, 0, USHRT_MAX);
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DEFINE_EXTREMA(int, INT_MIN, INT_MAX);
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DEFINE_EXTREMA(unsigned, 0U, UINT_MAX);
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DEFINE_EXTREMA(long, LONG_MIN, LONG_MAX);
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DEFINE_EXTREMA(unsigned long, 0UL, ULONG_MAX);
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DEFINE_EXTREMA(float, FLT_MIN, FLT_MAX);
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DEFINE_EXTREMA(double, DBL_MIN, DBL_MAX);
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DEFINE_EXTREMA(long double, LDBL_MIN, LDBL_MAX);
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#undef DEFINE_EXTREMA
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template<typename T>
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void test_extrema()
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{
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VERIFY( extrema<T>::min == std::numeric_limits<T>::min() );
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VERIFY( extrema<T>::max == std::numeric_limits<T>::max() );
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}
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#ifdef __CHAR_UNSIGNED__
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#define char_is_signed false
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#else
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#define char_is_signed true
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#endif
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void test_sign()
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{
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VERIFY( std::numeric_limits<char>::is_signed == char_is_signed );
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VERIFY( std::numeric_limits<signed char>::is_signed == true );
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VERIFY( std::numeric_limits<unsigned char>::is_signed == false );
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VERIFY( std::numeric_limits<short>::is_signed == true );
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VERIFY( std::numeric_limits<unsigned short>::is_signed == false );
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VERIFY( std::numeric_limits<int>::is_signed == true );
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VERIFY( std::numeric_limits<unsigned>::is_signed == false );
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VERIFY( std::numeric_limits<long>::is_signed == true );
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VERIFY( std::numeric_limits<unsigned long>::is_signed == false );
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VERIFY( std::numeric_limits<float>::is_signed == true );
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VERIFY( std::numeric_limits<double>::is_signed == true );
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VERIFY( std::numeric_limits<long double>::is_signed == true );
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}
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template<typename T>
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struct A
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{
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int key;
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public:
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A(int i = 0): key(i) { }
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bool
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operator==(int i) { return i == key; }
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};
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struct B { };
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bool test01()
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{
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bool test = true;
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std::numeric_limits< A<B> > obj;
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VERIFY( !obj.is_specialized );
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VERIFY( obj.min() == 0 );
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VERIFY( obj.max() == 0 );
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VERIFY( obj.digits == 0 );
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VERIFY( obj.digits10 == 0 );
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VERIFY( !obj.is_signed );
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VERIFY( !obj.is_integer );
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VERIFY( !obj.is_exact );
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VERIFY( obj.radix == 0 );
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VERIFY( obj.epsilon() == 0 );
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VERIFY( obj.round_error() == 0 );
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VERIFY( obj.min_exponent == 0 );
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VERIFY( obj.min_exponent10 == 0 );
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VERIFY( obj.max_exponent == 0 );
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VERIFY( obj.max_exponent10 == 0 );
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VERIFY( !obj.has_infinity );
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VERIFY( !obj.has_quiet_NaN );
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VERIFY( !obj.has_signaling_NaN );
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VERIFY( !obj.has_denorm );
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VERIFY( !obj.has_denorm_loss );
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VERIFY( obj.infinity() == 0 );
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VERIFY( obj.quiet_NaN() == 0 );
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VERIFY( obj.signaling_NaN() == 0 );
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VERIFY( obj.denorm_min() == 0 );
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VERIFY( !obj.is_iec559 );
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VERIFY( !obj.is_bounded );
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VERIFY( !obj.is_modulo );
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VERIFY( !obj.traps );
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VERIFY( !obj.tinyness_before );
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VERIFY( obj.round_style == std::round_toward_zero );
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#ifdef DEBUG_ASSERT
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assert(test);
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#endif
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return test;
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}
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// test linkage of the generic bits
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void test02()
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{
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typedef std::numeric_limits<B> b_nl_type;
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// Should probably do all of them...
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const int* pi1 = &b_nl_type::digits;
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const int* pi2 = &b_nl_type::digits10;
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const int* pi3 = &b_nl_type::max_exponent10;
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const bool* pb1 = &b_nl_type::traps;
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}
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int main()
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{
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test01();
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test02();
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test_extrema<char>();
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test_extrema<signed char>();
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test_extrema<unsigned char>();
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test_extrema<short>();
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test_extrema<unsigned short>();
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test_extrema<int>();
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test_extrema<unsigned>();
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test_extrema<long>();
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test_extrema<unsigned long>();
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test_extrema<float>();
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test_extrema<double>();
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test_extrema<long double>();
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test_sign();
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return 0;
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}
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