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81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
// boost utility cast test program -----------------------------------------//
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// (C) Copyright Beman Dawes, Dave Abrahams 1999. Distributed under the Boost
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// 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 for most recent version including documentation.
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// Revision History
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// 28 Set 04 taken from the old cast library (Fernando Cacciola)
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#include <iostream>
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#include <climits>
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#include <cfloat> // for DBL_MAX (Peter Schmid)
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#include <boost/numeric/conversion/cast.hpp>
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#include <boost/core/lightweight_test.hpp>
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# if SCHAR_MAX == LONG_MAX
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# error "This test program doesn't work if SCHAR_MAX == LONG_MAX"
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# endif
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using namespace boost;
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using std::cout;
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int main()
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{
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# ifdef NDEBUG
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cout << "NDEBUG is defined\n";
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# else
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cout << "NDEBUG is not defined\n";
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# endif
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cout << "\nBeginning tests...\n";
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// test implicit_cast and numeric_cast -------------------------------------//
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// tests which should succeed
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long small_value = 1;
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long small_negative_value = -1;
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long large_value = LONG_MAX;
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long large_negative_value = LONG_MIN;
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signed char c = 0;
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c = large_value; // see if compiler generates warning
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c = numeric_cast<signed char>( small_value );
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BOOST_TEST( c == 1 );
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c = 0;
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c = numeric_cast<signed char>( small_value );
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BOOST_TEST( c == 1 );
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c = 0;
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c = numeric_cast<signed char>( small_negative_value );
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BOOST_TEST( c == -1 );
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// These tests courtesy of Joe R NWP Swatosh<joe.r.swatosh@usace.army.mil>
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BOOST_TEST( 0.0f == numeric_cast<float>( 0.0 ) );
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BOOST_TEST( 0.0 == numeric_cast<double>( 0.0 ) );
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// tests which should result in errors being detected
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BOOST_TEST_THROWS( numeric_cast<signed char>(large_value),
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numeric::bad_numeric_cast );
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BOOST_TEST_THROWS( numeric_cast<signed char>(large_negative_value),
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numeric::bad_numeric_cast );
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BOOST_TEST_THROWS( numeric_cast<signed char>(large_negative_value),
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numeric::bad_numeric_cast );
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BOOST_TEST_THROWS( numeric_cast<unsigned long>(small_negative_value),
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numeric::bad_numeric_cast );
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BOOST_TEST_THROWS( numeric_cast<int>(DBL_MAX), numeric::bad_numeric_cast );
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return boost::report_errors() ;
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} // main
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