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126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
//-----------------------------------------------------------------------------
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// boost-libs variant/test/variant_comparison_test.cpp source file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2003
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// Eric Friedman, Itay Maman
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#include "boost/variant/variant.hpp"
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#include "boost/test/minimal.hpp"
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <algorithm>
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#include <vector>
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#include "boost/detail/workaround.hpp"
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x0551))
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# pragma warn -lvc // temporary used for parameter warning
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#endif
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template <typename T>
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void assert_equality_comparable(
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const T& x, const T& y, const T& z
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)
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{
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// identity check
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BOOST_CHECK( !(&x == &y) || (x == y) );
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BOOST_CHECK( !(&x == &z) || (x == z) );
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BOOST_CHECK( !(&y == &z) || (y == z) );
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// reflexivity check
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BOOST_CHECK( (x == x) );
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BOOST_CHECK( (y == y) );
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BOOST_CHECK( (z == z) );
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// symmetry check
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BOOST_CHECK( !(x == y) || (y == x) );
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BOOST_CHECK( !(y == x) || (x == y) );
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BOOST_CHECK( !(x == z) || (z == x) );
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BOOST_CHECK( !(z == x) || (x == z) );
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BOOST_CHECK( !(y == z) || (z == y) );
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BOOST_CHECK( !(z == y) || (y == z) );
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// transitivity check
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BOOST_CHECK( !(x == y && y == z) || (x == z) );
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BOOST_CHECK( !(x == z && z == y) || (x == y) );
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BOOST_CHECK( !(y == z && z == x) || (y == x) );
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}
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template <typename T>
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void assert_less_than_comparable(
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const T& x, const T& y, const T& z
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)
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{
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// irreflexivity check
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BOOST_CHECK( !(x < x) );
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BOOST_CHECK( !(y < y) );
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BOOST_CHECK( !(z < z) );
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// transitivity check
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BOOST_CHECK( (x < y) );
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BOOST_CHECK( (y < z) );
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BOOST_CHECK( (x < z) );
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// antisymmetry check
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BOOST_CHECK( !(y < x) );
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BOOST_CHECK( !(z < y) );
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BOOST_CHECK( !(z < x) );
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}
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template <typename It>
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std::string print_range(It first, It last)
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{
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std::ostringstream result;
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while (first != last)
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{
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result << *first << ' ';
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++first;
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}
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return result.str();
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}
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int test_main(int , char* [])
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{
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typedef boost::variant<int, std::string> var_t;
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var_t var1(3);
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var_t var2(5);
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var_t var3("goodbye");
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var_t var4("hello");
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assert_equality_comparable(var1, var1, var1);
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assert_equality_comparable(var_t(var1), var_t(var1), var_t(var1));
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assert_equality_comparable(var1, var2, var3);
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assert_less_than_comparable(var1, var2, var3);
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assert_less_than_comparable(var2, var3, var4);
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std::vector<var_t> vec;
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vec.push_back( var3 );
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vec.push_back( var2 );
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vec.push_back( var4 );
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vec.push_back( var1 );
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std::sort(vec.begin(), vec.end());
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std::string sort_result( print_range(vec.begin(), vec.end()) );
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BOOST_CHECK( sort_result == "3 5 goodbye hello " );
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return boost::exit_success;
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}
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