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// what: unit tests for variant type boost::any
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// who: contributed by Kevlin Henney
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// where: tested with BCC 5.5, MSVC 6.0, and g++ 2.95
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#include "boost/any.hpp"
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typedef test<const char *, void (*)()> test_case;
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typedef const test_case * test_case_iterator;
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extern const test_case_iterator begin, end;
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using namespace any_tests;
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tester<test_case_iterator> test_suite(begin, end);
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return test_suite() ? EXIT_SUCCESS : EXIT_FAILURE;
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namespace any_tests // test suite
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void test_default_ctor();
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void test_converting_ctor();
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void test_copy_ctor();
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void test_copy_assign();
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void test_converting_assign();
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void test_null_copying();
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void test_cast_to_reference();
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const test_case test_cases[] =
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{ "default construction", test_default_ctor },
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{ "single argument construction", test_converting_ctor },
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{ "copy construction", test_copy_ctor },
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{ "copy assignment operator", test_copy_assign },
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{ "converting assignment operator", test_converting_assign },
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{ "failed custom keyword cast", test_bad_cast },
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{ "swap member function", test_swap },
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{ "copying operations on a null", test_null_copying },
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{ "cast to reference types", test_cast_to_reference }
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const test_case_iterator begin = test_cases;
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const test_case_iterator end =
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test_cases + (sizeof test_cases / sizeof *test_cases);
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namespace any_tests // test definitions
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using namespace boost;
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void test_default_ctor()
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check_true(value.empty(), "empty");
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check_null(any_cast<int>(&value), "any_cast<int>");
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check_equal(value.type(), typeid(void), "type");
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void test_converting_ctor()
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std::string text = "test message";
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check_false(value.empty(), "empty");
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check_equal(value.type(), typeid(std::string), "type");
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check_null(any_cast<int>(&value), "any_cast<int>");
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check_non_null(any_cast<std::string>(&value), "any_cast<std::string>");
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any_cast<std::string>(value), text,
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"comparing cast copy against original text");
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any_cast<std::string>(&value), &text,
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"comparing address in copy against original text");
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std::string text = "test message";
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any original = text, copy = original;
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check_false(copy.empty(), "empty");
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check_equal(original.type(), copy.type(), "type");
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any_cast<std::string>(original), any_cast<std::string>(copy),
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"comparing cast copy against original");
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text, any_cast<std::string>(copy),
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"comparing cast copy against original text");
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any_cast<std::string>(&original),
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any_cast<std::string>(©),
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"comparing address in copy against original");
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void test_copy_assign()
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std::string text = "test message";
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any original = text, copy;
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any * assign_result = &(copy = original);
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check_false(copy.empty(), "empty");
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check_equal(original.type(), copy.type(), "type");
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any_cast<std::string>(original), any_cast<std::string>(copy),
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"comparing cast copy against cast original");
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text, any_cast<std::string>(copy),
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"comparing cast copy against original text");
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any_cast<std::string>(&original),
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any_cast<std::string>(©),
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"comparing address in copy against original");
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check_equal(assign_result, ©, "address of assignment result");
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void test_converting_assign()
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std::string text = "test message";
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any * assign_result = &(value = text);
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check_false(value.empty(), "type");
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check_equal(value.type(), typeid(std::string), "type");
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check_null(any_cast<int>(&value), "any_cast<int>");
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check_non_null(any_cast<std::string>(&value), "any_cast<std::string>");
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any_cast<std::string>(value), text,
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"comparing cast copy against original text");
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any_cast<std::string>(&value),
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"comparing address in copy against original text");
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check_equal(assign_result, &value, "address of assignment result");
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std::string text = "test message";
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any_cast<const char *>(value),
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"any_cast to incorrect type");
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std::string text = "test message";
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any original = text, swapped;
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std::string * original_ptr = any_cast<std::string>(&original);
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any * swap_result = &original.swap(swapped);
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check_true(original.empty(), "empty on original");
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check_false(swapped.empty(), "empty on swapped");
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check_equal(swapped.type(), typeid(std::string), "type");
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text, any_cast<std::string>(swapped),
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"comparing swapped copy against original text");
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check_non_null(original_ptr, "address in pre-swapped original");
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any_cast<std::string>(&swapped),
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"comparing address in swapped against original");
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check_equal(swap_result, &original, "address of swap result");
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void test_null_copying()
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any copied = null, assigned;
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check_true(null.empty(), "empty on null");
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check_true(copied.empty(), "empty on copied");
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check_true(assigned.empty(), "empty on copied");
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void test_cast_to_reference()
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int & ra = any_cast<int &>(a);
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int const & ra_c = any_cast<int const &>(a);
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int volatile & ra_v = any_cast<int volatile &>(a);
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int const volatile & ra_cv = any_cast<int const volatile&>(a);
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&ra == &ra_c && &ra == &ra_v && &ra == &ra_cv,
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"cv references to same obj");
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int const & rb_c = any_cast<int const &>(b);
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int const volatile & rb_cv = any_cast<int const volatile &>(b);
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check_true(&rb_c == &rb_cv, "cv references to copied const obj");
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check_true(&ra != &rb_c, "copies hold different objects");
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int incremented = any_cast<int>(a);
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check_true(incremented == 138, "increment by reference changes value");
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"any_cast to incorrect reference type");
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any_cast<const char &>(b),
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"any_cast to incorrect const reference type");
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// Copyright Kevlin Henney, 2000, 2001. All rights reserved.
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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)