700 lines
14 KiB
C++
700 lines
14 KiB
C++
// Boost.Function library
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// Copyright Douglas Gregor 2001-2003. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org
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#include <boost/function.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <functional>
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#include <cassert>
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#include <string>
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#define BOOST_CHECK BOOST_TEST
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using namespace boost;
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using std::string;
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using std::negate;
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int global_int;
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struct write_five_obj { void operator()() const { global_int = 5; } };
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struct write_three_obj { int operator()() const { global_int = 3; return 7; }};
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static void write_five() { global_int = 5; }
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static void write_three() { global_int = 3; }
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struct generate_five_obj { int operator()() const { return 5; } };
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struct generate_three_obj { int operator()() const { return 3; } };
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static int generate_five() { return 5; }
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static int generate_three() { return 3; }
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static string identity_str(const string& s) { return s; }
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static string string_cat(const string& s1, const string& s2) { return s1+s2; }
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static int sum_ints(int x, int y) { return x+y; }
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struct write_const_1_nonconst_2
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{
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void operator()() { global_int = 2; }
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void operator()() const { global_int = 1; }
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};
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struct add_to_obj
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{
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add_to_obj(int v) : value(v) {}
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int operator()(int x) const { return value + x; }
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int value;
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};
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static void
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test_zero_args()
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{
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typedef function0<void> func_void_type;
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write_five_obj five = write_five_obj(); // Initialization for Borland C++ 5.5
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write_three_obj three = write_three_obj(); // Ditto
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// Default construction
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func_void_type v1;
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BOOST_CHECK(v1.empty());
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// Assignment to an empty function
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v1 = five;
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BOOST_CHECK(!v1.empty());
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// Invocation of a function
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 5);
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// clear() method
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v1.clear();
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BOOST_CHECK(!v1);
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// Assignment to an empty function
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v1 = three;
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BOOST_CHECK(!v1.empty());
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// Invocation and self-assignment
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global_int = 0;
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v1 = v1;
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v1();
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BOOST_CHECK(global_int == 3);
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// Assignment to a non-empty function
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v1 = five;
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// Invocation and self-assignment
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global_int = 0;
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v1 = (v1);
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v1();
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BOOST_CHECK(global_int == 5);
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// clear
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v1 = 0;
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BOOST_CHECK(v1.empty());
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// Assignment to an empty function from a free function
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v1 = &write_five;
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BOOST_CHECK(!v1.empty());
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// Invocation
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v1 = &write_three;
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BOOST_CHECK(!v1.empty());
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// Invocation
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 3);
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// Assignment
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v1 = five;
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BOOST_CHECK(!v1.empty());
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// Invocation
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v1 = write_three;
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BOOST_CHECK(!v1.empty());
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// Invocation
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 3);
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// Construction from another function (that is empty)
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v1.clear();
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func_void_type v2(v1);
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BOOST_CHECK(!v2? true : false);
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// Assignment to an empty function
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v2 = three;
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BOOST_CHECK(!v2.empty());
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// Invocation
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 3);
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// Assignment to a non-empty function
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v2 = (five);
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// Invocation
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 5);
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v2.clear();
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BOOST_CHECK(v2.empty());
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// Assignment to an empty function from a free function
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v2 = (&write_five);
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BOOST_CHECK(v2? true : false);
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// Invocation
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v2 = &write_three;
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BOOST_CHECK(!v2.empty());
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// Invocation
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 3);
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// Swapping
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v1 = five;
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swap(v1, v2);
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v2();
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BOOST_CHECK(global_int == 5);
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v1();
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BOOST_CHECK(global_int == 3);
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swap(v1, v2);
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v1.clear();
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// Assignment
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v2 = five;
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BOOST_CHECK(!v2.empty());
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// Invocation
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v2 = &write_three;
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BOOST_CHECK(!v2.empty());
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// Invocation
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 3);
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// Assignment to a function from an empty function
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v2 = v1;
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BOOST_CHECK(v2.empty());
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// Assignment to a function from a function with a functor
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v1 = three;
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v2 = v1;
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BOOST_CHECK(!v1.empty());
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BOOST_CHECK(!v2.empty());
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// Invocation
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 3);
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 3);
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// Assign to a function from a function with a function
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v2 = &write_five;
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v1 = v2;
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BOOST_CHECK(!v1.empty());
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BOOST_CHECK(!v2.empty());
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global_int = 0;
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v1();
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BOOST_CHECK(global_int == 5);
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global_int = 0;
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v2();
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BOOST_CHECK(global_int == 5);
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// Construct a function given another function containing a function
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func_void_type v3(v1);
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// Invocation of a function
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global_int = 0;
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v3();
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BOOST_CHECK(global_int == 5);
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// clear() method
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v3.clear();
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BOOST_CHECK(!v3? true : false);
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// Assignment to an empty function
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v3 = three;
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BOOST_CHECK(!v3.empty());
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// Invocation
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global_int = 0;
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v3();
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BOOST_CHECK(global_int == 3);
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// Assignment to a non-empty function
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v3 = five;
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// Invocation
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global_int = 0;
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v3();
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BOOST_CHECK(global_int == 5);
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// clear()
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v3.clear();
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BOOST_CHECK(v3.empty());
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// Assignment to an empty function from a free function
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v3 = &write_five;
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BOOST_CHECK(!v3.empty());
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// Invocation
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global_int = 0;
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v3();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v3 = &write_three;
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BOOST_CHECK(!v3.empty());
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// Invocation
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global_int = 0;
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v3();
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BOOST_CHECK(global_int == 3);
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// Assignment
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v3 = five;
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BOOST_CHECK(!v3.empty());
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// Invocation
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global_int = 0;
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v3();
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BOOST_CHECK(global_int == 5);
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// Construction of a function from a function containing a functor
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func_void_type v4(v3);
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// Invocation of a function
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global_int = 0;
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v4();
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BOOST_CHECK(global_int == 5);
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// clear() method
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v4.clear();
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BOOST_CHECK(v4.empty());
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// Assignment to an empty function
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v4 = three;
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BOOST_CHECK(!v4.empty());
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// Invocation
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global_int = 0;
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v4();
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BOOST_CHECK(global_int == 3);
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// Assignment to a non-empty function
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v4 = five;
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// Invocation
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global_int = 0;
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v4();
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BOOST_CHECK(global_int == 5);
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// clear()
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v4.clear();
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BOOST_CHECK(v4.empty());
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// Assignment to an empty function from a free function
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v4 = &write_five;
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BOOST_CHECK(!v4.empty());
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// Invocation
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global_int = 0;
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v4();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v4 = &write_three;
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BOOST_CHECK(!v4.empty());
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// Invocation
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global_int = 0;
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v4();
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BOOST_CHECK(global_int == 3);
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// Assignment
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v4 = five;
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BOOST_CHECK(!v4.empty());
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// Invocation
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global_int = 0;
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v4();
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BOOST_CHECK(global_int == 5);
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// Construction of a function from a functor
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func_void_type v5(five);
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// Invocation of a function
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global_int = 0;
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v5();
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BOOST_CHECK(global_int == 5);
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// clear() method
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v5.clear();
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BOOST_CHECK(v5.empty());
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// Assignment to an empty function
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v5 = three;
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BOOST_CHECK(!v5.empty());
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// Invocation
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global_int = 0;
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v5();
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BOOST_CHECK(global_int == 3);
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// Assignment to a non-empty function
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v5 = five;
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// Invocation
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global_int = 0;
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v5();
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BOOST_CHECK(global_int == 5);
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// clear()
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v5.clear();
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BOOST_CHECK(v5.empty());
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// Assignment to an empty function from a free function
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v5 = &write_five;
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BOOST_CHECK(!v5.empty());
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// Invocation
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global_int = 0;
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v5();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v5 = &write_three;
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BOOST_CHECK(!v5.empty());
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// Invocation
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global_int = 0;
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v5();
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BOOST_CHECK(global_int == 3);
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// Assignment
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v5 = five;
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BOOST_CHECK(!v5.empty());
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// Invocation
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global_int = 0;
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v5();
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BOOST_CHECK(global_int == 5);
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// Construction of a function from a function
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func_void_type v6(&write_five);
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// Invocation of a function
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global_int = 0;
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v6();
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BOOST_CHECK(global_int == 5);
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// clear() method
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v6.clear();
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BOOST_CHECK(v6.empty());
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// Assignment to an empty function
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v6 = three;
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BOOST_CHECK(!v6.empty());
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// Invocation
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global_int = 0;
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v6();
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BOOST_CHECK(global_int == 3);
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// Assignment to a non-empty function
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v6 = five;
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// Invocation
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global_int = 0;
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v6();
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BOOST_CHECK(global_int == 5);
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// clear()
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v6.clear();
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BOOST_CHECK(v6.empty());
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// Assignment to an empty function from a free function
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v6 = &write_five;
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BOOST_CHECK(!v6.empty());
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// Invocation
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global_int = 0;
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v6();
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BOOST_CHECK(global_int == 5);
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// Assignment to a non-empty function from a free function
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v6 = &write_three;
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BOOST_CHECK(!v6.empty());
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// Invocation
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global_int = 0;
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v6();
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BOOST_CHECK(global_int == 3);
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// Assignment
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v6 = five;
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BOOST_CHECK(!v6.empty());
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// Invocation
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global_int = 0;
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v6();
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BOOST_CHECK(global_int == 5);
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// Const vs. non-const
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// Initialization for Borland C++ 5.5
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write_const_1_nonconst_2 one_or_two = write_const_1_nonconst_2();
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const function0<void> v7(one_or_two);
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function0<void> v8(one_or_two);
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global_int = 0;
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v7();
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BOOST_CHECK(global_int == 2);
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global_int = 0;
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v8();
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BOOST_CHECK(global_int == 2);
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// Test construction from 0 and comparison to 0
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func_void_type v9(0);
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BOOST_CHECK(v9 == 0);
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# if !defined(__SUNPRO_CC) || __SUNPRO_CC > 0x540 || defined(BOOST_STRICT_CONFIG)
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BOOST_CHECK(0 == v9);
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#else
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BOOST_CHECK(v9.empty());
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#endif
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// Test return values
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typedef function0<int> func_int_type;
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// Initialization for Borland C++ 5.5
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generate_five_obj gen_five = generate_five_obj();
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generate_three_obj gen_three = generate_three_obj();
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func_int_type i0(gen_five);
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BOOST_CHECK(i0() == 5);
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i0 = gen_three;
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BOOST_CHECK(i0() == 3);
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i0 = &generate_five;
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BOOST_CHECK(i0() == 5);
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i0 = &generate_three;
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BOOST_CHECK(i0() == 3);
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BOOST_CHECK(i0? true : false);
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i0.clear();
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BOOST_CHECK(!i0? true : false);
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// Test return values with compatible types
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typedef function0<long> func_long_type;
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func_long_type i1(gen_five);
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BOOST_CHECK(i1() == 5);
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i1 = gen_three;
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BOOST_CHECK(i1() == 3);
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i1 = &generate_five;
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BOOST_CHECK(i1() == 5);
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i1 = &generate_three;
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BOOST_CHECK(i1() == 3);
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BOOST_CHECK(i1? true : false);
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i1.clear();
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BOOST_CHECK(!i1? true : false);
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}
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static void
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test_one_arg()
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{
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negate<int> neg = negate<int>(); // Initialization for Borland C++ 5.5
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function1<int, int> f1(neg);
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BOOST_CHECK(f1(5) == -5);
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function1<string, string> id(&identity_str);
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BOOST_CHECK(id("str") == "str");
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function1<std::string, const char*> id2(&identity_str);
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BOOST_CHECK(id2("foo") == "foo");
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add_to_obj add_to(5);
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function1<int, int> f2(add_to);
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BOOST_CHECK(f2(3) == 8);
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const function1<int, int> cf2(add_to);
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BOOST_CHECK(cf2(3) == 8);
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}
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static void
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test_two_args()
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{
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function2<string, const string&, const string&> cat(&string_cat);
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BOOST_CHECK(cat("str", "ing") == "string");
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function2<int, short, short> sum(&sum_ints);
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BOOST_CHECK(sum(2, 3) == 5);
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}
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static void
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test_emptiness()
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{
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function0<float> f1;
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BOOST_CHECK(f1.empty());
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function0<float> f2;
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f2 = f1;
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BOOST_CHECK(f2.empty());
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function0<double> f3;
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f3 = f2;
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BOOST_CHECK(f3.empty());
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}
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struct X {
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X(int v) : value(v) {}
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int twice() const { return 2*value; }
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int plus(int v) { return value + v; }
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int value;
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};
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static void
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test_member_functions()
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{
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boost::function1<int, X*> f1(&X::twice);
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X one(1);
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X five(5);
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BOOST_CHECK(f1(&one) == 2);
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BOOST_CHECK(f1(&five) == 10);
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boost::function1<int, X*> f1_2;
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f1_2 = &X::twice;
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BOOST_CHECK(f1_2(&one) == 2);
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BOOST_CHECK(f1_2(&five) == 10);
|
|
|
|
boost::function2<int, X&, int> f2(&X::plus);
|
|
BOOST_CHECK(f2(one, 3) == 4);
|
|
BOOST_CHECK(f2(five, 4) == 9);
|
|
}
|
|
|
|
struct add_with_throw_on_copy {
|
|
int operator()(int x, int y) const { return x+y; }
|
|
|
|
add_with_throw_on_copy() {}
|
|
|
|
add_with_throw_on_copy(const add_with_throw_on_copy&)
|
|
{
|
|
throw std::runtime_error("But this CAN'T throw");
|
|
}
|
|
|
|
add_with_throw_on_copy& operator=(const add_with_throw_on_copy&)
|
|
{
|
|
throw std::runtime_error("But this CAN'T throw");
|
|
}
|
|
};
|
|
|
|
static void
|
|
test_ref()
|
|
{
|
|
add_with_throw_on_copy atc;
|
|
try {
|
|
boost::function2<int, int, int> f(ref(atc));
|
|
BOOST_CHECK(f(1, 3) == 4);
|
|
}
|
|
catch(std::runtime_error const&) {
|
|
BOOST_ERROR("Nonthrowing constructor threw an exception");
|
|
}
|
|
}
|
|
|
|
static unsigned construction_count = 0;
|
|
static unsigned destruction_count = 0;
|
|
|
|
struct MySmallFunctor {
|
|
MySmallFunctor() { ++construction_count; }
|
|
MySmallFunctor(const MySmallFunctor &) { ++construction_count; }
|
|
~MySmallFunctor() { ++destruction_count; }
|
|
int operator()() { return 0; }
|
|
};
|
|
|
|
struct MyLargeFunctor {
|
|
MyLargeFunctor() { ++construction_count; }
|
|
MyLargeFunctor(const MyLargeFunctor &) { ++construction_count; }
|
|
~MyLargeFunctor() { ++destruction_count; }
|
|
int operator()() { return 0; }
|
|
|
|
float data[128];
|
|
};
|
|
|
|
void test_construct_destroy_count()
|
|
{
|
|
{
|
|
boost::function0<int> f;
|
|
boost::function0<int> g;
|
|
f = MySmallFunctor();
|
|
g = MySmallFunctor();
|
|
f.swap(g);
|
|
}
|
|
|
|
// MySmallFunctor objects should be constructed as many times as
|
|
// they are destroyed.
|
|
BOOST_CHECK(construction_count == destruction_count);
|
|
|
|
construction_count = 0;
|
|
destruction_count = 0;
|
|
{
|
|
boost::function0<int> f;
|
|
boost::function0<int> g;
|
|
f = MyLargeFunctor();
|
|
g = MyLargeFunctor();
|
|
f.swap(g);
|
|
}
|
|
|
|
// MyLargeFunctor objects should be constructed as many times as
|
|
// they are destroyed.
|
|
BOOST_CHECK(construction_count == destruction_count);
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test_zero_args();
|
|
test_one_arg();
|
|
test_two_args();
|
|
test_emptiness();
|
|
test_member_functions();
|
|
test_ref();
|
|
test_construct_destroy_count();
|
|
return boost::report_errors();
|
|
}
|