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/* Copyright 2023, The libsigc++ Development Team
* Assigned to public domain. Use as you wish without restriction.
*/
#include "testutilities.h"
#include <type_traits>
#include <sigc++/connection.h>
#include <sigc++/scoped_connection.h>
#include <sigc++/signal.h>
#include <sigc++/trackable.h>
// Test the expected special members and conversions, esp. NOT copyable BUT movable.
static_assert( std::is_nothrow_default_constructible_v<sigc::scoped_connection>);
static_assert(!std::is_copy_constructible_v <sigc::scoped_connection>);
static_assert(!std::is_copy_assignable_v <sigc::scoped_connection>);
static_assert( std::is_nothrow_move_constructible_v <sigc::scoped_connection>);
static_assert( std::is_move_assignable_v <sigc::scoped_connection>);
static_assert( std::is_nothrow_swappable_v <sigc::scoped_connection>);
// TODO: C++20: Test the stronger std::is_nothrow_convertible_v; it should pass.
static_assert( std::is_convertible_v<sigc::connection, sigc::scoped_connection>);
static_assert(!std::is_convertible_v<sigc::scoped_connection, sigc::connection>);
static_assert( std::is_assignable_v <sigc::scoped_connection, sigc::connection>);
static_assert(!std::is_assignable_v <sigc::connection, sigc::scoped_connection>);
namespace
{
std::ostringstream result_stream;
int
foo(int i)
{
result_stream << "foo(" << i << ") ";
return 1;
}
int
bar(double i)
{
result_stream << "bar(" << i << ") ";
return 1;
}
struct A : public sigc::trackable
{
int foo(int i)
{
result_stream << "A::foo(" << i << ") ";
return 1;
}
};
} // end anonymous namespace
int
main(int argc, char* argv[])
{
auto util = TestUtilities::get_instance();
if (!util->check_command_args(argc, argv))
return util->get_result_and_delete_instance() ? EXIT_SUCCESS : EXIT_FAILURE;
sigc::signal<int(int)> sig;
sigc::connection confoo;
sigc::connection conbar;
sigc::connection cona;
{
A a;
sig.connect(sigc::mem_fun(a, &A::foo));
conbar = sig.connect(&bar);
confoo = sig.connect_first(&foo);
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(1);
util->check_result(
result_stream, "sig is connected to (size=3): foo(1) A::foo(1) bar(1) ");
}
// normal connections are still connected. mem_fun disconnected via trackable.
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(2);
util->check_result(result_stream, "sig is connected to (size=2): foo(2) bar(2) ");
{
A a;
sig.connect(sigc::mem_fun(a, &A::foo));
sigc::scoped_connection sconfoo = sig.connect(&foo);
sigc::scoped_connection sconbar = sig.connect_first(&bar);
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(3);
util->check_result(
result_stream, "sig is connected to (size=5): bar(3) foo(3) bar(3) A::foo(3) foo(3) ");
}
// scoped connections are now disconnected.
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(4);
util->check_result(result_stream, "sig is connected to (size=2): foo(4) bar(4) ");
// copying connection to a scoped connection disconnects when latter destroyed
// copy-constructor:
{
sigc::scoped_connection sconfoo = confoo;
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(5);
util->check_result(
result_stream, "sig is connected to (size=2): foo(5) bar(5) ");
}
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(6);
util->check_result(
result_stream, "sig is connected to (size=1): bar(6) ");
// copy-assignment:
confoo = sig.connect(&foo);
{
sigc::scoped_connection sconfoo = sig.connect(&bar);
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(7);
util->check_result(
result_stream, "sig is connected to (size=3): bar(7) foo(7) bar(7) ");
// copy-assignment disconnects currently held connection & replaces with new
sconfoo = confoo;
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(8);
util->check_result(
result_stream, "sig is connected to (size=2): bar(8) foo(8) ");
}
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(9);
util->check_result(
result_stream, "sig is connected to (size=1): bar(9) ");
// moving scoped_connection transfers ownership/disconnection to destination
// move-constructor:
{
auto src = std::make_unique<sigc::scoped_connection>(sig.connect(&foo));
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(10);
util->check_result(
result_stream, "sig is connected to (size=2): bar(10) foo(10) ");
sigc::scoped_connection dst = std::move(*src);
src.reset(); // This will NOT disconnect from foo()
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(11);
util->check_result(
result_stream, "sig is connected to (size=2): bar(11) foo(11) ");
}
// move-assignment:
{
auto src = std::make_unique<sigc::scoped_connection>(sig.connect(&foo));
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(12);
util->check_result(
result_stream, "sig is connected to (size=2): bar(12) foo(12) ");
sigc::scoped_connection dst;
dst = std::move(*src);
src.reset(); // This will NOT disconnect from foo()
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(13);
util->check_result(
result_stream, "sig is connected to (size=2): bar(13) foo(13) ");
}
// dst from above is now destroyed
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(14);
util->check_result(
result_stream, "sig is connected to (size=1): bar(14) ");
// swap
sigc::scoped_connection sconfoo = sig.connect(&foo);
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(15);
util->check_result(
result_stream, "sig is connected to (size=2): bar(15) foo(15) ");
sigc::scoped_connection sconbar = sig.connect(&bar);
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(16);
util->check_result(
result_stream, "sig is connected to (size=3): bar(16) foo(16) bar(16) ");
swap(sconbar, sconfoo);
// disconnect sconbar, which was swapped to refer to &foo
sconbar.disconnect();
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(17);
util->check_result(
result_stream, "sig is connected to (size=2): bar(17) bar(17) ");
// manual disconnection
sconfoo.disconnect(); // was swapped to refer to 2nd &bar
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(18);
util->check_result(
result_stream, "sig is connected to (size=1): bar(18) ");
// release
sconfoo = sig.connect(&foo);
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(19);
util->check_result(
result_stream, "sig is connected to (size=2): bar(19) foo(19) ");
sigc::connection rconfoo = sconfoo.release();
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(20);
util->check_result(
result_stream, "sig is connected to (size=2): bar(20) foo(20) ");
rconfoo.disconnect();
result_stream << "sig is connected to (size=" << sig.size() << "): ";
sig(21);
util->check_result(
result_stream, "sig is connected to (size=1): bar(21) ");
return util->get_result_and_delete_instance() ? EXIT_SUCCESS : EXIT_FAILURE;
}
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