// Invocation of pointers which supply the parameter type. Full invocation
// with paramters is posesible in this fashion with out knowing the class
// that the functor refers to.
void testGlobalReturnParams()
{
ArGlobalRetFunctor<bool> functor(retFunction);
ArGlobalRetFunctor1<char*, int> functor1(retFunction, 1);
ArGlobalRetFunctor2<double, bool, std::string>
functor2(retFunction, false, "default arg");
ArRetFunctor<bool> *fBoolPtr;
ArRetFunctor1<char*, int> *fCharPtr;
ArRetFunctor2<double, bool, std::string> *fDoublePtr;
bool bret;
char *cret;
double dret;
printf("\n****** Testing global pointer invocation with return\n");
fBoolPtr=&functor;
puts("> bool retFunction() should return true...");
bret=fBoolPtr->invokeR();
printf("Returned: %d\n", bret);
fCharPtr=&functor1;
puts("> char* retFunction(7) should return \"Hello\"...");
cret=fCharPtr->invokeR(7);
printf("Returned: %s\n", cret);
fDoublePtr=&functor2;
puts("> double retFunction(false, \"argument 3\") should return 4.62...");
dret=fDoublePtr->invokeR(false, "argument 3");
printf("Returned: %e\n", dret);
}
void testReturnParams()
{
TestClass test;
ArRetFunctorC<bool, TestClass> functor(test, &TestClass::retFunction);
ArRetFunctor1C<char*, TestClass, int>
functor1(test, &TestClass::retFunction, 1);
ArRetFunctor2C<double, TestClass, bool, std::string>
functor2(test, &TestClass::retFunction, false, "default arg");
ArRetFunctor<bool> *fBoolPtr;
ArRetFunctor1<char*, int> *fCharPtr;
ArRetFunctor2<double, bool, std::string> *fDoublePtr;
bool bret;
char *cret;
double dret;
printf("\n****** Testing pointer invocation with return\n");
fBoolPtr=&functor;
puts("> TestClass::retFunction() should return true");
bret=fBoolPtr->invokeR();
printf("Returned: %d\n", bret);
fCharPtr=&functor1;
puts("> TestClass::retFunction(7) should return \"Hello\"");
cret=fCharPtr->invokeR(7);
printf("Returned: %s\n", cret);
fDoublePtr=&functor2;
puts("> TestClass::retFunction(false, \"argument 3\") should return 4.62...");
dret=fDoublePtr->invokeR(false, "argument 3");
printf("Returned: %e\n", dret);
}
// Direct invocation of the functors with return values and supplying
// parameters. It is not posesible to have the operator() for functors with
// return values. This is due to limitations of C++ and different C++
// compilers where you can not overload return values in all cases.
void testReturnDirect()
{
TestClass test;
ArRetFunctorC<bool, TestClass> functor(test, &TestClass::retFunction);
ArRetFunctor1C<char*, TestClass, int>
functor1(test, &TestClass::retFunction, 1);
ArRetFunctor2C<double, TestClass, bool, std::string>
functor2(test, &TestClass::retFunction, false, "default arg");
bool bret;
char *cret;
double dret;
//bret=test.retFunction();
//cret=test.retFunction(4);
//dret=test.retFunction(true, "foof");
printf("\n****** Testing direct invocation with return\n");
puts("> TestClass::retFunction() should return true...");
bret=functor.invokeR();
printf("Returned: %d\n", bret);
puts("> TestClass::retFunction(5) should return \"Hello\"...");
cret=functor1.invokeR(5);
printf("Returned: %s\n", cret);
puts("> TestClass::retFunction(true, \"argument 1\") should return 4.62...");
dret=functor2.invokeR(true, "argument 1");
printf("Returned: %e\n", dret);
}
// Direct invocation of the global functors with supplying parameters.
void testGlobalDirect()
{
ArGlobalFunctor functor(&function);
ArGlobalFunctor1<int> functor1(&function, 1);
ArGlobalFunctor2<bool, std::string> functor2(&function,
false, "default arg");
printf("\n****** Testing global direct invocation\n");
puts("> Should see function()...");
functor.invoke();
puts("> Should see function(5)...");
functor1.invoke(5);
puts("> Should see function(true, \"argument 1\")...");
functor2.invoke(true, "argument 1");
}
// Invocation of a base ArFunctor pointer to a global functor. Because the
// pointer is of type ArFunctor, the parameters can not be supplied. The
// default parameters, which are supplied when the functor is constructed,
// are used.
void testGlobalBase()
{
ArFunctor *fptr;
ArGlobalFunctor functor(function);
ArGlobalFunctor1<int> functor1(function, 1);
ArGlobalFunctor2<bool, std::string> functor2(function, false,
"default arg");
printf("\n****** Testing global base invocation\n");
fptr=&functor;
puts("> Should see function()...");
fptr->invoke();
fptr=&functor1;
puts("> Should see function(1)...");
fptr->invoke();
fptr=&functor2;
puts("> Should see function(false, \"default arg\")...");
fptr->invoke();
}
// Direct invocation of the functors with supplying parameters.
void testDirect()
{
TestClass test;
ArFunctorC<TestClass> functor(test, &TestClass::function);
ArFunctor1C<TestClass, int> functor1(test, &TestClass::function, 1);
ArFunctor2C<TestClass, bool, std::string> functor2(test,
&TestClass::function,
false, "default arg");
printf("\n****** Testing direct invocation using ArFunctor::invoke(...)\n");
puts("> Should see TestClass::function()...");
functor.invoke();
puts("> Should see TestClass::function(1)...");
functor1.invoke();
puts("> Should see TestClass::function(5)...");
functor1.invoke(5);
puts("> Should see TestClass::function(true, \"argument 1\")...");
functor2.invoke(true, "argument 1");
}
// Direct invocation of the global functors with supplying parameters.
void testGlobalReturnDirect()
{
ArGlobalRetFunctor<bool> functor(&retFunction);
ArGlobalRetFunctor1<char*, int> functor1(&retFunction, 1);
ArGlobalRetFunctor2<double, bool, std::string>
functor2(&retFunction, false, "default arg");
bool bret;
char *cret;
double dret;
printf("\n****** Testing global direct invocation with return\n");
puts("> bool retFunction() should return true...");
bret=functor.invokeR();
printf("Returned: %d\n", bret);
puts("> char* retFunction(5) should return \"Hello\"...");
cret=functor1.invokeR(5);
printf("Returned: %s\n", cret);
puts("> double retFunction(true, \"argument 1\") should return 4.62...");
dret=functor2.invokeR(true, "argument 1");
printf("Returned: %e\n", dret);
}
// Invocation of pointers which supply the parameter type. Full invocation
// with paramters is posesible in this fashion with out knowing the class
// that the functor refers to.
void testGlobalParams()
{
ArGlobalFunctor functor(function);
ArGlobalFunctor1<int> functor1(function, 1);
ArGlobalFunctor2<bool, std::string> functor2(function, false,
"default arg");
ArFunctor *fptr;
ArFunctor1<int> *fptr1;
ArFunctor2<bool, std::string> *fptr2;
printf("\n****** Testing global pointer invocation\n");
fptr=&functor;
puts("> Should see function()...");
fptr->invoke();
fptr1=&functor1;
puts("> Should see function(2)...");
fptr1->invoke(2);
fptr2=&functor2;
puts("> Should see function(true, \"argument 2\")...");
fptr2->invoke(true, "argument 2");
}
// Invocation of a base ArFunctor pointer to a functor. Because the pointer
// is of type ArFunctor, the parameters can not be supplied. The default
// parameters, which are supplied when the functor is constructed, are used.
void testBase()
{
TestClass test;
ArFunctor *fptr;
ArFunctorC<TestClass> functor(test, &TestClass::function);
ArFunctor1C<TestClass, int> functor1(test, &TestClass::function, 1);
ArFunctor2C<TestClass, bool, std::string> functor2(test,
&TestClass::function,
false, "default arg");
printf("\n****** Testing base invocation\n");
fptr=&functor;
puts("> Should see TestClass::function()...");
fptr->invoke();
fptr=&functor1;
puts("> Should see TestClass::function(1)...");
fptr->invoke();
fptr=&functor2;
puts("> Should see TestClass::function(false, \"default arg\")...");
fptr->invoke();
}
int main()
{
CallbackClass cb;
// For functors with no arguments:
std::list<ArFunctor*> functors;
ArFunctorC<CallbackClass> functor1(cb, &CallbackClass::callback1);
functors.push_back(&functor1);
functors.push_back(&functor1);
functors.push_back(&functor1);
std::for_each(functors.begin(), functors.end(),
std::mem_fun(&ArFunctor::invoke));
// For functors with arguments, give mem_fun template parameters.
std::list<ArFunctor1<int>*> functorsWithArg;
ArFunctor1C<CallbackClass, int> functor2(cb, &CallbackClass::callback2);
std::mem_fun1_t<void, ArFunctor1<int>, int> f(&ArFunctor1<int>::invoke);
functorsWithArg.push_back(&functor2);
functorsWithArg.push_back(&functor2);
functorsWithArg.push_back(&functor2);
std::for_each(functorsWithArg.begin(), functorsWithArg.end(), std::bind2nd(f, 42));
// You can use other STL algorithms if your functor returns something.
// count_if will invoke each functor, and return the number of functor
// invocations that returned true (in this case, 3, since they will
// always return true)
std::list<ArRetFunctor1<bool, const char*>*> functorsWithRet;
ArRetFunctor1C<bool, CallbackClass, const char *>
functor3(cb, &CallbackClass::callback3);
std::mem_fun1_t<bool, ArRetFunctor1<bool, const char*>, const char*> rf(&ArRetFunctor1<bool, const char*>::invokeR);
functorsWithRet.push_back(&functor3);
functorsWithRet.push_back(&functor3);
functorsWithRet.push_back(&functor3);
int c = std::count_if(functorsWithRet.begin(), functorsWithRet.end(), std::bind2nd(rf, "testing"));
std::cout << "Count=" << c << std::endl;
return(0);
}
// Invocation of pointers which supply the parameter type. Full invocation
// with paramters is posesible in this fashion with out knowing the class
// that the functor refers to.
void testParams()
{
TestClass test;
ArFunctorC<TestClass> functor(test, &TestClass::function);
ArFunctor1C<TestClass, int> functor1(test, &TestClass::function);
ArFunctor2C<TestClass, bool, std::string> functor2(test,
&TestClass::function);
ArFunctor *fptr;
ArFunctor1<int> *fptr1;
ArFunctor2<bool, std::string> *fptr2;
printf("\n****** Testing pointer invocation\n");
fptr=&functor;
puts("> Should see TestClass::function()...");
fptr->invoke();
fptr1=&functor1;
puts("> Should see TestClass::function(2)...");
fptr1->invoke(2);
fptr2=&functor2;
puts("> Should see TestClass::function(true, \"argument 2\")...");
fptr2->invoke(true, "argument 2");
}
int main()
{
CallbackContainer cb;
DriverClass driver;
ArFunctorC<CallbackContainer> functor1(cb, &CallbackContainer::callback1);
ArFunctor1C<CallbackContainer, int> functor2(cb, &CallbackContainer::callback2);
ArRetFunctor1C<bool, CallbackContainer, const char *>
functor3(cb, &CallbackContainer::callback3);
driver.setCallback1(&functor1);
driver.setCallback2(&functor2);
driver.setCallback3(&functor3);
driver.invokeFunctors();
/* You can make functors that target global functions too. */
ArGlobalFunctor globalFunctor(&globalCallback);
printf("Invoking globalFunctor... ");
globalFunctor.invoke();
/* You can also include the values of arguments in an ArFunctor object, if you
* want to use the same value in every invocation of the functor.
*/
ArFunctor1C<CallbackContainer, int> functor4(cb, &CallbackContainer::callback2, 42);
printf("Invoking functor with constant argument... ");
functor4.invoke();
/* Functors can be downcast to parent interface classes, as long as their invocation
* does not require arguments.
*/
ArFunctor* baseFunctor = &functor4;
printf("Invoking downcast functor... ");
baseFunctor->invoke();
return(0);
}