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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkMacro.h"
#include <iostream>
#include <type_traits>
static_assert(std::is_nothrow_default_constructible_v<itk::ExceptionObject>,
"ExceptionObject must have a noexcept default-constructor!");
static_assert(std::is_nothrow_copy_assignable_v<itk::ExceptionObject> &&
std::is_nothrow_copy_constructible_v<itk::ExceptionObject>,
"An exception type must have noexcept copy semantics!");
class mammal
{
public:
virtual int
GetType() = 0;
virtual bool
operator==(mammal &);
mammal() = default;
virtual ~mammal() = default;
};
class human : public mammal
{
public:
int
GetType() override
{
return 32;
}
};
class naked_mole_rat : public mammal
{
public:
int
GetType() override
{
return 2;
}
};
bool
mammal::operator==(mammal & o)
{
if (this->GetType() != o.GetType())
{
itk::IncompatibleOperandsError e(__FILE__, __LINE__);
e.SetLocation("bool mammal::operator==(mammal&, mammal&)");
e.SetDescription("Cannot compare mammals of unequal type");
throw e;
}
return true;
}
int
lookup(const int i)
{
static int table[5] = { 23, 42, 42, 32, 12 };
if (!(0 <= i && i < 5))
{
itk::RangeError e(__FILE__, __LINE__);
e.SetLocation("int lookup(const int )");
e.SetDescription("Attempted to access out-of-bounds array element");
throw e;
}
return table[i];
}
int
itkExceptionObjectTest(int, char *[])
{
// SOME BASIC TESTS OF THE itk::ExceptionObject 's
itk::RangeError E;
E.SetLocation("itkExceptionObjectTest(int, char**)");
E.SetDescription("E");
std::cout << E << std::endl;
itk::RangeError F(E);
std::cout << F << std::endl;
itk::RangeError G;
G.SetLocation("itkExceptionObjectTest(int, char**)");
G.SetDescription("G");
std::cout << "F==G? " << (F == G) << std::endl;
E = F = G;
std::cout << F << std::endl;
std::cout << "F==G? " << (F == G) << std::endl;
auto * Ep = new itk::RangeError;
Ep->SetLocation("itkExceptionObjectTest(int, char**)");
Ep->SetDescription("Ep");
auto * Fp = new itk::RangeError;
*Fp = *Ep;
delete Ep;
std::cout << *Fp << std::endl;
// ** BE SURE TO CATCH BY REFERENCE TO AVOID SLICING **
bool raised = false;
try
{
lookup(4); // OK
lookup(12); // ERROR
}
catch (const itk::ExceptionObject & e)
{
std::cout << e << std::endl;
raised = true;
}
if (!raised)
{
return EXIT_FAILURE;
}
raised = false;
bool OneShouldFail = true;
try
{
human john, jane;
naked_mole_rat hal;
OneShouldFail &= (john == john); // OK
OneShouldFail &= (jane == john); // OK
// NOTE: (hal == john) throws an exception, and does not actually return false!
// This means that the &= operator below is never executed, and
// the OneShouldFail variable is never actually set to false!
OneShouldFail &= (hal == john); // ERROR
}
catch (const itk::IncompatibleOperandsError & e)
{
std::cout << e << std::endl;
raised = true;
}
if (!raised || OneShouldFail == false)
{
return EXIT_FAILURE;
}
/*
// SAMPLE ERROR STUFF
itk::SampleError Se;
Se.SetLocation("SE LOCATION");
Se.SetDescription("SE DESCRIPTION");
itk::SampleError Sf(Se);
itk::SampleError Sg;
Sg = Sf;
std::cout << Sg << std::endl;
try
{
itk::SampleError E;
E.SetLocation("djibouti");
E.SetDescription("sample error");
throw E;
}
catch (const itk::ExceptionObject &e) { std::cout << e << std::endl; }
*/
delete Fp;
return EXIT_SUCCESS;
}
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