// Copyright (C) 2008 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#include <sstream>
#include <string>
#include <cstdlib>
#include <ctime>
#include <dlib/algs.h>
#include <dlib/metaprogramming.h>
#include "tester.h"
namespace
{
using namespace test;
using namespace dlib;
using namespace std;
logger dlog("test.metaprogramming");
void metaprogramming_test (
)
/*!
ensures
- runs tests on template metaprogramming objects and functions for compliance with the specs
!*/
{
print_spinner();
DLIB_TEST(is_signed_type<signed char>::value == true);
DLIB_TEST(is_signed_type<signed short>::value == true);
DLIB_TEST(is_signed_type<signed int>::value == true);
DLIB_TEST(is_signed_type<signed long>::value == true);
DLIB_TEST(is_unsigned_type<signed char>::value == false);
DLIB_TEST(is_unsigned_type<signed short>::value == false);
DLIB_TEST(is_unsigned_type<signed int>::value == false);
DLIB_TEST(is_unsigned_type<signed long>::value == false);
DLIB_TEST(is_unsigned_type<unsigned char>::value == true);
DLIB_TEST(is_unsigned_type<unsigned short>::value == true);
DLIB_TEST(is_unsigned_type<unsigned int>::value == true);
DLIB_TEST(is_unsigned_type<unsigned long>::value == true);
DLIB_TEST(is_signed_type<unsigned char>::value == false);
DLIB_TEST(is_signed_type<unsigned short>::value == false);
DLIB_TEST(is_signed_type<unsigned int>::value == false);
DLIB_TEST(is_signed_type<unsigned long>::value == false);
COMPILE_TIME_ASSERT(is_signed_type<signed char>::value == true);
COMPILE_TIME_ASSERT(is_signed_type<signed short>::value == true);
COMPILE_TIME_ASSERT(is_signed_type<signed int>::value == true);
COMPILE_TIME_ASSERT(is_signed_type<signed long>::value == true);
COMPILE_TIME_ASSERT(is_unsigned_type<signed char>::value == false);
COMPILE_TIME_ASSERT(is_unsigned_type<signed short>::value == false);
COMPILE_TIME_ASSERT(is_unsigned_type<signed int>::value == false);
COMPILE_TIME_ASSERT(is_unsigned_type<signed long>::value == false);
COMPILE_TIME_ASSERT(is_unsigned_type<unsigned char>::value == true);
COMPILE_TIME_ASSERT(is_unsigned_type<unsigned short>::value == true);
COMPILE_TIME_ASSERT(is_unsigned_type<unsigned int>::value == true);
COMPILE_TIME_ASSERT(is_unsigned_type<unsigned long>::value == true);
COMPILE_TIME_ASSERT(is_signed_type<unsigned char>::value == false);
COMPILE_TIME_ASSERT(is_signed_type<unsigned short>::value == false);
COMPILE_TIME_ASSERT(is_signed_type<unsigned int>::value == false);
COMPILE_TIME_ASSERT(is_signed_type<unsigned long>::value == false);
}
void test_call_if_valid()
{
int value = 0;
auto foo = [&](int a, int b) { value += a + b; };
auto bar = [&](std::string) { value++; };
auto baz = [&]() { value++; };
DLIB_TEST(value == 0);
DLIB_TEST(call_if_valid(baz));
DLIB_TEST(value == 1);
DLIB_TEST(!call_if_valid(foo));
DLIB_TEST(value == 1);
DLIB_TEST(!call_if_valid(bar));
DLIB_TEST(value == 1);
DLIB_TEST(call_if_valid(bar, "stuff"));
DLIB_TEST(value == 2);
DLIB_TEST(!call_if_valid(baz, "stuff"));
DLIB_TEST(value == 2);
DLIB_TEST(call_if_valid(foo, 3, 1));
DLIB_TEST(value == 6);
DLIB_TEST(!call_if_valid(bar, 3, 1));
DLIB_TEST(value == 6);
// make sure stateful lambdas are modified when called
value = 0;
int i = 0;
auto stateful = [&value, i]() mutable { ++i; value = i; };
DLIB_TEST(call_if_valid(stateful));
DLIB_TEST(value == 1);
DLIB_TEST(call_if_valid(stateful));
DLIB_TEST(value == 2);
DLIB_TEST(call_if_valid(stateful));
DLIB_TEST(value == 3);
}
class metaprogramming_tester : public tester
{
public:
metaprogramming_tester (
) :
tester ("test_metaprogramming",
"Runs tests on the metaprogramming objects and functions.")
{}
void perform_test (
)
{
metaprogramming_test();
test_call_if_valid();
}
} a;
}