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/*
* GridTools
*
* Copyright (c) 2014-2023, ETH Zurich
* All rights reserved.
*
* Please, refer to the LICENSE file in the root directory.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <gridtools/common/ct_dispatch.hpp>
#include <gtest/gtest.h>
namespace gridtools {
namespace {
TEST(ct_dispatch, smoke) {
auto testee = [](size_t n) { return ct_dispatch<10>([](auto n) { return decltype(n)::value; }, n); };
for (size_t i = 0; i != 10; ++i)
EXPECT_EQ(testee(i), i);
}
int counter = 0;
int count() {
++counter;
return 0;
}
template <size_t>
struct foo {
static int dummy;
};
template <size_t I>
int foo<I>::dummy = count();
void bar(int n) {
ct_dispatch<42>([](auto n) { (void)foo<decltype(n)::value>::dummy; }, n);
}
// check that foo is instantiated 42 times without even calling bar.
TEST(ct_dispatch, instantiations_number) { EXPECT_EQ(counter, 42); }
} // namespace
} // namespace gridtools
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