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update traits-test.cpp #12

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update traits-test.cpp #12

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29 changes: 29 additions & 0 deletions test/traits-test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -76,4 +76,33 @@ TEST_CASE("conversions") {
STATIC_CHECK(std::convertible_to<const BitSet::Iterator, const BitSet::ConstIterator>);
}

template <typename T, typename = decltype(std::declval<T>().flip())>
static short flip_help(int);

template <typename T>
static long flip_help(...);

template <typename T>
struct has_method_flip {
static constexpr bool value = std::is_same_v<decltype(flip_help<T>(0)), short>;
};

TEST_CASE("сonst BitSet should not allow changing value via flip") {
STATIC_REQUIRE(!has_method_flip<BitSet::ConstReference>::value);
}

template <typename T, typename = decltype(std::declval<T>() = bool{})>
static short eq_help(int);

template <typename T>
static long eq_help(...);

template <typename T>
struct has_method_equalize {
static constexpr bool value = std::is_same_v<decltype(eq_help<T>(0)), short>;
};

TEST_CASE("сonst BitSet should not allow changing value via =") {
STATIC_REQUIRE(!has_method_equalize<BitSet::ConstReference>::value);
}
} // namespace ct::test