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✨ Add same_any and same_none concepts #208

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Merged
elbeno merged 1 commit into from
Mar 19, 2025
Merged

✨ Add same_any and same_none concepts #208

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17 changes: 17 additions & 0 deletions include/stdx/concepts.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,12 @@ constexpr auto derived_from =
template <typename T, typename U>
constexpr auto same_as = std::is_same_v<T, U> and std::is_same_v<U, T>;

template <typename T, typename... Us>
constexpr auto same_any = (... or same_as<T, Us>);

template <typename T, typename... Us>
constexpr auto same_none = not same_any<T, Us...>;

template <typename T, typename U>
constexpr auto same_as_unqualified =
is_same_unqualified_v<T, U> and is_same_unqualified_v<U, T>;
Expand Down Expand Up @@ -130,6 +136,12 @@ concept derived_from =
template <typename T, typename U>
concept same_as = std::is_same_v<T, U> and std::is_same_v<U, T>;

template <typename T, typename... Us>
constexpr auto same_any = (... or same_as<T, Us>);

template <typename T, typename... Us>
constexpr auto same_none = not same_any<T, Us...>;

template <typename T, typename U>
concept same_as_unqualified =
is_same_unqualified_v<T, U> and is_same_unqualified_v<U, T>;
Expand Down Expand Up @@ -222,6 +234,11 @@ concept same_as_unqualified =
template <typename T>
concept structural = is_structural_v<T>;

template <typename T, typename... Us>
constexpr auto same_any = (... or same_as<T, Us>);

template <typename T, typename... Us>
constexpr auto same_none = not same_any<T, Us...>;
} // namespace v1
} // namespace stdx

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10 changes: 10 additions & 0 deletions test/concepts.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,16 @@ TEST_CASE("same_as", "[concepts]") {
static_assert(not stdx::same_as<float, int>);
}

TEST_CASE("same_any", "[concepts]") {
static_assert(stdx::same_any<int, float, bool, int>);
static_assert(not stdx::same_any<float, char, bool, int>);
}

TEST_CASE("same_none", "[concepts]") {
static_assert(stdx::same_none<int, float, bool, char>);
static_assert(not stdx::same_none<float, bool, char, float>);
}

TEST_CASE("same_as_unqualified", "[concepts]") {
static_assert(stdx::same_as_unqualified<int, int>);
static_assert(not stdx::same_as_unqualified<int, void>);
Expand Down