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✨ Add a couple of useful name utilities #422

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Merged
elbeno merged 1 commit into from
Sep 17, 2026
Merged

✨ Add a couple of useful name utilities #422

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20 changes: 20 additions & 0 deletions include/stdx/ct_string.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -202,5 +202,25 @@ concept named = requires {
template <named T> constexpr auto name_of_v = T::name;
template <named T> using constant_name_of_t = cts_t<T::name>;
template <named T> constexpr auto constant_name_of_v = constant_name_of_t<T>{};

template <typename T, stdx::ct_string Name>
concept matching_name = T::name == Name;

template <typename T, stdx::ct_string Name>
using matching_name_t = std::bool_constant<matching_name<T, Name>>;

template <stdx::ct_string N> struct matching_name_q {
template <typename T> using fn = matching_name_t<T, N>;
};

template <typename T, typename U>
concept same_name = named<T> and named<U> and matching_name<T, name_of_v<U>>;

template <typename T, typename U>
using same_name_t = std::bool_constant<same_name<T, U>>;

template <named T> struct same_name_q {
template <named U> using fn = same_name_t<T, U>;
};
} // namespace v1
} // namespace stdx
12 changes: 12 additions & 0 deletions test/ct_string.cpp
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Expand Up @@ -199,4 +199,16 @@ TEST_CASE("named object", "[ct_string]") {
STATIC_CHECK(stdx::named<T>);
STATIC_CHECK(stdx::name_of_v<T> == "test"_cts);
STATIC_CHECK(stdx::constant_name_of_v<T> == "test"_ctst);

STATIC_CHECK(stdx::matching_name<T, "test">);
STATIC_CHECK(stdx::matching_name_t<T, "test">::value);
STATIC_CHECK(stdx::matching_name_q<"test">::template fn<T>::value);

using U = stdx::with_name<"not test">;
STATIC_CHECK(stdx::same_name<T, T>);
STATIC_CHECK(stdx::same_name_t<T, T>::value);
STATIC_CHECK(stdx::same_name_q<T>::template fn<T>::value);
STATIC_CHECK(not stdx::same_name<T, U>);
STATIC_CHECK(not stdx::same_name_t<T, U>::value);
STATIC_CHECK(not stdx::same_name_q<T>::template fn<U>::value);
}