allow pointer to member argument for array_size()

sthalik · Nov 15, 2024 · 2f9498d · 2f9498d
1 parent d2236d2
commit 2f9498d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/compat/array-size.hpp b/compat/array-size.hpp
@@ -9,6 +9,7 @@ template<typename T, size_t N> struct array_size_<T(*)[N]> : std::integral_const
 template<typename T, size_t N> struct array_size_<T[N]> : std::integral_constant<size_t, N> {};
 template<typename T, size_t N> struct array_size_<std::array<T, N>> : std::integral_constant<size_t, N> {};
 template<typename T, size_t N> struct array_size_<StaticArray<N, T>> : std::integral_constant<size_t, N> {};
+template<size_t N, class T, class U> constexpr std::size_t arraySize(U(T::*)[N]) { return N; }
 
 template<typename C, typename T> struct array_size_<T C::*> : std::integral_constant<size_t, array_size_<std::remove_cvref_t<T>>::value> {};