From a461d5f0a3f7b1844ef84591826cf5c1065cc11c Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Mon, 30 Jan 2023 19:10:43 -0800
Subject: Don't try to use std::pointer_traits::to_address

---
 common/almalloc.h | 23 ++---------------------
 1 file changed, 2 insertions(+), 21 deletions(-)

diff --git a/common/almalloc.h b/common/almalloc.h
index 270cd76c..a795fc3b 100644
--- a/common/almalloc.h
+++ b/common/almalloc.h
@@ -108,21 +108,6 @@ template<typename T, std::size_t N, typename U, std::size_t M>
 constexpr bool operator!=(const allocator<T,N>&, const allocator<U,M>&) noexcept { return false; }
 
 
-namespace detail_ {
-    template<typename... Ts>
-    using void_t = void;
-
-    template<typename T, typename = void>
-    struct has_to_address_ : public std::false_type { };
-    template<typename T>
-    struct has_to_address_<T,
-        void_t<decltype(std::pointer_traits<T>::to_address(std::declval<const T&>()))>>
-        : public std::true_type
-    { };
-    template<typename T>
-    constexpr bool has_to_address = has_to_address_<T>::value;
-} // namespace detail_
-
 template<typename T>
 constexpr T *to_address(T *p) noexcept
 {
@@ -130,12 +115,8 @@ constexpr T *to_address(T *p) noexcept
     return p;
 }
 
-template<typename T, std::enable_if_t<detail_::has_to_address<T>,bool> = true>
-constexpr auto to_address(const T& p) noexcept
-{ return std::pointer_traits<T>::to_address(p); }
-
-template<typename T, std::enable_if_t<!detail_::has_to_address<T>,bool> = true>
-constexpr auto to_address(const T& p) noexcept
+template<typename T>
+constexpr auto to_address(const T &p) noexcept
 { return to_address(p.operator->()); }
 
 
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