LWG4557 Remove constexpr from owner_less and owner_before

Fixes NB US 75-138 (C++26 CD).

Author: burblebee

source/memory.tex

@@ -3468,9 +3468,9 @@
     constexpr long use_count() const noexcept;
     constexpr explicit operator bool() const noexcept;
     template<class U>
-      constexpr bool owner_before(const shared_ptr<U>& b) const noexcept;
+      bool owner_before(const shared_ptr<U>& b) const noexcept;
     template<class U>
-      constexpr bool owner_before(const weak_ptr<U>& b) const noexcept;
+      bool owner_before(const weak_ptr<U>& b) const noexcept;
     size_t owner_hash() const noexcept;
     template<class U>
       constexpr bool owner_equal(const shared_ptr<U>& b) const noexcept;
@@ -4076,8 +4076,8 @@
 
 \indexlibrarymember{owner_before}{shared_ptr}%
 \begin{itemdecl}
-template<class U> constexpr bool owner_before(const shared_ptr<U>& b) const noexcept;
-template<class U> constexpr bool owner_before(const weak_ptr<U>& b) const noexcept;
+template<class U> bool owner_before(const shared_ptr<U>& b) const noexcept;
+template<class U> bool owner_before(const weak_ptr<U>& b) const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -4793,9 +4793,9 @@
     constexpr bool expired() const noexcept;
     constexpr shared_ptr<T> lock() const noexcept;
     template<class U>
-      constexpr bool owner_before(const shared_ptr<U>& b) const noexcept;
+      bool owner_before(const shared_ptr<U>& b) const noexcept;
     template<class U>
-      constexpr bool owner_before(const weak_ptr<U>& b) const noexcept;
+      bool owner_before(const weak_ptr<U>& b) const noexcept;
     size_t owner_hash() const noexcept;
     template<class U>
       constexpr bool owner_equal(const shared_ptr<U>& b) const noexcept;
@@ -4992,8 +4992,8 @@
 
 \indexlibrarymember{owner_before}{weak_ptr}%
 \begin{itemdecl}
-template<class U> constexpr bool owner_before(const shared_ptr<U>& b) const noexcept;
-template<class U> constexpr bool owner_before(const weak_ptr<U>& b) const noexcept;
+template<class U> bool owner_before(const shared_ptr<U>& b) const noexcept;
+template<class U> bool owner_before(const weak_ptr<U>& b) const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -5067,26 +5067,26 @@
   template<class T = void> struct owner_less;
 
   template<class T> struct owner_less<shared_ptr<T>> {
-    constexpr bool operator()(const shared_ptr<T>&, const shared_ptr<T>&) const noexcept;
-    constexpr bool operator()(const shared_ptr<T>&, const weak_ptr<T>&) const noexcept;
-    constexpr bool operator()(const weak_ptr<T>&, const shared_ptr<T>&) const noexcept;
+    bool operator()(const shared_ptr<T>&, const shared_ptr<T>&) const noexcept;
+    bool operator()(const shared_ptr<T>&, const weak_ptr<T>&) const noexcept;
+    bool operator()(const weak_ptr<T>&, const shared_ptr<T>&) const noexcept;
   };
 
   template<class T> struct owner_less<weak_ptr<T>> {
-    constexpr bool operator()(const weak_ptr<T>&, const weak_ptr<T>&) const noexcept;
-    constexpr bool operator()(const shared_ptr<T>&, const weak_ptr<T>&) const noexcept;
-    constexpr bool operator()(const weak_ptr<T>&, const shared_ptr<T>&) const noexcept;
+    bool operator()(const weak_ptr<T>&, const weak_ptr<T>&) const noexcept;
+    bool operator()(const shared_ptr<T>&, const weak_ptr<T>&) const noexcept;
+    bool operator()(const weak_ptr<T>&, const shared_ptr<T>&) const noexcept;
   };
 
   template<> struct owner_less<void> {
     template<class T, class U>
-      constexpr bool operator()(const shared_ptr<T>&, const shared_ptr<U>&) const noexcept;
+      bool operator()(const shared_ptr<T>&, const shared_ptr<U>&) const noexcept;
     template<class T, class U>
-      constexpr bool operator()(const shared_ptr<T>&, const weak_ptr<U>&) const noexcept;
+      bool operator()(const shared_ptr<T>&, const weak_ptr<U>&) const noexcept;
     template<class T, class U>
-      constexpr bool operator()(const weak_ptr<T>&, const shared_ptr<U>&) const noexcept;
+      bool operator()(const weak_ptr<T>&, const shared_ptr<U>&) const noexcept;
     template<class T, class U>
-      constexpr bool operator()(const weak_ptr<T>&, const weak_ptr<U>&) const noexcept;
+      bool operator()(const weak_ptr<T>&, const weak_ptr<U>&) const noexcept;
 
     using is_transparent = @\unspec@;
   };