Fix increasing_allocator to conform to standard

Author: winner245

libcxx/test/std/containers/sequences/vector.bool/shrink_to_fit.pass.cpp

@@ -55,7 +55,7 @@ struct increasing_allocator {
     min_elements += 1000;
     return std::allocator<T>{}.allocate_at_least(n);
   }
-  constexpr T* allocate(std::size_t n) { return allocate_at_least(n).ptr; }
+  constexpr T* allocate(std::size_t n) { return std::allocator<T>{}.allocate(n); }
   constexpr void deallocate(T* p, std::size_t n) noexcept { std::allocator<T>{}.deallocate(p, n); }
 };
 

libcxx/test/std/containers/sequences/vector/vector.capacity/shrink_to_fit.pass.cpp

@@ -87,7 +87,7 @@ struct increasing_allocator {
     min_elements += 1000;
     return std::allocator<T>{}.allocate_at_least(n);
   }
-  constexpr T* allocate(std::size_t n) { return allocate_at_least(n).ptr; }
+  constexpr T* allocate(std::size_t n) { return std::allocator<T>{}.allocate(n); }
   constexpr void deallocate(T* p, std::size_t n) noexcept { std::allocator<T>{}.deallocate(p, n); }
 };
 

libcxx/test/std/strings/basic.string/string.capacity/shrink_to_fit.pass.cpp

@@ -79,8 +79,8 @@ struct increasing_allocator {
     min_bytes += 1000;
     return {static_cast<T*>(::operator new(allocation_amount)), allocation_amount / sizeof(T)};
   }
-  T* allocate(std::size_t n) { return allocate_at_least(n).ptr; }
-  void deallocate(T* p, std::size_t) noexcept { ::operator delete(static_cast<void*>(p)); }
+  T* allocate(std::size_t n) { return std::allocator<T>{}.allocate(n); }
+  void deallocate(T* p, std::size_t n) noexcept { std::allocator<T>{}.deallocate(p, n); }
 };
 
 template <typename T, typename U>