[libc++][test] size_type issues with MinSequenceContainer and...

... `min_allocator`

Author: frederick-vs-ja

libcxx/test/support/MinSequenceContainer.h

@@ -31,7 +31,7 @@ struct MinSequenceContainer {
   const_iterator cbegin() const { return const_iterator(data_.data()); }
   iterator end() { return begin() + size(); }
   const_iterator end() const { return begin() + size(); }
-  size_type size() const { return data_.size(); }
+  size_type size() const { return static_cast<size_type>(data_.size()); }
   bool empty() const { return data_.empty(); }
 
   void clear() { data_.clear(); }

libcxx/test/support/min_allocator.h

@@ -394,12 +394,12 @@ class min_allocator
     template <class U>
     TEST_CONSTEXPR_CXX20 min_allocator(min_allocator<U>) {}
 
-    TEST_CONSTEXPR_CXX20 pointer allocate(std::ptrdiff_t n)
+    TEST_CONSTEXPR_CXX20 pointer allocate(std::size_t n)
     {
         return pointer(std::allocator<T>().allocate(n));
     }
 
-    TEST_CONSTEXPR_CXX20 void deallocate(pointer p, std::ptrdiff_t n)
+    TEST_CONSTEXPR_CXX20 void deallocate(pointer p, std::size_t n)
     {
         std::allocator<T>().deallocate(p.ptr_, n);
     }