Fix C++/CLI build problem (#916)

Author: Chronial

absl/container/internal/layout.h

@@ -404,7 +404,7 @@ class LayoutImpl<std::tuple<Elements...>, absl::index_sequence<SizeSeq...>,
   constexpr size_t Offset() const {
     static_assert(N < NumOffsets, "Index out of bounds");
     return adl_barrier::Align(
-        Offset<N - 1>() + SizeOf<ElementType<N - 1>>() * size_[N - 1],
+        Offset<N - 1>() + SizeOf<ElementType<N - 1>>::value * size_[N - 1],
         ElementAlignment<N>::value);
   }
 
@@ -597,7 +597,7 @@ class LayoutImpl<std::tuple<Elements...>, absl::index_sequence<SizeSeq...>,
   constexpr size_t AllocSize() const {
     static_assert(NumTypes == NumSizes, "You must specify sizes of all fields");
     return Offset<NumTypes - 1>() +
-           SizeOf<ElementType<NumTypes - 1>>() * size_[NumTypes - 1];
+           SizeOf<ElementType<NumTypes - 1>>::value * size_[NumTypes - 1];
   }
 
   // If built with --config=asan, poisons padding bytes (if any) in the
@@ -621,7 +621,7 @@ class LayoutImpl<std::tuple<Elements...>, absl::index_sequence<SizeSeq...>,
     // The `if` is an optimization. It doesn't affect the observable behaviour.
     if (ElementAlignment<N - 1>::value % ElementAlignment<N>::value) {
       size_t start =
-          Offset<N - 1>() + SizeOf<ElementType<N - 1>>() * size_[N - 1];
+          Offset<N - 1>() + SizeOf<ElementType<N - 1>>::value * size_[N - 1];
       ASAN_POISON_MEMORY_REGION(p + start, Offset<N>() - start);
     }
 #endif
@@ -645,7 +645,7 @@ class LayoutImpl<std::tuple<Elements...>, absl::index_sequence<SizeSeq...>,
   // produce "unsigned*" where another produces "unsigned int *".
   std::string DebugString() const {
     const auto offsets = Offsets();
-    const size_t sizes[] = {SizeOf<ElementType<OffsetSeq>>()...};
+    const size_t sizes[] = {SizeOf<ElementType<OffsetSeq>>::value...};
     const std::string types[] = {
         adl_barrier::TypeName<ElementType<OffsetSeq>>()...};
     std::string res = absl::StrCat("@0", types[0], "(", sizes[0], ")");