Minor improvement (#7766)

include/flatbuffers/detached_buffer.h

@@ -45,7 +45,7 @@ class DetachedBuffer {
         cur_(cur),
         size_(sz) {}
 
-  DetachedBuffer(DetachedBuffer &&other)
+  DetachedBuffer(DetachedBuffer &&other) noexcept
       : allocator_(other.allocator_),
         own_allocator_(other.own_allocator_),
         buf_(other.buf_),
@@ -55,7 +55,7 @@ class DetachedBuffer {
     other.reset();
   }
 
-  DetachedBuffer &operator=(DetachedBuffer &&other) {
+  DetachedBuffer &operator=(DetachedBuffer &&other) noexcept {
     if (this == &other) return *this;
 
     destroy();

include/flatbuffers/flatbuffer_builder.h

@@ -98,7 +98,7 @@ class FlatBufferBuilder {
   }
 
   /// @brief Move constructor for FlatBufferBuilder.
-  FlatBufferBuilder(FlatBufferBuilder &&other)
+  FlatBufferBuilder(FlatBufferBuilder &&other) noexcept
       : buf_(1024, nullptr, false, AlignOf<largest_scalar_t>()),
         num_field_loc(0),
         max_voffset_(0),
@@ -116,7 +116,7 @@ class FlatBufferBuilder {
   }
 
   /// @brief Move assignment operator for FlatBufferBuilder.
-  FlatBufferBuilder &operator=(FlatBufferBuilder &&other) {
+  FlatBufferBuilder &operator=(FlatBufferBuilder &&other) noexcept {
     // Move construct a temporary and swap idiom
     FlatBufferBuilder temp(std::move(other));
     Swap(temp);

include/flatbuffers/flexbuffers.h

@@ -1845,7 +1845,7 @@ class Verifier FLATBUFFERS_FINAL_CLASS {
         uint8_t len = 0;
         auto vtype = ToFixedTypedVectorElementType(r.type_, &len);
         if (!VerifyType(vtype)) return false;
-        return VerifyFromPointer(p, r.byte_width_ * len);
+        return VerifyFromPointer(p, static_cast<size_t>(r.byte_width_) * len);
       }
       default: return false;
     }

include/flatbuffers/vector_downward.h

@@ -45,7 +45,7 @@ class vector_downward {
         cur_(nullptr),
         scratch_(nullptr) {}
 
-  vector_downward(vector_downward &&other)
+  vector_downward(vector_downward &&other) noexcept
       // clang-format on
       : allocator_(other.allocator_),
         own_allocator_(other.own_allocator_),
@@ -66,7 +66,7 @@ class vector_downward {
     other.scratch_ = nullptr;
   }
 
-  vector_downward &operator=(vector_downward &&other) {
+  vector_downward &operator=(vector_downward &&other) noexcept {
     // Move construct a temporary and swap idiom
     vector_downward temp(std::move(other));
     swap(temp);