NSDecimal error

[liamappelbe]

NSDecimal is a bitfield struct, which is not supported, so it is treated as an incomplete struct. However, this check happens after methods/functions are parsed, so the usual check that ignores functions that take/return incomplete structs doesn't work.

The best fix would probably just be to move the bitfield check earlier in the parsing.

[liamappelbe]

However, this check happens after methods/functions are parsed

This is wrong. The issue is that NSDecimal is being used as a property. I didn't implement the incomplete struct check for properties, because you can't use an incomplete struct as a property (since the property becomes field on the class). But you can use bit fields as properties. So I just need to implement this check for properties.

[dcharkes]

For bitfields by value we might need Dart VM support, because currently we need to emit chars/uint16/uint32/uint64 structs to ensure alignment is correct.

• dart:ffi Struct bit fields sdk#38954 (comment)
• Support for bitfields in structs #406

I've filed

• [ObjectiveC] Support bitfields by value #250

to track that.