scala-interop/slinc

<stdbool.h> type conversion

donderom opened this issue · 4 comments

donderom commented

Is there any way to add type conversions between builtin and custom data types?
For example I'm using byte for mapping bool but it would be nice to specify a conversion to/from boolean (by type class?) in the mapping.

markehammons commented

Sorry, it's not currently possible to do this. In order to do this I need to allow for transform types (types that have one backing in C, but another in Scala). It'd be something similar to alias types that exist currently.

donderom commented

It would be nice to be able to define a TypeDescriptor for some custom type but at the same it's been only boolean I've faced issues with so far.

markehammons commented

This can now be done by defining a Transform:

given Transform[Boolean, Int](
  i => if i != 0 then true else false,
  b => if b then 1 else 0
)

I've also added types CBool and CBoolShort, for char width and short width primitives that should be read as booleans.

donderom commented

All my tests for bools pass, thanks a lot! 👍🏼