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Description
For enums representing errors, often the Ok variant is the 0 value of the enum. It would be convenient if bindgen could replace this enum with a Result on the Rust side.
Example C-enum:
enum MY_C_ERRORCODE {
MY_C_ERRORCODE_SUCCESS,
MY_C_ERRORCODE_ERROR1,
MY_C_ERRORCODE_ERROR2,
}Expected Rust binding:
#[repr(transparent)]
pub struct MY_C_ERRORCODE_NZ(NonZero<c_int>);
impl MY_C_ERRORCODE {
pub const ERROR1 = MY_C_ERRORCODE_NZ(NonZero::new(1).unwrap()));
pub const ERROR2 = MY_C_ERRORCODE_NZ(NonZero::new(2).unwrap()))
}
// Perhaps this typedef could be omitted, and usages in the API could just use the result directly
type MY_C_ERRORCODE = Result<(), MY_C_ERRORCODE_NZ>;This should work well at least when assuming that the generated non-zero enum representation is Newtype based.
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