You can’t create a subset of an enum directly, but splitting this up into multiple types works. You can have FunctionAError
with errors that function can produce and a variant for your common errors, and FunctionBError
which is similar:
#[derive(Debug, Error)]
enum MyErrorCommon {
#[error("bad value ({0})")]
MyErrorCommon(String),
}
#[derive(Debug, Error)]
enum FunctionAError {
#[error("error a")]
MyErrorA,
Common(#[from] MyErrorCommon),
}
// and same for FunctionBError
The try operator (?
) will automatically use From
impls to convert errors for you as well. If a function returns a result containing MyErrorCommon
in your function and you use ?
on it, it gets converted to that function’s error type for you. thiserror
generates the From
impl for you if you use #[from]
.
Well the neighbors now have two trees on their roof and we haven’t had power now in over a day, but otherwise fine. Workplace is open and has power and food so we’ve just been hanging out there.
Our home has no damage though.