yunjhongwu / strong-type Goto Github PK

Hi Yun-Jhong Wu,

Thanks for the crate StrongType, This is a great one.
Sorry if the issue I have is not very well explained, I am a newbie to rust.

I have external file, say timestamp.rs, where I define a strong type:
#[derive(StrongType)]
#[strong_type(auto_operators)]
pub struct Timestamp(usize);

When using in the main.rs an expression such as:

Timestamp(123456789) + Timestamp(987654321)

I get an error in the main.rs:

• cannot initialize a tuple struct which contains private fields [...]
• timestamp.rs(8, 20): constructor is not visible here due to private fields
• timestamp.rs(8, 20): consider making the field publicly accessible: pub

If in timestamp.rs I do add pub in the declaration,

#[derive(StrongType)]
#[strong_type(auto_operators)]
pub struct NbTeams(pub usize);

I get another error, in the timestamp.rs:

• proc-macro derive panicked
• message: Strong type must be a tuple struct with one private field.

There might be some proper way of doing it, but I am not yet good enough at rust to get it.

Thanks.