A hal library has a tuple struct as below for gpio pin.
pub struct Pin(u8);
I am trying to use this value as shift count. How to convert to u8? casting as below, threw an compilation error, coz tuple can't be casted to u8.
let p = pin as u8;
as expression can only be used to convert between primitive types or to coerce to a specific trait object
The u8 field is private; you can only access it if the crate provides a function or method to access it.
OTOH, if it is a public field, you can use numbered field access or pattern matching to extract it:
let p = pin.0;
let Pin(p) = pin;
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