Rust invoke trait method on generic type parameter

Question

Suppose I have a rust trait that contains a function that does not take a &self parameter. Is there a way for me to call this function based on a generic type parameter

Answer 1

As Aatch mentioned, this isn't currently possible. A workaround is to use a dummy parameter to specify the type of Self:

pub trait TypeTrait {
    fn type_id(_: Option) -> u16;
}

pub struct CustomType {
    // fields...
}

impl TypeTrait for CustomType {
    fn type_id(_: Option) -> u16 { 0 }
}

pub fn get_type_id() {
    let type_id = TypeTrait::type_id(None::);
}