non_blank_string_rs/
error.rs

1use std::fmt::{Display, Formatter};
2
3#[derive(Debug)]
4pub enum StringValueError {
5    ParseError
6}
7
8impl Display for StringValueError {
9    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
10        write!(f, "String cannot be blank")
11    }
12}
13
14impl std::error::Error for StringValueError {}