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world_shipping/
errors.rs

1use thiserror::Error;
2
3#[derive(Debug, Error)]
4pub enum InputValidationError {
5    #[error("Invalid country code: {0}")]
6    InvalidCountryCode(String),
7    #[error("Invalid region code: {0}")]
8    InvalidRegionCode(String),
9    #[error("Unexpected region code: {0} - Country has no regions.")]
10    UnexpectedRegionCode(String),
11}