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use crate::error::ValidationError; /// Macro to return a new `ValidationError` with an optional message #[macro_export] macro_rules! invalid { () => { $crate::ValidationError::from(None) }; ($($arg:tt)+) => { $crate::ValidationError::from(format!($($arg)+)) }; } /// Trait for data types which need validation after being loaded from external sources pub trait Validatable { fn validate(&self) -> Result<(), ValidationError> { Ok(()) } }