invr 0.2.1

Declarative data validation engine using invariants executed on Polars DataFrames.
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use crate::scope::Scope;
use std::fmt;

impl fmt::Display for Scope {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Scope::Dataset => write!(f, "dataset"),
            Scope::Column { name } => write!(f, "column '{name}'"),
        }
    }
}