cargo-dry4rust 0.4.0

A cargo subcommand that detects duplicate and near-duplicate code blocks in Rust codebases using AST normalization
Documentation 
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// Copyright (c) 2026 Matjaz Domen Pecan
// Copyright 2026 Umberto Gotti <umberto.gotti@umbertogotti.dev>
// Licensed under the MIT License
// SPDX-License-Identifier: MIT

/// Two candidate units found similar enough to be worth grouping, and how
/// similar they were.
///
/// The indices address the candidate list the pair was drawn from; the pair
/// carries no meaning without it.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct SimilarityPair {
    pub left: usize,
    pub right: usize,
    pub score: f64,
}

impl SimilarityPair {
    #[must_use]
    pub const fn new(left: usize, right: usize, score: f64) -> Self {
        Self { left, right, score }
    }

    /// The pair's indices in ascending order.
    ///
    /// Similarity is symmetric, so a lookup keyed on the raw pair would miss
    /// half the time. Ordering the key removes the question.
    #[must_use]
    pub const fn key(&self) -> (usize, usize) {
        if self.left < self.right {
            (self.left, self.right)
        } else {
            (self.right, self.left)
        }
    }
}