cargo-semver-checks 0.50.0

Scan your Rust crate for semver violations.
Documentation
SemverQuery(
    id: "auto_trait_impl_added",
    human_readable_name: "public type gained auto trait",
    description: "A public type has gained an auto trait's implementation.",
    required_update: Minor,
    lint_level: Allow,
    reference_link: Some("https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits"),
    query: r#"
    {
        CrateDiff {
            current {
                item {
                    ... on ImplOwner {
                        visibility_limit @filter(op: "=", value: ["$public"]) @output

                        importable_path {
                            path @output @tag
                            public_api @filter(op: "=", value: ["$true"])
                        }

                        impl {
                            negative @filter(op: "!=", value: ["$true"])

                            implemented_trait {
                                trait {
                                    auto_trait: name @output

                                    canonical_path {
                                        auto_trait_path: path
                                            @filter(op: "one_of", value: ["$auto_traits"])
                                            @output
                                            @tag
                                    }
                                }
                            }
                        }
                        span_: span @optional {
                            filename @output
                            begin_line @output
                            end_line @output
                        }
                    }
                }
            }
            baseline {
                item {
                    ... on ImplOwner {
                        visibility_limit @filter(op: "=", value: ["$public"])
                        name @output

                        importable_path {
                            path @filter(op: "=", value: ["%path"])
                            public_api @filter(op: "=", value: ["$true"])
                        }

                        impl @fold @transform(op: "count") @filter(op: "=", value: ["$zero"]) {
                            negative @filter(op: "!=", value: ["$true"])

                            implemented_trait {
                                trait {
                                    canonical_path {
                                        path @filter(op: "=", value: ["%auto_trait_path"])
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }"#,
    arguments: {
        "public": "public",
        "zero": 0,
        "true": true,
        "auto_traits": [
            ["core", "marker", "Send"],
            ["core", "marker", "Sync"],
            ["core", "marker", "Unpin"],
            ["core", "panic", "unwind_safe", "RefUnwindSafe"],
            ["core", "panic", "unwind_safe", "UnwindSafe"],
        ],
    },
    error_message: "A public type has gained an auto trait implementation. Removing this auto trait in future would be a breaking change.",
    per_result_error_template: Some("type {{name}} has gained trait {{auto_trait}}, in {{span_filename}}:{{span_begin_line}}"),
    // TODO: see https://github.com/obi1kenobi/cargo-semver-checks/blob/main/CONTRIBUTING.md#adding-a-witness
    // for information about this field.
    witness: None,
)