partial-cmp-derive

A procedural macro for deriving PartialOrd and Ord with fine-grained control over field comparison.

Installation

[dependencies]
partial-cmp-derive = "0.1"

Usage

use partial_cmp_derive::PartialCmpDerive;

#[derive(PartialEq, Eq, PartialCmpDerive)]
struct Player {
    #[ord(skip)]
    id: u64,
    #[ord(order = "asc")]
    name: String,
    #[ord(order = "desc")]
    score: u32,
}

Attributes

Struct-Level

• #[ord(reverse)] — Reverse the final comparison result
• #[ord(by = [field1(asc), field2(desc)])] — Explicit field comparison order

Field-Level

• #[ord(skip)] — Exclude field from comparison
• #[ord(order = "asc"|"desc")] — Sort direction
• #[ord(priority = N)] — Comparison priority (lower = first)
• #[ord(compare_with = "path::to::fn")] — Custom comparator
• #[ord(none_order = "first"|"last")] — Option handling

Enum Variants

• #[ord(rank = N)] — Variant ranking (lower = less than)

License

MIT