Crate partial_cmp_derive 

partial-cmp-derive

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

Features

• Skip fields: Use #[ord(skip)] to exclude fields from comparison
• Sort order: Use #[ord(order = "asc")] or #[ord(order = "desc")] per field
• Explicit ordering: Use #[ord(by = [field1(desc), field2(asc)])] at struct level
• Field priority: Use #[ord(priority = N)] for implicit ordering (lower = first)
• Custom comparators: Use #[ord(compare_with = "path::to::fn")]
• Reverse all: Use #[ord(reverse)] at struct level to reverse entire comparison
• Enum ranking: Use #[ord(rank = N)] to control variant ordering
• Option handling: Use #[ord(none_order = "first")] or "last"

Example

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,
}

This generates PartialOrd and Ord implementations that compare name ascending, then score descending, while ignoring id entirely.

Derive Macros

PartialCmpDerive

Derives PartialOrd and Ord with customizable field comparison behavior.