VariantEq

This crate provides a macro to implement equality of enum variants.

Two enum variants are equal if they are the same variant from the same enum, regardless of the values of the fields each variant contains.

#[derive(VariantEq)]
enum Enum {
    Variant,
}

Examples

#[macro_use]
extern crate varianteq;

#[derive(Debug, VariantEq)]
enum E {
    A(i32),
    B(i32),
    C(u32, bool),
}

fn main() {
    assert_eq!(E::A(1), E::A(2));
    assert_ne!(E::A(1), E::B(1));
    assert_ne!(E::A(1), E::C(1, false));
}

Errors

The VariantEq macro only applies to enums and will cauase a compilation error if used on structs.

#[derive(VariantEq)]
struct S;

error: #[derive(VariantEq)] is only defined for enums