Primitive Wrapper

Primitive Wrapper is a small derive macro for generating operation trait implementations for primitive wrapper structs, making the inner value transparent:

#[derive(Primitive)]
struct Int(u64);

fn main() {
    let input = Int(0xFF0000);
    let mask = Int(0xFF);
    let result = input >> 16 & mask;
    assert_eq!(result, 0xFF);
}

The implemented traits are:

• Arithmetic: Add, Sub, Mul, Div, Rem, Neg
• Bitwise: Not, BitAnd, BitOr, BitXor, Shl, Shr
• Passthrough Formatting: Debug, Display, Binary, LowerExp, LowerHex, Octal, UpperExp, UpperHex
• Comparison: PartialEq/PartialOrd with the inner type
• Accumulation: Sum and Product

By default, all of the above traits are implemented. These groups can also be selected individually:

#[derive(Primitive)]
#[primwrap(arithmetic, bitwise, formatting, comparison, accumulation)]
struct Int(u64);

Prior Art

This crate provides similar functionality to the newtype_derive crate, but the derived traits are specified individually. It is more generalized for all new-type patterns, whereas this crate is designed only for new-types wrapping integers, floats, and bool. Use newtype_derive if you need more fine-grained control over the traits implemented.