Crate frunk_proc_macros

Module that holds procedural macros for Frunk

Examples

#[macro_use] extern crate frunk;
#[macro_use] extern crate frunk_core;
#[derive(LabelledGeneric)]
struct Dog<'a> {
    name: &'a str,
    dimensions: Dimensions,
}

#[derive(LabelledGeneric)]
struct Cat<'a> {
    name: &'a str,
    dimensions: Dimensions,
}

#[derive(LabelledGeneric)]
struct Dimensions {
    height: usize,
    width: usize,
    unit: SizeUnit,
}

#[derive(Debug, Eq, PartialEq)]
enum SizeUnit {
    Cm,
    Inch,
}

let mut dog = Dog {
    name: "Joe",
    dimensions: Dimensions {
        height: 10,
        width: 5,
        unit: SizeUnit::Inch,
    },
};

let cat = Cat {
    name: "Schmoe",
    dimensions: Dimensions {
        height: 7,
        width: 3,
        unit: SizeUnit::Cm,
    },
};

// generic, re-usable paths
let height_lens = path!(dimensions.height);
let unit_lens = path!(dimensions.unit);

assert_eq!(*height_lens.get(&dog), 10);
assert_eq!(*height_lens.get(&cat), 7);
assert_eq!(*unit_lens.get(&dog), SizeUnit::Inch);
assert_eq!(*unit_lens.get(&cat), SizeUnit::Cm);

// modify
*height_lens.get(&mut dog) = 13;
assert_eq!(*height_lens.get(&dog), 13);

Macros

path	Add one to an expression.