Trait Valueable

Source

pub trait Valueable:
    Debug
    + Display
    + Clone
    + Eq
    + PartialEq
    + PartialOrd
    + Hash
    + Add
    + Sub
    + Mul
    + Div
    + Rem
    + Pow<Self> {
    // Required methods
    fn is_truthy(&self) -> ValueResult<bool, Self>;
    fn to_int(&self) -> ValueResult<i32, Self>;
    fn to_float(&self) -> ValueResult<f32, Self>;
    fn display_numerical(&self) -> ValueResult<String, Self>;
}

Expand description

A trait to allow “extension” of the Value enum.

Sometimes, the basic types supported by Value are not enough and the newtype pattern is required to extend it. Registering this newtype as Valueable means that it supports all common operations associated with a Value.

Besides implementing the required methods. Any type that implements Valueable is required to implement the following traits:

std::fmt::Debug
std::fmt::Display
Clone
Eq
PartialEq
PartialOrd
std::hash::Hash
std::ops::Add
std::ops::Sub
std::ops::Mul
std::ops::Div
std::ops::Rem
num_traits::Pow<Self> This is required such that we can expect any Valueable type to work more or less the same.

Most of the required traits can be automatically derived. You can use wagon_macros::ValueOps (or it’s associated methods) to automatically derive implementations for all the operative traits (Add, Sub, etc).