Loose Enum

A macro for defining loose repr enums.

When parsing userdata, you often have known/supported cases; however, users don't always follow the rules. One way to solve this is having a backup Undefined case that supports any value. This crate hopes to simplify this process.

Example:

For example, an integer repr bool, with 0 being false and 1 being true would look something like this:

loose_enum::loose_enum! {
    #[derive(Default, Debug, Clone, Copy, Eq, PartialEq, Hash)]
    pub enum LooseBool: i32 {
        #[default]
        False = 0,
        True = 1,
    }
}

Which expands into the following:

#[derive(Default, Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum LooseBool {
    #[default]
    False,
    True,
    /// Any value that doesn't match another case. 
    Undefined(i32),
}

impl From<i32> for LooseBool { /* ... */ }
impl From<LooseBool> for i32 { /* ... */ }

// If feature flag `serde` is enabled:
impl Serialize for LooseBool { /* ... */ }
impl Deserialize for LooseBool { /* ... */ }