Trait FeatureFlags

Source

pub trait FeatureFlags {
    // Required methods
    fn is_enabled(&self, name: &str) -> Option<bool>;
    fn set(&mut self, name: &str, enabled: bool) -> bool;
    fn all_flags() -> &'static [&'static str]
       where Self: Sized;

    // Provided methods
    fn enable(&mut self, name: &str) -> bool { ... }
    fn disable(&mut self, name: &str) -> bool { ... }
    fn toggle(&mut self, name: &str) -> Option<bool> { ... }
    fn to_map(&self) -> HashMap<String, bool>
       where Self: Sized { ... }
    fn load_from_map(&mut self, map: &HashMap<String, bool>) -> usize { ... }
}

Expand description

Trait for feature flag containers

Implement this trait to create a type-safe feature flag system. Use #[derive(FeatureFlags)] for automatic implementation.

§Example

use tui_dispatch_core::FeatureFlags;

struct MyFeatures {
    dark_mode: bool,
    experimental: bool,
}

impl FeatureFlags for MyFeatures {
    fn is_enabled(&self, name: &str) -> Option<bool> {
        match name {
            "dark_mode" => Some(self.dark_mode),
            "experimental" => Some(self.experimental),
            _ => None,
        }
    }

    fn set(&mut self, name: &str, enabled: bool) -> bool {
        match name {
            "dark_mode" => { self.dark_mode = enabled; true }
            "experimental" => { self.experimental = enabled; true }
            _ => false,
        }
    }

    fn all_flags() -> &'static [&'static str] {
        &["dark_mode", "experimental"]
    }
}