configbuilder_pattern_loader/
feature_state_ops.rs

1use crate::FeatureState;
2
3/// Operations on [`FeatureState<T>`] — presence-driven feature gate.
4pub trait FeatureStateOps: Sized {
5    /// The inner value type when the state is enabled.
6    type Value;
7
8    /// Return `true` when the state holds an enabled value.
9    fn is_enabled(&self) -> bool;
10
11    /// Return `true` when the state is disabled.
12    fn is_disabled(&self) -> bool;
13
14    /// Convert into an `Option<Self::Value>`, discarding disabled states.
15    fn into_option(self) -> Option<Self::Value>;
16
17    /// Borrow the inner value when enabled.
18    fn as_option(&self) -> Option<&Self::Value>;
19
20    /// Map the inner value when enabled.
21    fn map<U>(self, f: impl FnOnce(Self::Value) -> U) -> FeatureState<U>;
22
23    /// Chain another state-producing operation when enabled.
24    fn and_then<U>(self, f: impl FnOnce(Self::Value) -> FeatureState<U>) -> FeatureState<U>;
25
26    /// Return the inner value or the provided default when disabled.
27    fn unwrap_or(self, default: Self::Value) -> Self::Value;
28
29    /// Return the inner value or compute one lazily when disabled.
30    fn unwrap_or_else(self, f: impl FnOnce() -> Self::Value) -> Self::Value;
31
32    /// Return the enabled value or `Self::Value::default()` when disabled.
33    fn enabled_or_default(self) -> Self::Value
34    where
35        Self::Value: Default;
36}
configbuilder_pattern_loader/feature_state_ops.rs

configbuilder_pattern_loader/
feature_state_ops.rs
