pub struct WatchBuilder { /* private fields */ }Expand description
Builder for a state watcher.
Created by Live::watch and returned to the Live chain via then.
Implementations§
Source§impl WatchBuilder
impl WatchBuilder
Sourcepub fn changed_to(self, value: Value) -> Self
pub fn changed_to(self, value: Value) -> Self
Fire when the new value equals the given value.
Sourcepub fn crossed_above(self, threshold: f64) -> Self
pub fn crossed_above(self, threshold: f64) -> Self
Fire when the value crosses above the given threshold.
Sourcepub fn crossed_below(self, threshold: f64) -> Self
pub fn crossed_below(self, threshold: f64) -> Self
Fire when the value crosses below the given threshold.
Sourcepub fn became_true(self) -> Self
pub fn became_true(self) -> Self
Fire when the value changes from non-true to true.
Sourcepub fn became_false(self) -> Self
pub fn became_false(self) -> Self
Fire when the value changes from true to non-true.
Sourcepub fn blocking(self) -> Self
pub fn blocking(self) -> Self
Make this watcher blocking (awaited sequentially on the control lane).
Sourcepub fn then<F, Fut>(self, f: F) -> Live
pub fn then<F, Fut>(self, f: F) -> Live
Set the action and finish building the watcher, returning the Live builder.
The action receives (old_value, new_value, state).
Sourcepub fn then_with_writer<F, Fut>(self, f: F) -> Live
pub fn then_with_writer<F, Fut>(self, f: F) -> Live
Like then, but the action also receives the live
session writer — so a watcher can inject steering context or prompt
the model, not only mutate state.
The action receives (old_value, new_value, state, writer).
Auto Trait Implementations§
impl !Freeze for WatchBuilder
impl !RefUnwindSafe for WatchBuilder
impl Send for WatchBuilder
impl !Sync for WatchBuilder
impl Unpin for WatchBuilder
impl !UnwindSafe for WatchBuilder
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