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feat(argus-semantics): implement efficient streaming MinMax

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Anand Balakrishnan 2023-08-28 13:02:51 -07:00
parent 4084bb738b
commit 86cef692dc
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8 changed files with 353 additions and 162 deletions
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69
argus-semantics/src/lib.rs
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@ -3,71 +3,10 @@
//! In this crate, we are predominantly concerned with the monitoring of _offline system
//! traces_, i.e., a collection of signals that have been extracted from observing and
//! sampling from some system.
use argus_core::expr::BoolExpr;
use argus_core::signals::Signal;
use argus_core::ArgusResult;
pub mod eval;
pub mod semantics;
// pub mod eval;
// pub mod semantics;
// pub mod traits;
pub mod utils;
pub use semantics::boolean::BooleanSemantics;
pub use semantics::quantitative::QuantitativeSemantics;
/// A trace is a collection of signals
///
/// # Example
///
/// An example of a `Trace` may be:
///
/// ```rust
/// use argus_core::signals::{Signal, AnySignal};
/// use argus_semantics::Trace;
///
/// struct MyTrace {
/// x: Signal<bool>,
/// y: Signal<i64>,
/// }
///
/// impl Trace for MyTrace {
/// fn signal_names(&self) -> Vec<&str> {
/// vec!["x", "y"]
/// }
///
/// fn get<T: 'static>(&self, name: &str) -> Option<&Signal<T>> {
/// let sig: &dyn AnySignal = match name {
/// "x" => &self.x,
/// "y" => &self.y,
/// _ => return None,
/// };
/// sig.as_any().downcast_ref::<Signal<T>>()
/// }
/// }
///
/// let trace = MyTrace {
/// x: Signal::constant(true),
/// y: Signal::constant(2),
/// };
/// let names = trace.signal_names();
///
/// assert!(names == &["x", "y"] || names == &["y", "x"]);
/// assert!(matches!(trace.get::<bool>("x"), Some(Signal::Constant { value: true })));
/// assert!(matches!(trace.get::<i64>("y"), Some(Signal::Constant { value: 2 })));
/// ```
pub trait Trace {
/// Get the list of signal names contained within the trace.
fn signal_names(&self) -> Vec<&str>;
/// Query a signal using its name
fn get<T: 'static>(&self, name: &str) -> Option<&Signal<T>>;
}
/// General interface for defining semantics for the [`argus-core`](argus_core) logic.
pub trait Semantics {
/// The output of applying the given semantics to an expression and trace.
type Output;
/// Any additional possible context that can be passed to the semantics evaluator.
type Context;
fn eval(expr: &BoolExpr, trace: &impl Trace, ctx: Self::Context) -> ArgusResult<Self::Output>;
}
// pub use traits::{BooleanSemantics, QuantitativeSemantics, Trace};