Module evaluator 

Available on crate feature expression only.

Core CEL expression operations – compile, evaluate, validate.

Wraps the cel crate (renamed from cel-interpreter), enforcing the DFE expression profile on every compilation path. Both Python (via common-expression-language PyO3 bindings) and Rust share the same Rust crate – zero behavioural drift between services.

Profile Configuration

When the config feature is enabled alongside expression, the profile is loaded automatically from the config cascade under the expression key. Applications can set overrides in their settings.yaml:

expression:
  allow_regex: true
  allow_iteration: false
  allow_time: false

Without the config feature (or before config::setup() is called), ProfileConfig::default() is used – all restrictions active.

Usage

use hyperi_rustlib::expression::{compile, evaluate, evaluate_condition, validate};
use std::collections::HashMap;
use serde_json::json;

// Validate before storing (UI pre-submit)
assert!(validate(r#"severity == "critical""#).is_empty());

// One-shot evaluation
let mut data = HashMap::new();
data.insert("severity".into(), json!("critical"));
let result = evaluate(r#"severity == "critical""#, &data).unwrap();
assert_eq!(result, true.into());

// Boolean condition (missing fields → false)
let empty = HashMap::new();
assert!(!evaluate_condition(r#"severity == "critical""#, &empty));

// Compile once, evaluate many (hot path)
let program = compile("amount > threshold").unwrap();
// ... call program.execute(&context) per record

Functions

build_context

Build a CEL Context from any iterable of (key, value) pairs.

compile

Compile a CEL expression, enforcing the DFE profile.

compile_with_config

Compile a CEL expression with an explicit profile config.

evaluate

Compile and evaluate a CEL expression in one step.

evaluate_condition

Evaluate a boolean condition, returning false on missing fields.

validate

Validate an expression for syntax and DFE profile compliance.

validate_with_config

Validate an expression with an explicit profile config.