Struct Evaluator 

pub struct Evaluator { /* private fields */ }

Implementations

impl Evaluator

pub fn new( context: HashMap<String, Value>, custom_functions: HashMap<String, Arc<dyn CustomFunction>>, ) -> Self

Examples found in repository

examples/basic.rs (lines 15-20)

fn main() -> Result<(), Box<dyn Error>> {
    #[cfg(feature = "logging")]
    let logger = scribe_rust::Logger::default();

    let mut ctx = HashMap::new();
    ctx.insert("x".to_string(), serde_json::Value::Number(5.into()));
    let engine = exprimo::Evaluator::new(
        ctx,
        HashMap::new(), // custom_functions
        #[cfg(feature = "logging")]
        logger,
    );

    let result = engine.evaluate("x == 5")?;

    println!("x = {}", result);

    Ok(())
}

examples/payload.rs (lines 94-99)

fn main() -> Result<(), Box<dyn Error>> {
    #[cfg(feature = "logging")]
    let logger = scribe_rust::Logger::default();

    let mut ctx = HashMap::new();

    add_context("send_email", r#"{"status": "success"}"#, &mut ctx);
    let engine = exprimo::Evaluator::new(
        to_json(&ctx),
        HashMap::new(), // custom_functions
        #[cfg(feature = "logging")]
        logger,
    );

    let expr = r#"send_email.status === 'success' "#;

    let result = engine.evaluate(expr)?;

    println!("send_email.status === 'success' => {}", result);

    Ok(())
}

pub fn evaluate(&self, expression: &str) -> Result<Value, EvaluationError>

Examples found in repository

examples/basic.rs (line 22)

fn main() -> Result<(), Box<dyn Error>> {
    #[cfg(feature = "logging")]
    let logger = scribe_rust::Logger::default();

    let mut ctx = HashMap::new();
    ctx.insert("x".to_string(), serde_json::Value::Number(5.into()));
    let engine = exprimo::Evaluator::new(
        ctx,
        HashMap::new(), // custom_functions
        #[cfg(feature = "logging")]
        logger,
    );

    let result = engine.evaluate("x == 5")?;

    println!("x = {}", result);

    Ok(())
}

examples/payload.rs (line 103)

fn main() -> Result<(), Box<dyn Error>> {
    #[cfg(feature = "logging")]
    let logger = scribe_rust::Logger::default();

    let mut ctx = HashMap::new();

    add_context("send_email", r#"{"status": "success"}"#, &mut ctx);
    let engine = exprimo::Evaluator::new(
        to_json(&ctx),
        HashMap::new(), // custom_functions
        #[cfg(feature = "logging")]
        logger,
    );

    let expr = r#"send_email.status === 'success' "#;

    let result = engine.evaluate(expr)?;

    println!("send_email.status === 'success' => {}", result);

    Ok(())
}