Power Fx interpreter for Rust

This crate provides an embedded Power Fx interpreter for Rust projects.

Getting started

Install the package.

cargo add powerfx

Status

This library is still an an alpha status. The following functions have been implemented:

• Table
• First
• Last
• Index
• Filter
• Set
• If
• And
• Or
• Not
• Abs
• Sqrt
• Left
• Mid
• Right
• Upper
• Lower
• Average
• Sum
• Min
• Max

Examples

The following example illustrates adding two constant numbers.

use powerfx::{DataValue, PowerFxEngine};

fn main() {
    let engine = PowerFxEngine::new();
    let result = engine.evaluate("2 + 3", None).unwrap();
    assert_eq!(result, DataValue::Number(5.0));
}

This can also be done with variables.

let engine = PowerFxEngine::new();
let mut session = Session::new();
session.set_variable("a", DataValue::Number(2.0));
session.set_variable("b", DataValue::Number(3.0));

let result = engine.evaluate("a + b", Some(&mut session)).unwrap();
assert_eq!(result, DataValue::Number(5.0));

For more examples, please see the Examples Folder