A JEXL evaluator written in Rust This crate depends on a JEXL parser crate that handles all the parsing and is a part of the same workspace. JEXL is an expression language used by Mozilla, you can find more information here: https://github.com/mozilla/mozjexl

How to use

The access point for this crate is the eval functions You can use the eval function directly to evaluate standalone statements

For example:

use jexl_eval::eval;
assert_eq!(eval("'Hello ' + 'World'").unwrap(), "Hello World");

You can also run the statements against a context using the eval_in_context function The context can be any type that implements the serde::Serializable trait and the function will return errors if the statement doesn't match the context

For example:

use jexl_eval::eval_in_context;
use serde_json::json as value;
let context = value!({"a": {"b": 2.0}});
assert_eq!(eval_in_context("a.b", context).unwrap(), value!(2.0));