expr.rs

A safe and simple math evaluator for Rust.

Features

Basic operations such as

• addition
• subtraction
• multiplication
• division
• modulo
• exponentiation
• negation
• factorial

are supported

Features like sin, cos, tan, log, and more are planned for the future.

A python interface is also planned for the future.

Usage

use expr_rs::parser;

assert_eq!(parser::eval("1 + 2").unwrap().to_string(), "3");

In Python

import expr_rs

assert expr_rs.eval("1 + 2") == 3

In CLI

cargo install expr_rs

expr 1 + 2

lib.rs:

Expr.rs - A safe and simple math evaluator for Rust and Python.