simple_calculator/
simple_calculator.rs

1//! Simple calculator using uni-core as a library
2//!
3//! This example shows how to embed the Uni interpreter in your own application
4//! to evaluate mathematical expressions.
5
6use uni_core::{Interpreter, execute_string};
7
8fn main() {
9    // Create a new interpreter instance
10    let mut interp = Interpreter::new();
11
12    // Define some calculations to perform
13    let expressions = vec![
14        ("5 3 +", "Addition"),
15        ("10 4 -", "Subtraction"),
16        ("7 6 *", "Multiplication"),
17        ("20 4 /", "Division"),
18        ("3 dup *", "3 squared (3 * 3)"),
19        ("[1 2 3 4 5] length", "List length"),
20    ];
21
22    println!("Uni Calculator Example\n");
23
24    for (expr, description) in expressions {
25        // Execute the expression
26        match execute_string(expr, &mut interp) {
27            Ok(()) => {
28                // Get the result from the stack
29                if let Some(result) = interp.stack.last() {
30                    println!("{}: {} = {}", description, expr, result);
31                }
32            }
33            Err(e) => {
34                eprintln!("Error evaluating '{}': {:?}", expr, e);
35            }
36        }
37
38        // Clear the stack for next calculation
39        interp.stack.clear();
40    }
41
42    println!("\nDefining and using a custom function:");
43
44    // Define a square function and use it
45    match execute_string("'square [dup *] def  5 square", &mut interp) {
46        Ok(()) => {
47            if let Some(result) = interp.stack.last() {
48                println!("5 squared = {}", result);
49            }
50        }
51        Err(e) => {
52            eprintln!("Error: {:?}", e);
53        }
54    }
55}
simple_calculator/simple_calculator.rs

simple_calculator/
simple_calculator.rs
