Struct Interpreter

Source

pub struct Interpreter { /* private fields */ }

Implementations§

Source §

impl Interpreter

Source

pub fn new() -> Self

Examples found in repository ?

examples/example.rs (line 6)

5fn main() {
6    let mut interp = Interpreter::new();
7    interp.eval("x = 10").unwrap();
8    interp.eval("y = 20").unwrap();
9    let val = interp
10        .eval("[max(x + y * 2, x * 2 - y), abs(x - y), x**2]")
11        .unwrap();
12    println!("{}", val); // 50
13
14    let context = HashMap::from([("x".to_string(), Value::Number(10.0))]);
15    let val = interp.eval_with_context("x + 1", &context).unwrap();
16    println!("{}", val); // 11
17
18    let val = interp.eval_boolean("x + 1").unwrap();
19    println!("{}", val); // true
20}

Source

pub fn eval(&mut self, code: &str) -> Result<Value, EvalError>

Examples found in repository ?

examples/example.rs (line 7)

5fn main() {
6    let mut interp = Interpreter::new();
7    interp.eval("x = 10").unwrap();
8    interp.eval("y = 20").unwrap();
9    let val = interp
10        .eval("[max(x + y * 2, x * 2 - y), abs(x - y), x**2]")
11        .unwrap();
12    println!("{}", val); // 50
13
14    let context = HashMap::from([("x".to_string(), Value::Number(10.0))]);
15    let val = interp.eval_with_context("x + 1", &context).unwrap();
16    println!("{}", val); // 11
17
18    let val = interp.eval_boolean("x + 1").unwrap();
19    println!("{}", val); // true
20}

Source

pub fn eval_with_context( &self, code: &str, context: &HashMap<String, Value>, ) -> Result<Value, EvalError>

Examples found in repository ?

examples/example.rs (line 15)

5fn main() {
6    let mut interp = Interpreter::new();
7    interp.eval("x = 10").unwrap();
8    interp.eval("y = 20").unwrap();
9    let val = interp
10        .eval("[max(x + y * 2, x * 2 - y), abs(x - y), x**2]")
11        .unwrap();
12    println!("{}", val); // 50
13
14    let context = HashMap::from([("x".to_string(), Value::Number(10.0))]);
15    let val = interp.eval_with_context("x + 1", &context).unwrap();
16    println!("{}", val); // 11
17
18    let val = interp.eval_boolean("x + 1").unwrap();
19    println!("{}", val); // true
20}

Source

pub fn eval_boolean(&self, code: &str) -> Result<bool, EvalError>

Examples found in repository ?

examples/example.rs (line 18)

5fn main() {
6    let mut interp = Interpreter::new();
7    interp.eval("x = 10").unwrap();
8    interp.eval("y = 20").unwrap();
9    let val = interp
10        .eval("[max(x + y * 2, x * 2 - y), abs(x - y), x**2]")
11        .unwrap();
12    println!("{}", val); // 50
13
14    let context = HashMap::from([("x".to_string(), Value::Number(10.0))]);
15    let val = interp.eval_with_context("x + 1", &context).unwrap();
16    println!("{}", val); // 11
17
18    let val = interp.eval_boolean("x + 1").unwrap();
19    println!("{}", val); // true
20}