Struct arithmetic_eval::fns::Map

pub struct Map;

Map function that evaluates the provided function on each item of the tuple.

Type

fn<T, U>([T], fn(T) -> U) -> [U]

Examples

let program = r#"
    xs = (1, -2, 3, -0.3);
    map(xs, |x| if(cmp(x, 0) == 1, x, 0)) == (1, 0, 3, 0)
"#;
let block = F32Grammar::parse_statements(Span::new(program)).unwrap();

let mut interpreter = Interpreter::new();
interpreter
    .insert_native_fn("cmp", fns::Compare)
    .insert_native_fn("if", fns::If)
    .insert_native_fn("map", fns::Map);
let ret = interpreter.evaluate(&block).unwrap();
assert_eq!(ret, Value::Bool(true));

Trait Implementations

impl Clone for Map

fn clone(&self) -> Map

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Map

impl Debug for Map

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<T> NativeFn<T> for Map where
    T: Grammar,
    T::Lit: Num + Neg<Output = T::Lit> + Pow<T::Lit, Output = T::Lit>, 

fn evaluate<'a>(
    &self,
    args: Vec<SpannedValue<'a, T>>,
    ctx: &mut CallContext<'_, 'a>
) -> EvalResult<'a, T>

Executes the function on the specified arguments.