Struct Map 

pub struct Map;

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

Type

(using arithmetic-typing notation)

(['T; N], ('T) -> 'U) -> ['U; N]

Examples

let program = "
    xs = (1, -2, 3, -0.3);
    map(xs, |x| if(x > 0, x, 0)) == (1, 0, 3, 0)
";
let program = Untyped::<F32Grammar>::parse_statements(program)?;
let module = ExecutableModule::new("test_map", &program)?;

let mut env = Environment::new();
env.insert_native_fn("if", fns::If).insert_native_fn("map", fns::Map);
assert_eq!(module.with_env(&env)?.run()?, Value::Bool(true));

Trait Implementations

impl Clone for Map

fn clone(&self) -> Self

Returns a duplicate 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 Default for Map

fn default() -> Self

Returns the “default value” for a type.

impl<T: 'static + Clone> NativeFn<T> for Map

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

Executes the function on the specified arguments.