Struct arithmetic_eval::fns::Merge

pub struct Merge;

Function that merges two tuples.

Type

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

Examples

let program = r#"
    # Merges all arguments (which should be tuples) into a single tuple.
    super_merge = |...xs| fold(xs, (), merge);
    super_merge((1, 2), (3,), (), (4, 5, 6)) == (1, 2, 3, 4, 5, 6)
"#;
let block = F32Grammar::parse_statements(Span::new(program)).unwrap();

let mut interpreter = Interpreter::new();
interpreter
    .insert_native_fn("fold", fns::Fold)
    .insert_native_fn("merge", fns::Merge);
let ret = interpreter.evaluate(&block).unwrap();
assert_eq!(ret, Value::Bool(true));

Trait Implementations

impl Clone for Merge

fn clone(&self) -> Merge

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Merge

impl Debug for Merge

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

Formats the value using the given formatter.

impl<T> NativeFn<T> for Merge 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.