Enum Builtin

pub enum Builtin {
    Len,
    First,
    Last,
    Rest,
    Push,
    Puts,
}

Built-in function provided by Monkey.

Variants

Len

Return the length of an iterable Monkey object.

First

Return the first element of a given array.

Last

Return the last element of a given array.

Rest

Return a new array containing all the elements of the array passed as argument, except for the first one

Push

Allocates a new array with the same elements as the array passed as argument with the addition of the new, pushed element.

Puts

Prints the given arguments to STDOUT

Implementations

impl Builtin

pub fn lookup(name: &str) -> Option<Object>

Lookup and retrieve a builtin function object by name/ identifier, if it exists.

pub fn apply(&self, args: &[Rc<Object>]) -> Result<Rc<Object>, EvaluationError>

Apply the builtin function on the passed arguments slice.

Trait Implementations

impl Clone for Builtin

fn clone(&self) -> Builtin

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Builtin

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

Formats the value using the given formatter.

impl Display for Builtin

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

Formats the value using the given formatter.

impl PartialEq for Builtin

fn eq(&self, other: &Builtin) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Builtin

impl StructuralPartialEq for Builtin