Struct Builtin 

pub struct Builtin {
    pub name: String,
    pub body: fn(Vec<Expression>, &mut Environment) -> Result<Expression, Error>,
    pub help: String,
}

Fields

name: String

name of the function

body: fn(Vec<Expression>, &mut Environment) -> Result<Expression, Error>

function pointer for executing the function

help: String

help string

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: &Self) -> 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.