Struct cl_interpret::builtin::sub

pub struct sub;

Subtraction a - b

builtin! fn sub (lhs, rhs) -> IResult<ConValue>
{
    Ok(match (lhs, rhs) {
            (ConValue::Empty, ConValue::Empty) => ConValue::Empty,
            (ConValue::Int(a), ConValue::Int(b)) => ConValue::Int(a - b),
            _ => Err(Error::TypeError)?,
        })
}

Trait Implementations

impl BuiltIn for sub

fn description(&self) -> &str

impl Callable for sub

fn call(&self, env: &mut Environment, args: &[ConValue]) -> IResult<ConValue>

Calls this Callable in the provided Environment, with ConValue args
The Callable is responsible for checking the argument count and validating types

fn name(&self) -> Sym

Returns the common name of this identifier.

impl Clone for sub

fn clone(&self) -> sub

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for sub

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

Formats the value using the given formatter.