Struct cl_interpret::builtin::neg

pub struct neg;

Negates the ConValue

builtin! fn neg (tail) -> IResult<ConValue>
{
    Ok(match tail {
            ConValue::Empty => ConValue::Empty,
            ConValue::Int(v) => ConValue::Int(-v),
            _ => Err(Error::TypeError)?,
        })
}

Trait Implementations

impl BuiltIn for neg

fn description(&self) -> &str

impl Callable for neg

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 neg

fn clone(&self) -> neg

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for neg

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

Formats the value using the given formatter.