Trait ripin::evaluate::Evaluate

pub trait Evaluate<T> {
    type Err;
    fn operands_needed(&self) -> usize;
    fn operands_generated(&self) -> usize;
    fn evaluate(self, stack: &mut Stack<T>) -> Result<(), Self::Err>;
}

The main Trait allowing evaluation of operations on Operands.

Associated Types

type Err

The type returned in the event of an evaluation error.

Required Methods

fn operands_needed(&self) -> usize

Returns the number of operand this Evaluator needs and will pop() from the stack.

fn operands_generated(&self) -> usize

Returns the number of operand this Evaluator will generate and will push() in the stack.

fn evaluate(self, stack: &mut Stack<T>) -> Result<(), Self::Err>

Execute the evaluation with the given stack, returns the Evaluation error if something goes wrong.

Implementors

• impl<T: Float> Evaluate<T> for FloatEvaluator<T>
• impl<T: PrimInt + Signed> Evaluate<T> for IntEvaluator<T>