Struct Evaluator 

pub struct Evaluator<'a, E: Executor> { /* private fields */ }

Expression evaluator.

Evaluates AST expressions to values, using the provided scope for variable lookup and the executor for command substitution.

Implementations

impl<'a, E: Executor> Evaluator<'a, E>

pub fn new(scope: &'a mut Scope, executor: &'a mut E) -> Self

Create a new evaluator with the given scope and executor.

pub fn eval(&mut self, expr: &Expr) -> EvalResult<Value>

Evaluate an expression to a value.