Struct calc_lib::Evaluator

pub struct Evaluator<'input, 'cache, 'prev, 'exp> { /* private fields */ }

Evaluates the supplied input.

Implementations

impl<'input, 'cache, 'prev, 'exp> Evaluator<'input, 'cache, 'prev, 'exp>

pub fn new( utf8: &'input [u8], cache: &'cache mut Cache<Ratio<BigInt>, 8>, prev: &'prev mut Option<Ratio<BigInt>>, exp_cache: &'exp mut Vec<Ratio<BigInt>> ) -> Evaluator<'input, 'cache, 'prev, 'exp>

Creates an Evaluator<'input, 'cache, 'prev, 'exp> based on the supplied arguments.

pub fn evaluate(self) -> Result<O<'prev>, LangErr>

Evaluates the input consuming the Evaluator<'input, 'cache, 'exp>. Requires the input to contain one expression (i.e., if there are multiple newlines, it will error).

Errors

Returns a LangErr iff the input violates the calc language.