mist-parser 0.1.1

The Mist programming language parser
Documentation 
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pub mod common;
pub mod items;

use crate::Rule;

pub fn listen_rule(pairs: &mut pest::iterators::Pairs<'_, Rule>, rule: Rule) -> bool {
    let consumed = pairs
        .peek()
        .map(|p| p.as_rule() == rule)
        .unwrap_or_default();

    if consumed {
        pairs.next();
    }

    consumed
}

pub fn consume_rule<'a>(
    pairs: &mut pest::iterators::Pairs<'a, Rule>,
    rule: Rule,
) -> Option<pest::iterators::Pair<'a, Rule>> {
    let consumed = pairs
        .peek()
        .map(|p| p.as_rule() == rule)
        .unwrap_or_default();

    if consumed { pairs.next() } else { None }
}