parseit.js/build/parser/util.js

Customizable parsing library for converting a list of tokens into an AST tree

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.tokenShouldBeIgnored = exports.adaptNodeData = exports.tokenMatches = exports.isToken = exports.isRule = void 0;
const rule_1 = require("../grammar/rule");
function isRule(item) {
    return item instanceof rule_1.GrammarAtom && item.type == rule_1.GrammarAtomType.RULE;
}
exports.isRule = isRule;
function isToken(item) {
    return item instanceof rule_1.GrammarAtom && item.type == rule_1.GrammarAtomType.TOKEN;
}
exports.isToken = isToken;
function tokenMatches(token, item) {
    if (!token)
        return false;
    const matchValue = item.value !== undefined ? token.value == item.value : true;
    return token
        && item.type == rule_1.GrammarAtomType.TOKEN
        && token.type == item.name
        && matchValue;
}
exports.tokenMatches = tokenMatches;
function adaptNodeData(data, rule) {
    if (rule.match == rule_1.GrammarRuleSpecialMatch.PASS) {
        return data[0];
    }
    else if (rule.match == rule_1.GrammarRuleSpecialMatch.FUNC) {
        return rule.func(data);
    }
    else {
        const targetNode = rule.match;
        return new targetNode(...data);
    }
}
exports.adaptNodeData = adaptNodeData;
function tokenShouldBeIgnored(token, grammar, rule) {
    if (!token)
        return;
    const atom = grammar.getIgnored(token, rule);
    return atom && tokenMatches(token, atom);
}
exports.tokenShouldBeIgnored = tokenShouldBeIgnored;
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