@fauton/cfg/dist/utils/populateCfg.js

A package to work with context free grammars and LL1 parsers

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.populateCfg = void 0;
const extractTerminalsFromCfg_1 = require("../extractTerminalsFromCfg");
/**
 * Populates the variables and terminals of cfg via extraction
 * @param cfg Cfg to populate
 * @returns Populated cfg
 */
function populateCfg(cfg) {
    // TODO: Loop through all the production rules and extract variables from them
    if (!cfg.variables) {
        cfg.variables = Object.keys(cfg.productionRules);
    }
    if (!cfg.startVariable) {
        // eslint-disable-next-line
        cfg.startVariable = cfg.variables[0];
    }
    if (!cfg.terminals) {
        cfg.terminals = (0, extractTerminalsFromCfg_1.extractTerminalsFromCfg)({
            productionRules: cfg.productionRules,
            variables: cfg.variables,
        });
    }
    return cfg;
}
exports.populateCfg = populateCfg;