lisp-js-compiler/lib/parser.js

JavaScript compiler / interpreter for Lisp language

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const tokenizer_1 = require("./tokenizer");
// A node can be a list, atom, number, string
function parse(tokens) {
    let list;
    let path = [];
    for (let i = 0, token; token = tokens[i]; i++) {
        if (tokenizer_1.openListDelimiters.indexOf(token) !== -1) {
            if (!list) {
                list = [];
            }
            else {
                setPath([], path, list);
            }
            path.push(0);
        }
        else if (tokenizer_1.closeListDelimiters.indexOf(token) !== -1) {
            path.pop();
            path[path.length - 1]++;
        }
        else {
            setPath(token, path, list);
            path[path.length - 1]++;
        }
    }
    return list;
}
exports.parse = parse;
function getPath(path, tree) {
    let value = tree;
    for (let i = 0, len = path.length; i < len; i++) {
        value = value[path[i]];
    }
    return value;
}
exports.getPath = getPath;
function setPath(value, path, tree) {
    getPath(path.slice(0, path.length - 1), tree)[path[path.length - 1]] = value;
    return tree;
}
exports.setPath = setPath;
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