@masala/parser/build/lib/standard/json/jsonparser.js

Masala Parser

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _genlex = require('../../genlex/genlex');

var _index = require('../../parsec/index');

var _parsec = require('../../parsec');

//
// Facilities
//

var genlex = new _genlex.GenLex(); /*
                                    * Parsec
                                    * https://github.com/d-plaindoux/parsec
                                    *
                                    * Copyright (c) 2016 Didier Plaindoux
                                    * Licensed under the LGPL2 license.
                                    */

genlex.keywords(['null', 'false', 'true', '{', '}', '[', ']', ':', ',']);
var number = genlex.tokenize(_parsec.N.number(), 'number', 1100);
var string = genlex.tokenize(_parsec.C.stringLiteral(), 'string', 800);

function tkKey(s) {
    return genlex.get(s);
}

// unit -> Parser ? Token
function arrayOrNothing() {
    // FIXME: ES2015 code not great
    var value = [],
        addValue = function addValue(e) {
        value = value.concat(e);
    },
        getValue = function getValue() {
        return value;
    },
        item = _index.F.lazy(expr).map(addValue);
    return item.then(tkKey(',').thenRight(item).optrep().array()).opt().map(getValue);
}

// unit -> Parser ? Token
function objectOrNothing() {
    // FIXME: ES2015 code not great
    var value = {},
        addValue = function addValue(e) {
        value[e[0]] = e[1];
    },
        getValue = function getValue() {
        return value;
    },
        attribute = string.thenLeft(tkKey(':')).then(_index.F.lazy(expr)).array().map(addValue);
    return attribute.thenLeft(tkKey(',').then(attribute).optrep()).array().opt().map(getValue);
}

// unit -> Parser ? Token
function expr() {
    return number.or(string).or(tkKey('null').returns(null)).or(tkKey('true').returns(true)).or(tkKey('false').returns(false)).or(tkKey('[').thenRight(_index.F.lazy(arrayOrNothing)).thenLeft(tkKey(']')).single()).or(tkKey('{').thenRight(_index.F.lazy(objectOrNothing)).thenLeft(tkKey('}')).single());
}

//const parse =
exports.default = {
    parse: function parse(source) {

        var parser = genlex.use(expr().thenLeft(_index.F.eos()).single());

        return parser.parse(source, 0);
    }
};
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