2 /*! (c) 2020 Andrea Giammarchi */
4 const {parse: $parse, stringify: $stringify} = JSON;
7 const Primitive = String; // it could be Number
8 const primitive = 'string'; // it could be 'number'
11 const object = 'object';
13 const noop = (_, value) => value;
15 const primitives = value => (
16 value instanceof Primitive ? Primitive(value) : value
19 const Primitives = (_, value) => (
20 typeof value === primitive ? new Primitive(value) : value
23 const revive = (input, parsed, output, $) => {
25 for (let ke = keys(output), {length} = ke, y = 0; y < length; y++) {
27 const value = output[k];
28 if (value instanceof Primitive) {
29 const tmp = input[value];
30 if (typeof tmp === object && !parsed.has(tmp)) {
33 lazy.push({k, a: [input, parsed, tmp, $]});
36 output[k] = $.call(output, k, tmp);
38 else if (output[k] !== ignore)
39 output[k] = $.call(output, k, value);
41 for (let {length} = lazy, i = 0; i < length; i++) {
42 const {k, a} = lazy[i];
43 output[k] = $.call(output, k, revive.apply(null, a));
48 const set = (known, input, value) => {
49 const index = Primitive(input.push(value) - 1);
50 known.set(value, index);
54 const parse = (text, reviver) => {
55 const input = $parse(text, Primitives).map(primitives);
56 const value = input[0];
57 const $ = reviver || noop;
58 const tmp = typeof value === object && value ?
59 revive(input, new Set, value, $) :
61 return $.call({'': tmp}, '', tmp);
63 exports.parse = parse;
65 const stringify = (value, replacer, space) => {
66 const $ = replacer && typeof replacer === object ?
67 (k, v) => (k === '' || -1 < replacer.indexOf(k) ? v : void 0) :
69 const known = new Map;
72 let i = +set(known, input, $.call({'': value}, '', value));
74 while (i < input.length) {
76 output[i] = $stringify(input[i++], replace, space);
78 return '[' + output.join(',') + ']';
79 function replace(key, value) {
84 const after = $.call(this, key, value);
85 switch (typeof after) {
87 if (after === null) return after;
89 return known.get(after) || set(known, input, after);
94 exports.stringify = stringify;
96 const toJSON = any => $parse(stringify(any));
97 exports.toJSON = toJSON;
98 const fromJSON = any => parse($stringify(any));
99 exports.fromJSON = fromJSON;