/
generate.js
49 lines (44 loc) · 1.14 KB
/
generate.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
var util = require('util')
, Symbol = require('./symbol')
, Cons = require('./cons');
var generate = function(obj, options) {
var result;
options = options || { object: 'alist' };
switch (typeof obj) {
case 'string':
result = '"' + obj + '"';
break;
case 'boolean':
result = obj ? 't' : 'nil';
break;
case 'object':
if (obj === null) {
result = 'nil';
} else if (util.isArray(obj)) {
if (obj.length) {
result = '(' + obj.map(function(v) { return generate(v) }).join(' ') + ')';
} else {
result = 'nil';
}
} else if (obj instanceof Symbol) {
result = obj.toString();
} else if ('car' in obj && 'cdr' in obj) {
result = '(' + generate(obj.car) + ' . ' + generate(obj.cdr) + ')';
} else {
result = [];
for (var key in obj) {
result.push(generate(new Cons(key, obj[key])));
}
result = '(' + result.join(' ') + ')';
}
break;
case 'function':
throw new Error('Function object cannt convert sexpression');
break;
default:
result = obj.toString();
break;
}
return result;
};
module.exports = generate;