Attach comment to an empty object

[tomsaz]

attachComments method doesn't work for empty objects.
Code:

var ast = esprima.parse("var obj = { /*comment*/ };", { tokens: true, range: true, comment: true });
ast = escodegen.attachComments(ast, ast.comments, ast.tokens);
escodegen.generate(ast, { comment: true });

Result:

"var obj = {};"

In case of not empty object getting correct result.
Code:

var ast = esprima.parse("var obj = { /*comment*/ x: 0 };", { tokens: true, range: true, comment: true });
ast = escodegen.attachComments(ast, ast.comments, ast.tokens);
escodegen.generate(ast, { comment: true });

Result:

"var obj = {
    /*comment*/
    x: 0
};"

Is this a bug ?

[RReverser]

Not really a bug. Problem with comments is that in AST they can be attached only to real nodes as leading/trailing comments. In contexts like yours and similar ({ /**/ }, function f(/**/) {}, etc.) there is no preceding / acceding node to attach comment to, so they're lost.

[gadisn]

I've also came across this behavior.
In my case I get JS from external source, I modify a part of the the AST, and I would like to return the original source which I haven't modified in the same shape I got it.

Would it be possible to add a third type of comment – e.g. inline comment, which will be applicable only in these cases – a container without inner nodes?

Thanks.