What's the purpose of the Newtonsoft.Json.JsonToken.StartConstructor token?

Question

The JsonToken enum in Newtonsoft.Json namespace contains, among others, the entry JsonToken.StartConstructor.

I most likely misinterpret the meaning of this token, as I take it for granted that JS's constructor methods are not valid in JSON, the same as there are no function, expression, or var tokens.

So how would a constructor be manifested in JSON, if that's what it is?

Answer 1

Looking at the ParseTests source code, it looks like it's so that you can have JSON like this:

{ "date": new Date(2017, 2, 10) }

... which isn't actually valid JSON, but may be common in the wild.