Json in D: clean, simple API

[aberba via Digitalmars-d]

On Thursday, 11 May 2017 at 20:36:13 UTC, Adam D. Ruppe wrote:
> On Thursday, 11 May 2017 at 20:22:22 UTC, aberba wrote:
>> With that i meant designing of a simple-clean api
>
> my jsvar.d works kinda similarly to javascript... though i 
> wouldn't call it "clean" because it will not inform you of 
> missing stuff.
>
> jsvar.d is here:
> https://raw.githubusercontent.com/adamdruppe/arsd/master/jsvar.d
>
> ---
>
> // dmd test.d jsvar.d
> import arsd.jsvar;
> import std.stdio;
>
> void main() {
> 	// reading json with `var.fromJson`
> 	var obj = var.fromJson(`{"a":{"b":10},"c":"hi"}`);
> 	// inspecting contents
> 	writeln(obj.a);
> 	writeln(obj.a.b);
> 	writeln(obj.c);
>
> 	// convert to basic static type with `.get!T`
> 	string c = obj.c.get!string;
>
> 	// change the contents with dot notation
> 	obj.a = 15;
> 	obj.d = "add new field too";
>
> 	writeln(obj);
>
> 	struct Test {
> 		int a;
> 		string c;
> 	}
>
> 	// can even get plain structs out
> 	Test test = obj.get!Test;
> 	writeln(test);
>
> 	// and set structs
> 	test.c = "from D";
> 	obj = test;
> 	writeln(obj);
>
> 	// writeln on an object prints it in json
> 	// or you can explicitly do
>
> 	writeln(obj.toJson());
>
>
>
> 	// big thing is referencing non-existent
> 	// things is not an error, it just propagates null:
> 	writeln(obj.no.such.property); // null
> 	// but that can be convenient
> }
> ---

Something like this is exactly what I'm talking about. 
Vibe.data.json also has:

// using piecewise construction
Json j2 = Json.emptyObject;
j2["field1"] = "foo";
j2["field2"] = 42.0;
j2["field3"] = true;


D doesn't seem to be the blocker for these convenient 
abstractions.