google.protobuf.empty source code

1 module google.protobuf.empty;
2 
3 import std.json : JSONValue;
4 import google.protobuf;
5 
6 struct Empty
7 {
8     auto toProtobuf()
9     {
10         return cast(ubyte[]) null;
11     }
12 
13     Empty fromProtobuf(R)(ref R inputRange)
14     {
15         import std.range : drop;
16 
17         inputRange = inputRange.drop(inputRange.length);
18         return this;
19     }
20 
21     JSONValue toJSONValue()()
22     {
23         return JSONValue(cast(JSONValue[string]) null);
24     }
25 
26     Empty fromJSONValue()(JSONValue value)
27     {
28         import std.exception : enforce;
29         import std.json : JSON_TYPE;
30         import std.range : empty;
31 
32         if (value.type == JSON_TYPE.NULL)
33         {
34             return this;
35         }
36 
37         enforce!ProtobufException(value.type == JSON_TYPE.OBJECT && value.object.empty,
38             "Invalid google.protobuf.Empty JSON Encoding");
39 
40         return this;
41     }
42 }
43 
44 unittest
45 {
46     import std.range : empty;
47 
48     assert(Empty().toProtobuf.empty);
49     ubyte[] foo = [1, 2, 3];
50     Empty().fromProtobuf(foo);
51     assert(foo.empty);
52 }
53 
54 unittest
55 {
56     import std.json : JSON_TYPE;
57     import std.range : empty;
58 
59     assert(Empty().toJSONValue.type == JSON_TYPE.OBJECT);
60     assert(Empty().toJSONValue.object.empty);
61 }