jaypha.json source code

1 // Written in the D programming language.
2 /*
3  * Copyright 2015 Jaypha
4  *
5  * Distributed under the Boost Software License, Version 1.0.
6  * (See http://www.boost.org/LICENSE_1_0.txt)
7  *
8  * Authors: Jason den Dulk
9  */
10 
11 module jaypha.json;
12 
13 //--------------------------------------------------------------------------
14 // Functons for comverting from a JSON value.
15 
16 import std.array;
17 import std.conv;
18 public import std.json;
19 import std.traits;
20 
21 T fromJSON(T)(JSONValue jVal) if (isScalarType!T || isSomeString!T)
22 {
23   final switch (jVal.type)
24   {
25     case JSON_TYPE.TRUE:
26       return to!T(true);
27     case JSON_TYPE.FALSE:
28       return to!T(false);
29     case JSON_TYPE.INTEGER:
30       return to!T(jVal.integer);
31     case JSON_TYPE.UINTEGER:
32       return to!T(jVal.uinteger);
33     case JSON_TYPE.FLOAT:
34       return to!T(jVal.floating);
35     case JSON_TYPE.STRING:
36       return to!T(jVal.str);
37     case JSON_TYPE.OBJECT:
38     case JSON_TYPE.ARRAY:
39       assert(false);
40     case JSON_TYPE.NULL:
41       return T.init;
42   }
43 }
44 
45 //--------------------------------------------------------------------------
46 
47 T[] fromJSON(T:T[])(JSONValue jVal) if (!isSomeString!(T[]))
48 {
49   assert(jVal.type == JSON_TYPE.ARRAY);
50   auto app = appender!(T[])();
51   foreach (val; jVal.array)
52     app.put(fromJSON!T(val));
53   return app.data;
54 }
55 
56 //--------------------------------------------------------------------------
57 
58 T[string] fromJSON(T:T[string])(JSONValue jVal)
59 {
60   assert(jVal.type == JSON_TYPE.OBJECT);
61   T[string] ret;
62   foreach (idx,val; jVal.object)
63     ret[idx] = fromJSON!T(val);
64   return ret;
65 }