On 16/01/2015 12:16 a.m., anonymous wrote:
what's the right syntax for building a JSON tree ? I try to do like in
an AA but the program throw because the Key doesn't exist:
---
import std.stdio, std.json;
void main(string[] args)
{
struct Foo{
string a, b;
void writeToJson(ref JSONValue target) {
target["a"] = JSONValue(a);
target["b"] = JSONValue(b);
}
}
JSONValue root = parseJSON("{}");
root["items"] = JSONValue([""]);
Foo*[] foos;
foos ~= new Foo("a1","b1");
foos ~= new Foo("a2","b2");
foreach(foo; foos) {
root["items"].array.length += 1;
root["items"].array[$-1] = parseJSON("{}");
foo.writeToJson(root["items"].array[$-1]);
}
}
---
import std.stdio, std.json;
void main(string[] args)
{
struct Foo{
string a, b;
void writeToJson(ref JSONValue target) {
target["a"] = JSONValue(a);
target["b"] = JSONValue(b);
}
}
JSONValue root = ["items": cast(string[])[]];
Foo[] foos;
foos ~= Foo("a1","b1");
foos ~= Foo("a2","b2");
foreach(foo; foos) {
root["items"].array ~= JSONValue(foo.a);
root["items"].array ~= JSONValue(foo.b);
}
writeln(root.toString());
}
I would recommend keeping away from std.json. Its an old piece of code,
that needs to be replaced.
Vibe.d has a much nicer implementation that is really decent. I would
recommend that, if you are up to using the build manager dub.