dyaml/examples/representer/main.d
Ferdinand Majerech 210091a75f Fixed a bug which prevented dumping to file. Updated tutorials
and example with new information.
2011-10-15 16:31:23 +02:00

56 lines
1.3 KiB
D

import std.stdio;
import yaml;
struct Color
{
ubyte red;
ubyte green;
ubyte blue;
}
Node representColor(ref Node node, Representer representer)
{
//The node is guaranteed to be Color as we add representer for Color.
Color color = node.get!Color;
static immutable hex = "0123456789ABCDEF";
//Using the color format from the Constructor example.
string scalar;
foreach(channel; [color.red, color.green, color.blue])
{
scalar ~= hex[channel / 16];
scalar ~= hex[channel % 16];
}
//Representing as a scalar, with custom tag to specify this data type.
return representer.representScalar("!color", scalar);
}
void main()
{
try
{
auto representer = new Representer;
representer.addRepresenter!Color(&representColor);
auto resolver = new Resolver;
resolver.addImplicitResolver("!color", std.regex.regex("[0-9a-fA-F]{6}"),
"0123456789abcdefABCDEF");
auto dumper = Dumper("output.yaml");
dumper.representer = representer;
dumper.resolver = resolver;
auto document = Node([Color(255, 0, 0),
Color(0, 255, 0),
Color(0, 0, 255)]);
dumper.dump(document);
}
catch(YAMLException e)
{
writeln(e.msg);
}
}