external & build dependences in src tree

- external & build dependences boost licensed
  - ext_depends (external depends)
    - D-YAML
      - tinyendian
    - d2sqlite3
    - imageformats
  - build_depends
    - dub2nix

1 files changed, 43 insertions, 0 deletions

diff --git a/src/ext_depends/D-YAML/examples/representer/main.d b/src/ext_depends/D-YAML/examples/representer/main.d
new file mode 100644
index 0000000..18ec4c5
--- /dev/null
+++ b/src/ext_depends/D-YAML/examples/representer/main.d
@@ -0,0 +1,43 @@
+import std.stdio;
+import dyaml;
+
+struct Color
+{
+   ubyte red;
+   ubyte green;
+   ubyte blue;
+
+   Node opCast(T: Node)() const
+   {
+       static immutable hex = "0123456789ABCDEF";
+
+       //Using the color format from the Constructor example.
+       string scalar;
+       foreach(channel; [red, green, blue])
+       {
+           scalar ~= hex[channel / 16];
+           scalar ~= hex[channel % 16];
+       }
+
+       //Representing as a scalar, with custom tag to specify this data type.
+       return Node(scalar, "!color");
+   }
+}
+
+void main()
+{
+   try
+   {
+       auto dumper = dumper();
+
+       auto document = Node([Color(255, 0, 0),
+                             Color(0, 255, 0),
+                             Color(0, 0, 255)]);
+
+       dumper.dump(File("output.yaml", "w").lockingTextWriter, document);
+   }
+   catch(YAMLException e)
+   {
+       writeln(e.msg);
+   }
+}