:sig
String yaml_encode(DValue t)

:params
t : tree to serialize as YAML
return value : YAML string

:see
>markup
yaml_decode
json_encode
xml_encode
0_DValue

:content
Serializes a `DValue` into a compact YAML string for configuration files.

`yaml_encode()` focuses on the ordinary data shapes UCE apps use for config: nested maps, lists, strings, booleans, and numeric `f64` values. It does not emit YAML tags, anchors, aliases, or custom schema features.

Try the live example in the [YAML demo](../demo/yaml.uce).

Example:


Typical result:


Notes:

- Map keys are emitted in `DValue` map iteration order.
- Strings are left plain when safe and quoted when needed.
- Multiline strings are emitted as literal block scalars with `|`.
- Empty strings are emitted as `""` so they are not confused with YAML null.
- Decoded numeric-looking config values are strings unless the original `DValue` value was explicitly numeric.

:example
DValue value;
value["name"] = "Ada";
print(yaml_encode(value) != "" ? "yaml\n" : "empty\n");