:sig
String DValue::to_json(char quote_char = '"') const

:params
quote_char : quote character passed to string escaping
return value : JSON-ish scalar representation

:see
0_DValue
json_encode

:content
Returns the JSON scalar representation used by this low-level method: strings are escaped and quoted, numbers are emitted with `std::to_string`, bools as `true`/`false`, maps as `"(array)"`, pointers as `"(pointer)"`, and references as `"(reference)"`. For full structured encoding, use the runtime JSON helpers.

```cpp
print(context.props["title"].to_json());
```