JSON in Hoshi-lang

The json standard library module provides functionality for parsing JSON data.

<tt>parse</tt> Function

The parse function takes a str.Str object containing JSON data and returns a lang.Result<JSONValue, str.Str>.

• If parsing is successful, the Result will be an Ok containing a JSONValue.
• If parsing fails, the Result will be an Err containing an error message.

<tt>JSONValue</tt> Interface

The JSONValue interface is a marker interface for the different types of JSON values:

• str.Str: For JSON strings.
• Numeric: For JSON numbers.
• JSONNull: For JSON null.
• JSONDict: For JSON objects (a hashMap.HashMap<str.Str, JSONValue>)
• JSONList: For JSON arrays (a vec.Vec<JSONValue>)

Example

use json "json"
use str "str"
 
func main() : int {
    let s = str.Str("{\"a\": 1, \"b\": \"hello\"}")
    let result = json.parse(s)
    if (result.is_ok()) {
        let json_obj = result.unwrap() as json.JSONDict
        let a = json_obj["a"] as json.Numeric
        let b = json_obj["b"] as str.Str
    }
    return 0
}