(Swift) Eval JavaScript Returning String

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Note: This example requires Chilkat v11.4.0 or greater.

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func chilkatTest() {
    var success: Bool = false

    // This example demonstrates getting the completion value of a script,
    // where the last evaluated expression is a string.

    // The Javascript run in this example is shown below.

    // Load the JavaScript from a file.
    let sbScript = CkoStringBuilder()!
    success = sbScript.loadFile("js_eval_return_string.js", charset: "utf-8")
    if success == false {
        print("\(sbScript.lastErrorText!)")
        return
    }

    let js = CkoJs()!
    let result = CkoJsonObject()!

    // Run the JavaScript
    // Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
    // In this case, the last evaluated expression is a string.
    success = js.eval(sbScript, result: result)
    if success == false {
        print("\(sbScript.lastErrorText!)")
        return
    }

    result.emitCompact = false
    print("\(result.emit()!)")

    // Output:

    // {
    //   "type": "string",
    //   "value": "Ready for Chilkat.Js"
    // }

}

var status = "Ready";
var system = "Chilkat.Js";

// The last statement is an expression
status + " for " + system;