foo(20.5, "hello", new Object())

QScriptValue Person_prototype_fullName(QScriptContext *context, QScriptEngine *engine)
{
    QScriptValue self = context->thisObject();
    QString result;
    result += self.property("firstName").toString();
    result += QLatin1String(" ");
    result += self.property("lastName").toString();
    return result;
}

QScriptValue myInclude(QScriptContext *ctx, QScriptEngine *eng)
{
    QString fileName = ctx->argument(0).toString();
    QString contents = readTheFile(fileName);
    ctx->setActivationObject(ctx->parentContext()->activationObject());
    ctx->setThisObject(ctx->parentContext()->thisObject());
    return eng->evaluate(contents, fileName);
}

Member Function Documentation

QScriptContext::~QScriptContext()

Destroys this QScriptContext.

QScriptValue QScriptContext::activationObject() const

Returns the activation object of this QScriptContext. The activation object provides access to the local variables associated with this context.

Note: The activation object might not be available if there is no active QScriptEngineAgent, as it might be optimized.

See also setActivationObject(), argument(), and argumentsObject().

QScriptValue QScriptContext::argument(int index) const

Returns the function argument at the given index.

If index >= argumentCount(), a QScriptValue of the primitive type Undefined is returned.

See also argumentCount().

int QScriptContext::argumentCount() const

Returns the number of arguments passed to the function in this invocation.

Note that the argument count can be different from the formal number of arguments (the length property of callee()).

See also argument().

QScriptValue QScriptContext::argumentsObject() const

Returns the arguments object of this QScriptContext.

The arguments object has properties callee (equal to callee()) and length (equal to argumentCount()), and properties 0, 1, ..., argumentCount() - 1 that provide access to the argument values. Initially, property P (0 <= P < argumentCount()) has the same value as argument(P). In the case when P is less than the number of formal parameters of the function, P shares its value with the corresponding property of the activation object (activationObject()). This means that changing this property changes the corresponding property of the activation object and vice versa.

See also argument() and activationObject().

QStringList QScriptContext::backtrace() const

Returns a human-readable backtrace of this QScriptContext.

Each line is of the form <function-name>(<arguments>)@<file-name>:<line-number>.

To access individual pieces of debugging-related information (for example, to construct your own backtrace representation), use QScriptContextInfo.

See also QScriptEngine::uncaughtExceptionBacktrace(), QScriptContextInfo, and toString().

QScriptValue QScriptContext::callee() const

Returns the callee. The callee is the function object that this QScriptContext represents an invocation of.

QScriptEngine *QScriptContext::engine() const

Returns the QScriptEngine that this QScriptContext belongs to.

bool QScriptContext::isCalledAsConstructor() const

Returns true if the function was called as a constructor (e.g. "new foo()"); otherwise returns false.

When a function is called as constructor, the thisObject() contains the newly constructed object to be initialized.

Note: This function is only guaranteed to work for a context corresponding to native functions.

QScriptContext *QScriptContext::parentContext() const

Returns the parent context of this QScriptContext.

void QScriptContext::setActivationObject(const QScriptValue &activation)

Sets the activation object of this QScriptContext to be the given activation.

If activation is not an object, this function does nothing.

Note: For a context corresponding to a JavaScript function, this is only guaranteed to work if there was an QScriptEngineAgent active on the engine while the function was evaluated.

See also activationObject().

void QScriptContext::setThisObject(const QScriptValue &thisObject)

Sets the `this' object associated with this QScriptContext to be thisObject.

If thisObject is not an object, this function does nothing.

See also thisObject().

QScriptContext::ExecutionState QScriptContext::state() const

Returns the frameution state of this QScriptContext.

QScriptValue QScriptContext::thisObject() const

Returns the `this' object associated with this QScriptContext.

See also setThisObject().

QScriptValue QScriptContext::throwError(QScriptContext::Error error, const QString &text)

Throws an error with the given text. Returns the created error object.

The text will be stored in the message property of the error object.

The error object will be initialized to contain information about the location where the error occurred; specifically, it will have properties lineNumber, fileName and stack. These properties are described in Qt Script Extensions to ECMAScript.

See also throwValue() and state().

QScriptValue QScriptContext::throwError(const QString &text)

This is an overloaded function.

Throws an error with the given text. Returns the created error object.

See also throwValue() and state().

QScriptValue QScriptContext::throwValue(const QScriptValue &value)

Throws an exception with the given value. Returns the value thrown (the same as the argument).

See also throwError() and state().

QString QScriptContext::toString() const

Returns a string representation of this context. This is useful for debugging.

This function was introduced in Qt 4.4.

See also backtrace().