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Type: Task
Resolution: Won't Do
Priority: P4: Low
Fix Version/s: None
Affects Version/s: None
Component/s: Qt Script
Labels:
None

Parts of the QtScript API and runtime expose behaviors that reflect the implementation of the old (Qt 4.5) back-end.

It has proven difficult to implement the exact behavior on top of other JavaScript engines, such as JavaScriptCore (JSC) and V8.

Not all of this behavior is documented, but some of it is.
The behavior is tested in the QtScript autotests, and a lot of the cases are currently treated on an equal level with the "standard"/"officially sanctioned" behavior.

This task collects the behaviors in question. The aim is, for each case, to document why the behavior is like that (e.g., freak accident, or is it actually well-thought-out and useful?), and assess the importance of keeping the old behavior (i.e., what is the perceived impact of changing it).

As an overall goal, we would like the QtScript back-end integration layer to be as thin as possible; this means trying to avoid "magic" code that only serves to satisfy behavior that perhaps nobody relies (or should rely) on.

depends on

QTBUG-10313 [Reg] parentContext->activationObject() can return the wrong object when called from a native QtScript function

Closed

QTBUG-11012 [Reg] Crash / incorrect result when setting custom scope chain for a native context

Closed

QTBUG-17612 [Reg] Dynamic C++ property overrides JS property

Closed

QTBUG-6132 QScriptContext::isCalledAsConstructor() returns the wrong result for JS contexts when JIT is enabled

Closed

QTBUG-6133 QScriptContextInfo::functionMetaIndex() doesn't return the correct index for overloaded slots

Closed

QTBUG-6135 [Reg] 'debugger' statement returns undefined regardless of QScriptEngineAgent's return value

Closed

QTBUG-6136 QRegExp <--> RegExp conversion is not fully bidirectional

Closed

QTBUG-6138 [Reg] Error objects lack lineNumber and fileName properties when they're not thrown

Closed

QTBUG-6139 QScriptEngine::uncaughtExceptionBacktrace() doesn't give a full backtrace

Closed

QTBUG-6140 eval() do not provide callbacks for QScriptEngineAgent

Closed

QTBUG-10302 Since 4.6, QScriptValue::isFunction() returns true for regular expression objects

Closed

QTBUG-15956 [Reg] Error objects no longer provide a "stack" property

Closed

QTBUG-17131 [Reg] Scope chain changes due to "with" statement isn't observable in QScriptContext

Closed

QTBUG-17287 QScriptContext can return wrong arguments in callback from built-in ECMA function

Closed

QTBUG-17604 [Reg] Attempting to convert an activation object to a string results in a TypeError

Closed

QTBUG-17616 [Reg] JS getter that throws exception is not returned by QScriptValue::property()

Closed

QTBUG-17842 [Reg] Missing line number in backtrace when function calls eval()

Closed

QTBUG-6142 PostionChange QScriptEngineAgent callback

Closed

QTBUG-6187 QScriptEngineAgent callbacks are not called in rar cases

Closed

QTBUG-9737 [Reg] Changing Global Object's prototype from JavaScript is not reflected on the C++ side

Closed

QTBUG-17136 [Reg] Activation object of native calls no longer has an arguments property

Closed

QTBUG-17599 [Reg] QScriptClass::name() is not used in object's default string representation

Closed

QTBUG-17602 [Reg] QScriptContextInfo::columnNumber() always returns -1

Closed

QTBUG-17605 [Reg] Local variables implemented as getter/setter properties on the activation object no longer works

Closed

QTBUG-17609 [Reg] QScriptEngineAgent::positionChange() callback always reports column number as 1

Closed

QTBUG-17615 [Reg] User-range flags (QScriptValue::UserRange) not retained for getter/setter properties

Closed

QTBUG-17617 [Reg] Undeletable properties can't be deleted from C++

Closed

relates to

QTBUG-15571 QtScript: Deprecate APIs that reflect implementation of old ("classic") back-end

Closed

(22 depends on, 1 relates to)

1.	"arguments" variable when calling QScriptEngine::evaluate() from a native function		Closed	Kent Hansen (Inactive)
2.	QtScript overloads comparison operator == for QObject and QVariant wrappers		Closed	Kent Hansen (Inactive)

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Assignee:: Unassigned

Reporter:: Kent Hansen (Inactive)

Votes:: 0 Vote for this issue

Watchers:: 3 Start watching this issue

Created:: 11 Jan '11 10:38

Updated:: 22 Jan '19 14:42

Resolved:: 22 Jan '19 14:42

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