Raise Event question

rgb

Summary

RaiseEvent can work with byref parameter ?

Have Method:

Test(row As integer, ByRef ret As boolean)

i test:

var result as boolean = true

Raise Event Test(100,rt)

app crash:

Bug or not supported in objo

Fatal VM exception: System.InvalidCastException: Expected Ref but got Boolean.
at Objo.VM.Value.ThrowInvalidCast(ObjoType expected)
at Objo.VM.Value.get_AsRef()
at Objo.VM.VM.Run(Int32 exitAtFp)
at Objo.VM.VM.InvokeMethod(ObjoClosure method, Value receiver, Value[] args,
Boolean allowWhileStopRequested) at Objo.StdLib.Desktop.ControlMethods.CallEventHandler(VM vm, ObjoInstance ev
entSource, Value handler, Value[] args) at Objo.StdLib.Desktop.ControlMethods.FireEvent(VM vm, ObjoInstance instance,
String eventName, Value[] args) at Objo.StdLib.Desktop.ControlMethods.<>c__DisplayClass34_1.<WireBaseEventsOn

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Garry

Yes, that should work, but you’ve found a bug.

ByRef works for normal method calls, but the current RaiseEvent path is passing the Boolean value itself to the handler instead of wrapping it as a ByRef reference. That’s why the VM crashes with:

Expected Ref but got Boolean

Crashing is definitely not correct behaviour. This has been fixed in the next release so RaiseEvent handles ByRef parameters correctly: https://feedback.objo.dev/bug/345