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Qt-interest Archive, March 2002
QArray and QString

• Subject: QArray and QString
• From: Liming Tsai <ltsai79@xxxxxxxxx>
• Date: Sun, 24 Mar 2002 19:35:25 -0800 (PST)
• To: qt-interest@xxxxxxxxxxxxx

Hello,

I'm getting seg faults when I try to assign a string
to a QString within a QArray. Is this a bug or a
problem with my code?

QArray<QString> str(10);
str[0] = "a"; // Seg fault
str[1] = "b";
str[0] = str[1];

Thanks
Liming
Qt Non-Commercial 2.3.0
VSC++ SP5

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• Subject: RE: QArray and QString
• From: "Bachrach, Robert L" <rob.bachrach@xxxxxxxxxxxxxxxxxxx>
• Date: Mon, 25 Mar 2002 07:04:49 -0500
• Cc: qt-interest@xxxxxxxxxxxxx
• To: "'ltsai79@xxxxxxxxx'" <ltsai79@xxxxxxxxx>

Liming Tsai wrote:
> I'm getting seg faults when I try to assign a string
> to a QString within a QArray. Is this a bug or a
> problem with my code?

The documentation for QArray reads:

  QArray stores the array elements directly in the array.
  It can only deal with simple types, i.e. C++ types, structs
  and classes that have no constructors, destructors or virtual
  functions. QArray uses bitwise operations to copy and compare
  array elements.

By this definition, a QString is not a simple type.
You may consider using a QStringList instead.  It is not as
time efficient as an array would be, but it works fairly well.

Rob