QList<MyClass> to const QList<const MyClass>

[juanluispaz]

Hello, How can I cast a QList to a constant QList of constant values without create a new QList (create a constant view of the list)

Example:

// This not compile
QList<MyClass> a;
// ...
const QList<const MyClass> b = a;

// This not compile
QList<MyClass> a;
// ...
const QList<const MyClass> b = a;

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I want to use this for return the list as constant (with constant values too).

[axeljaeger]

const QList<const MyClass> b(a); could work.

[juanluispaz]

I tested this solution, but does not compile.

Thank you for reply.

[axeljaeger]

What is the error message?

[juanluispaz]

The error message is:

error: no matching function for call to 'QList<const MyClass>::QList(QList<MyClass>&)'
note: candidates are: QList<T>::QList(const QList<T>&) [with T = const MyClass]
note:                 QList<T>::QList() [with T = const MyClass]

error: no matching function for call to 'QList<const MyClass>::QList(QList<MyClass>&)'
note: candidates are: QList<T>::QList(const QList<T>&) [with T = const MyClass]
note:                 QList<T>::QList() [with T = const MyClass]

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In this moment, I am using Qt 4.6 (2010.02.1) with wingw