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Thread: QList with "local type"

  1. #1
    Join Date
    Jan 2006
    Knivsta, Sweden
    Thanked 13 Times in 12 Posts
    Qt products
    Qt4 Qt5

    Default QList with "local type"

    Qt Code:
    1. #include <QList>
    3. int main(int , char ** )
    4. {
    5. struct Foo {
    6. int bar;
    7. };
    9. QList<Foo> foo;
    10. return 0;
    11. }
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    This short program fails to compile for me (using gcc-4.1.0): In function 'int main(int, char**)': error: 'main(int, char**)::Foo' uses local type 'main(int, char**)::Foo' error: trying to instantiate 'template<class T> class QList' error: invalid type in declaration before ';' token

    I can get it to compile by declaring the struct outside the method were it will be used, but since I only need it on one method it feels natural to declare it there.

    Not sure if this is a Qt problem or a gcc problem. Is there anyone who knows why you can't make a list of a locally declared struct?

  2. #2
    Join Date
    Oct 2006
    New Delhi, India
    Thanked 334 Times in 317 Posts
    Qt products
    Unix/X11 Windows

    Default Re: QList with "local type"

    Somewhere I found this -

    C++ Standard
    A local type, a type with no linkage, an unnamed type or a type compounded from any of these types shall not be used as a template-argument for a template type-parameter.
    These might help u further..

  3. The following user says thank you to aamer4yu for this useful post:

    drhex (11th April 2007)

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