Re: STL list code fires assertion in VC++ 2005, but not in VC++ 2003.

On Jun 29, 9:49 pm, Jason Doucette <jdouce...@gmail.com> wrote:


It's the "standard" solution anytime a function might not be
able to return a legitimate value. In its simplest form:

    template< typename T >
    class Fallible
    {
    public:
        Fallible()
            : myIsValid( false )
        {}
        Fallible( T const& value )
            : myIsValid( true )
            , myValue( value )
        {}

        bool isValid() const
        {
            return myIsValid ;
        }

        T const& value() const
        {
            assert( myIsValid ) ;
            return myValue ;
        }
    private:
        bool myIsValid ;
        T myValue ;
    } ;

For a version with all sorts of bells and whistles (and which
really goes beyond the concept of Fallible, and should probably
be several different classes), see the code at my site
(kanze.james.neuf.fr//code-en.html---subsystem Basic, component
Fallible). The one extension there that you probably do want is
the member function "elseDefaultTo()"; the rest is really
support for other uses.

--
James Kanze (Gabi Software) email: james.kanze@gmail.com
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