Core C++, 2 of N: Template Argument Deduction -- Stephan T. Lavavej

By Blog Staff | Jul 9, 2012 07:35 PM | Tags: advanced

Core C++, 2 of N: Template Argument Deduction -- Stephan T. Lavavej

Stephan T. Lavavej, aka STL, will take us on a journey of discovery within the exciting world of Core C++. We know lots of folks are either coming back to C++, coming to C++, or have never left C++. This lecture series, in n parts, is for all of you! Only STL can make that work (novice, intermediate, and advanced all bundled together and presented in a way only STL can do).

In part 2, STL will teach us all about Template Argument Deduction. Template arguments are deduced when a call is made to a template function, but some or all template arguments are omitted. The compiler will attempt to deduce the intended template arguments. In most cases, this works as expected. If it does not, a compilation error occurs, in which case you should specify the template arguments explicitly. Now, let's see what Stephan has to say about this.

Tune in. Learn.

Core C++, 1 of N: Name Lookup -- Stephan T. Lavavej

By Blog Staff | May 16, 2012 07:30 PM | Tags: intermediate advanced

Core C++, 1 of N: Name Lookup -- Stephan T. Lavavej

Stephan T. Lavavej, aka STL, will take us on a journey of discovery within the exciting world of Core C++. We know lots of folks are either coming back to C++, coming to C++, or have never left C++. This lecture series, in n parts, is for all of you! Only STL can make that work (novice, intermediate, and advanced all bundled together and presented in a way only STL can do).

In the following code, which functions are called? Why? Analyze the implications?

namespace A {
      struct X;
      struct Y;
      void f( int );
      void g( X );
}

namespace B {
       void f( int i ) {
            f( i );   // which f()?
        }
        void g( A::X x ) {
             g( x );   // which g()?
        }
        void h( A::Y y ) {
             h( y );   // which h()?
        }
}

We recommend you watch this entire episode before playing around with Herb's sample above (and don't read the GotW answer, either! That's cheating. Learn from STL. He's an outstanding teacher, as you know).

Tune in. Enjoy. Learn.