Determining if a symbol is a function

[Lars Kyllingstad]

Doctor J wrote:
> Answered my own question:
> 
>     static if (is(typeof(func0) == function))
>         writefln("func0 is a function.");
> 
> is() really wants a type, not an expression.

You say you want to test whether a struct/class member is a field or a 
property. Pointers to class and struct methods are delegates, not 
function pointers.

     http://www.digitalmars.com/d/1.0/type.html#delegates

So the correct thing to write would be:

     static if (is(typeof(func0) == delegate)) { ... }

or, to test whether func0 is a function OR a delegate,

     static if (is(typeof(func0) == return)) { ... }

For details, see
     http://www.digitalmars.com/d/1.0/expression.html#IsExpression

-Lars